(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
var d3_composite = require("d3-composite-projections");
var d3_geo = require("d3-geo");
var d3_request = require("d3-request");
var d3_selection = require("d3-selection");
var d3_transition = require("d3-transition");
var topojson = require("topojson");

var width = 960;
var height = 500;

var projection = d3_composite.geoAlbersUsa();

var path = d3_geo.geoPath()
    .projection(projection);

var svg = d3_selection.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

var t = d3_transition.transition()
  .on("interrupt", function(d,i){
    console.info(i);
  });

d3_request.json("us.json", function(error, topojsonData) {
    var us = topojson.feature(topojsonData, topojsonData.objects.states);

    svg.selectAll(".region")
      .data(us.features)
      .enter()
      .append("path")
      .attr("d", path)
      .attr("class","region")
      .style("fill", "#aca")
      .style("stroke", "#000")
      .style("stroke-width", "0.5px")
      .on("mouseover", function(d,i) {
        d3_selection.select(this)
          .transition(t)
          .style("fill", "red");
        })
      .on("mouseout", function(d,i) {
        d3_selection.select(this).interrupt();
        d3_selection.select(this)
          .transition(t)
          .style("fill", "#aca");
        });

      svg
        .append("path")
          .style("fill","none")
          .style("stroke","#f00")
          .attr("d", projection.getCompositionBorders());

});

},{"d3-composite-projections":5,"d3-geo":10,"d3-request":13,"d3-selection":14,"d3-transition":16,"topojson":17}],2:[function(require,module,exports){
// https://d3js.org/d3-array/ Version 1.0.1. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.d3 = global.d3 || {})));
}(this, function (exports) { 'use strict';

  function ascending(a, b) {
    return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
  }

  function bisector(compare) {
    if (compare.length === 1) compare = ascendingComparator(compare);
    return {
      left: function(a, x, lo, hi) {
        if (lo == null) lo = 0;
        if (hi == null) hi = a.length;
        while (lo < hi) {
          var mid = lo + hi >>> 1;
          if (compare(a[mid], x) < 0) lo = mid + 1;
          else hi = mid;
        }
        return lo;
      },
      right: function(a, x, lo, hi) {
        if (lo == null) lo = 0;
        if (hi == null) hi = a.length;
        while (lo < hi) {
          var mid = lo + hi >>> 1;
          if (compare(a[mid], x) > 0) hi = mid;
          else lo = mid + 1;
        }
        return lo;
      }
    };
  }

  function ascendingComparator(f) {
    return function(d, x) {
      return ascending(f(d), x);
    };
  }

  var ascendingBisect = bisector(ascending);
  var bisectRight = ascendingBisect.right;
  var bisectLeft = ascendingBisect.left;

  function descending(a, b) {
    return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
  }

  function number(x) {
    return x === null ? NaN : +x;
  }

  function variance(array, f) {
    var n = array.length,
        m = 0,
        a,
        d,
        s = 0,
        i = -1,
        j = 0;

    if (f == null) {
      while (++i < n) {
        if (!isNaN(a = number(array[i]))) {
          d = a - m;
          m += d / ++j;
          s += d * (a - m);
        }
      }
    }

    else {
      while (++i < n) {
        if (!isNaN(a = number(f(array[i], i, array)))) {
          d = a - m;
          m += d / ++j;
          s += d * (a - m);
        }
      }
    }

    if (j > 1) return s / (j - 1);
  }

  function deviation(array, f) {
    var v = variance(array, f);
    return v ? Math.sqrt(v) : v;
  }

  function extent(array, f) {
    var i = -1,
        n = array.length,
        a,
        b,
        c;

    if (f == null) {
      while (++i < n) if ((b = array[i]) != null && b >= b) { a = c = b; break; }
      while (++i < n) if ((b = array[i]) != null) {
        if (a > b) a = b;
        if (c < b) c = b;
      }
    }

    else {
      while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) { a = c = b; break; }
      while (++i < n) if ((b = f(array[i], i, array)) != null) {
        if (a > b) a = b;
        if (c < b) c = b;
      }
    }

    return [a, c];
  }

  var array = Array.prototype;

  var slice = array.slice;
  var map = array.map;

  function constant(x) {
    return function() {
      return x;
    };
  }

  function identity(x) {
    return x;
  }

  function range(start, stop, step) {
    start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;

    var i = -1,
        n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
        range = new Array(n);

    while (++i < n) {
      range[i] = start + i * step;
    }

    return range;
  }

  var e10 = Math.sqrt(50);
  var e5 = Math.sqrt(10);
  var e2 = Math.sqrt(2);
  function ticks(start, stop, count) {
    var step = tickStep(start, stop, count);
    return range(
      Math.ceil(start / step) * step,
      Math.floor(stop / step) * step + step / 2, // inclusive
      step
    );
  }

  function tickStep(start, stop, count) {
    var step0 = Math.abs(stop - start) / Math.max(0, count),
        step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
        error = step0 / step1;
    if (error >= e10) step1 *= 10;
    else if (error >= e5) step1 *= 5;
    else if (error >= e2) step1 *= 2;
    return stop < start ? -step1 : step1;
  }

  function sturges(values) {
    return Math.ceil(Math.log(values.length) / Math.LN2) + 1;
  }

  function histogram() {
    var value = identity,
        domain = extent,
        threshold = sturges;

    function histogram(data) {
      var i,
          n = data.length,
          x,
          values = new Array(n);

      for (i = 0; i < n; ++i) {
        values[i] = value(data[i], i, data);
      }

      var xz = domain(values),
          x0 = xz[0],
          x1 = xz[1],
          tz = threshold(values, x0, x1);

      // Convert number of thresholds into uniform thresholds.
      if (!Array.isArray(tz)) tz = ticks(x0, x1, tz);

      // Remove any thresholds outside the domain.
      var m = tz.length;
      while (tz[0] <= x0) tz.shift(), --m;
      while (tz[m - 1] >= x1) tz.pop(), --m;

      var bins = new Array(m + 1),
          bin;

      // Initialize bins.
      for (i = 0; i <= m; ++i) {
        bin = bins[i] = [];
        bin.x0 = i > 0 ? tz[i - 1] : x0;
        bin.x1 = i < m ? tz[i] : x1;
      }

      // Assign data to bins by value, ignoring any outside the domain.
      for (i = 0; i < n; ++i) {
        x = values[i];
        if (x0 <= x && x <= x1) {
          bins[bisectRight(tz, x, 0, m)].push(data[i]);
        }
      }

      return bins;
    }

    histogram.value = function(_) {
      return arguments.length ? (value = typeof _ === "function" ? _ : constant(_), histogram) : value;
    };

    histogram.domain = function(_) {
      return arguments.length ? (domain = typeof _ === "function" ? _ : constant([_[0], _[1]]), histogram) : domain;
    };

    histogram.thresholds = function(_) {
      return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;
    };

    return histogram;
  }

  function quantile(array, p, f) {
    if (f == null) f = number;
    if (!(n = array.length)) return;
    if ((p = +p) <= 0 || n < 2) return +f(array[0], 0, array);
    if (p >= 1) return +f(array[n - 1], n - 1, array);
    var n,
        h = (n - 1) * p,
        i = Math.floor(h),
        a = +f(array[i], i, array),
        b = +f(array[i + 1], i + 1, array);
    return a + (b - a) * (h - i);
  }

  function freedmanDiaconis(values, min, max) {
    values = map.call(values, number).sort(ascending);
    return Math.ceil((max - min) / (2 * (quantile(values, 0.75) - quantile(values, 0.25)) * Math.pow(values.length, -1 / 3)));
  }

  function scott(values, min, max) {
    return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));
  }

  function max(array, f) {
    var i = -1,
        n = array.length,
        a,
        b;

    if (f == null) {
      while (++i < n) if ((b = array[i]) != null && b >= b) { a = b; break; }
      while (++i < n) if ((b = array[i]) != null && b > a) a = b;
    }

    else {
      while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) { a = b; break; }
      while (++i < n) if ((b = f(array[i], i, array)) != null && b > a) a = b;
    }

    return a;
  }

  function mean(array, f) {
    var s = 0,
        n = array.length,
        a,
        i = -1,
        j = n;

    if (f == null) {
      while (++i < n) if (!isNaN(a = number(array[i]))) s += a; else --j;
    }

    else {
      while (++i < n) if (!isNaN(a = number(f(array[i], i, array)))) s += a; else --j;
    }

    if (j) return s / j;
  }

  function median(array, f) {
    var numbers = [],
        n = array.length,
        a,
        i = -1;

    if (f == null) {
      while (++i < n) if (!isNaN(a = number(array[i]))) numbers.push(a);
    }

    else {
      while (++i < n) if (!isNaN(a = number(f(array[i], i, array)))) numbers.push(a);
    }

    return quantile(numbers.sort(ascending), 0.5);
  }

  function merge(arrays) {
    var n = arrays.length,
        m,
        i = -1,
        j = 0,
        merged,
        array;

    while (++i < n) j += arrays[i].length;
    merged = new Array(j);

    while (--n >= 0) {
      array = arrays[n];
      m = array.length;
      while (--m >= 0) {
        merged[--j] = array[m];
      }
    }

    return merged;
  }

  function min(array, f) {
    var i = -1,
        n = array.length,
        a,
        b;

    if (f == null) {
      while (++i < n) if ((b = array[i]) != null && b >= b) { a = b; break; }
      while (++i < n) if ((b = array[i]) != null && a > b) a = b;
    }

    else {
      while (++i < n) if ((b = f(array[i], i, array)) != null && b >= b) { a = b; break; }
      while (++i < n) if ((b = f(array[i], i, array)) != null && a > b) a = b;
    }

    return a;
  }

  function pairs(array) {
    var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n);
    while (i < n) pairs[i] = [p, p = array[++i]];
    return pairs;
  }

  function permute(array, indexes) {
    var i = indexes.length, permutes = new Array(i);
    while (i--) permutes[i] = array[indexes[i]];
    return permutes;
  }

  function scan(array, compare) {
    if (!(n = array.length)) return;
    var i = 0,
        n,
        j = 0,
        xi,
        xj = array[j];

    if (!compare) compare = ascending;

    while (++i < n) if (compare(xi = array[i], xj) < 0 || compare(xj, xj) !== 0) xj = xi, j = i;

    if (compare(xj, xj) === 0) return j;
  }

  function shuffle(array, i0, i1) {
    var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),
        t,
        i;

    while (m) {
      i = Math.random() * m-- | 0;
      t = array[m + i0];
      array[m + i0] = array[i + i0];
      array[i + i0] = t;
    }

    return array;
  }

  function sum(array, f) {
    var s = 0,
        n = array.length,
        a,
        i = -1;

    if (f == null) {
      while (++i < n) if (a = +array[i]) s += a; // Note: zero and null are equivalent.
    }

    else {
      while (++i < n) if (a = +f(array[i], i, array)) s += a;
    }

    return s;
  }

  function transpose(matrix) {
    if (!(n = matrix.length)) return [];
    for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {
      for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {
        row[j] = matrix[j][i];
      }
    }
    return transpose;
  }

  function length(d) {
    return d.length;
  }

  function zip() {
    return transpose(arguments);
  }

  exports.bisect = bisectRight;
  exports.bisectRight = bisectRight;
  exports.bisectLeft = bisectLeft;
  exports.ascending = ascending;
  exports.bisector = bisector;
  exports.descending = descending;
  exports.deviation = deviation;
  exports.extent = extent;
  exports.histogram = histogram;
  exports.thresholdFreedmanDiaconis = freedmanDiaconis;
  exports.thresholdScott = scott;
  exports.thresholdSturges = sturges;
  exports.max = max;
  exports.mean = mean;
  exports.median = median;
  exports.merge = merge;
  exports.min = min;
  exports.pairs = pairs;
  exports.permute = permute;
  exports.quantile = quantile;
  exports.range = range;
  exports.scan = scan;
  exports.shuffle = shuffle;
  exports.sum = sum;
  exports.ticks = ticks;
  exports.tickStep = tickStep;
  exports.transpose = transpose;
  exports.variance = variance;
  exports.zip = zip;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
},{}],3:[function(require,module,exports){
// https://d3js.org/d3-collection/ Version 1.0.1. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.d3 = global.d3 || {})));
}(this, function (exports) { 'use strict';

  var prefix = "$";

  function Map() {}

  Map.prototype = map.prototype = {
    constructor: Map,
    has: function(key) {
      return (prefix + key) in this;
    },
    get: function(key) {
      return this[prefix + key];
    },
    set: function(key, value) {
      this[prefix + key] = value;
      return this;
    },
    remove: function(key) {
      var property = prefix + key;
      return property in this && delete this[property];
    },
    clear: function() {
      for (var property in this) if (property[0] === prefix) delete this[property];
    },
    keys: function() {
      var keys = [];
      for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));
      return keys;
    },
    values: function() {
      var values = [];
      for (var property in this) if (property[0] === prefix) values.push(this[property]);
      return values;
    },
    entries: function() {
      var entries = [];
      for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});
      return entries;
    },
    size: function() {
      var size = 0;
      for (var property in this) if (property[0] === prefix) ++size;
      return size;
    },
    empty: function() {
      for (var property in this) if (property[0] === prefix) return false;
      return true;
    },
    each: function(f) {
      for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);
    }
  };

  function map(object, f) {
    var map = new Map;

    // Copy constructor.
    if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });

    // Index array by numeric index or specified key function.
    else if (Array.isArray(object)) {
      var i = -1,
          n = object.length,
          o;

      if (f == null) while (++i < n) map.set(i, object[i]);
      else while (++i < n) map.set(f(o = object[i], i, object), o);
    }

    // Convert object to map.
    else if (object) for (var key in object) map.set(key, object[key]);

    return map;
  }

  function nest() {
    var keys = [],
        sortKeys = [],
        sortValues,
        rollup,
        nest;

    function apply(array, depth, createResult, setResult) {
      if (depth >= keys.length) return rollup != null
          ? rollup(array) : (sortValues != null
          ? array.sort(sortValues)
          : array);

      var i = -1,
          n = array.length,
          key = keys[depth++],
          keyValue,
          value,
          valuesByKey = map(),
          values,
          result = createResult();

      while (++i < n) {
        if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) {
          values.push(value);
        } else {
          valuesByKey.set(keyValue, [value]);
        }
      }

      valuesByKey.each(function(values, key) {
        setResult(result, key, apply(values, depth, createResult, setResult));
      });

      return result;
    }

    function entries(map, depth) {
      if (++depth > keys.length) return map;
      var array, sortKey = sortKeys[depth - 1];
      if (rollup != null && depth >= keys.length) array = map.entries();
      else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });
      return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;
    }

    return nest = {
      object: function(array) { return apply(array, 0, createObject, setObject); },
      map: function(array) { return apply(array, 0, createMap, setMap); },
      entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },
      key: function(d) { keys.push(d); return nest; },
      sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },
      sortValues: function(order) { sortValues = order; return nest; },
      rollup: function(f) { rollup = f; return nest; }
    };
  }

  function createObject() {
    return {};
  }

  function setObject(object, key, value) {
    object[key] = value;
  }

  function createMap() {
    return map();
  }

  function setMap(map, key, value) {
    map.set(key, value);
  }

  function Set() {}

  var proto = map.prototype;

  Set.prototype = set.prototype = {
    constructor: Set,
    has: proto.has,
    add: function(value) {
      value += "";
      this[prefix + value] = value;
      return this;
    },
    remove: proto.remove,
    clear: proto.clear,
    values: proto.keys,
    size: proto.size,
    empty: proto.empty,
    each: proto.each
  };

  function set(object, f) {
    var set = new Set;

    // Copy constructor.
    if (object instanceof Set) object.each(function(value) { set.add(value); });

    // Otherwise, assume it’s an array.
    else if (object) {
      var i = -1, n = object.length;
      if (f == null) while (++i < n) set.add(object[i]);
      else while (++i < n) set.add(f(object[i], i, object));
    }

    return set;
  }

  function keys(map) {
    var keys = [];
    for (var key in map) keys.push(key);
    return keys;
  }

  function values(map) {
    var values = [];
    for (var key in map) values.push(map[key]);
    return values;
  }

  function entries(map) {
    var entries = [];
    for (var key in map) entries.push({key: key, value: map[key]});
    return entries;
  }

  exports.nest = nest;
  exports.set = set;
  exports.map = map;
  exports.keys = keys;
  exports.values = values;
  exports.entries = entries;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
},{}],4:[function(require,module,exports){
// https://d3js.org/d3-color/ Version 1.0.1. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.d3 = global.d3 || {})));
}(this, function (exports) { 'use strict';

  function define(constructor, factory, prototype) {
    constructor.prototype = factory.prototype = prototype;
    prototype.constructor = constructor;
  }

  function extend(parent, definition) {
    var prototype = Object.create(parent.prototype);
    for (var key in definition) prototype[key] = definition[key];
    return prototype;
  }

  function Color() {}

  var darker = 0.7;
  var brighter = 1 / darker;

  var reHex3 = /^#([0-9a-f]{3})$/;
  var reHex6 = /^#([0-9a-f]{6})$/;
  var reRgbInteger = /^rgb\(\s*([-+]?\d+)\s*,\s*([-+]?\d+)\s*,\s*([-+]?\d+)\s*\)$/;
  var reRgbPercent = /^rgb\(\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*\)$/;
  var reRgbaInteger = /^rgba\(\s*([-+]?\d+)\s*,\s*([-+]?\d+)\s*,\s*([-+]?\d+)\s*,\s*([-+]?\d+(?:\.\d+)?)\s*\)$/;
  var reRgbaPercent = /^rgba\(\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)\s*\)$/;
  var reHslPercent = /^hsl\(\s*([-+]?\d+(?:\.\d+)?)\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*\)$/;
  var reHslaPercent = /^hsla\(\s*([-+]?\d+(?:\.\d+)?)\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)%\s*,\s*([-+]?\d+(?:\.\d+)?)\s*\)$/;
  var named = {
    aliceblue: 0xf0f8ff,
    antiquewhite: 0xfaebd7,
    aqua: 0x00ffff,
    aquamarine: 0x7fffd4,
    azure: 0xf0ffff,
    beige: 0xf5f5dc,
    bisque: 0xffe4c4,
    black: 0x000000,
    blanchedalmond: 0xffebcd,
    blue: 0x0000ff,
    blueviolet: 0x8a2be2,
    brown: 0xa52a2a,
    burlywood: 0xdeb887,
    cadetblue: 0x5f9ea0,
    chartreuse: 0x7fff00,
    chocolate: 0xd2691e,
    coral: 0xff7f50,
    cornflowerblue: 0x6495ed,
    cornsilk: 0xfff8dc,
    crimson: 0xdc143c,
    cyan: 0x00ffff,
    darkblue: 0x00008b,
    darkcyan: 0x008b8b,
    darkgoldenrod: 0xb8860b,
    darkgray: 0xa9a9a9,
    darkgreen: 0x006400,
    darkgrey: 0xa9a9a9,
    darkkhaki: 0xbdb76b,
    darkmagenta: 0x8b008b,
    darkolivegreen: 0x556b2f,
    darkorange: 0xff8c00,
    darkorchid: 0x9932cc,
    darkred: 0x8b0000,
    darksalmon: 0xe9967a,
    darkseagreen: 0x8fbc8f,
    darkslateblue: 0x483d8b,
    darkslategray: 0x2f4f4f,
    darkslategrey: 0x2f4f4f,
    darkturquoise: 0x00ced1,
    darkviolet: 0x9400d3,
    deeppink: 0xff1493,
    deepskyblue: 0x00bfff,
    dimgray: 0x696969,
    dimgrey: 0x696969,
    dodgerblue: 0x1e90ff,
    firebrick: 0xb22222,
    floralwhite: 0xfffaf0,
    forestgreen: 0x228b22,
    fuchsia: 0xff00ff,
    gainsboro: 0xdcdcdc,
    ghostwhite: 0xf8f8ff,
    gold: 0xffd700,
    goldenrod: 0xdaa520,
    gray: 0x808080,
    green: 0x008000,
    greenyellow: 0xadff2f,
    grey: 0x808080,
    honeydew: 0xf0fff0,
    hotpink: 0xff69b4,
    indianred: 0xcd5c5c,
    indigo: 0x4b0082,
    ivory: 0xfffff0,
    khaki: 0xf0e68c,
    lavender: 0xe6e6fa,
    lavenderblush: 0xfff0f5,
    lawngreen: 0x7cfc00,
    lemonchiffon: 0xfffacd,
    lightblue: 0xadd8e6,
    lightcoral: 0xf08080,
    lightcyan: 0xe0ffff,
    lightgoldenrodyellow: 0xfafad2,
    lightgray: 0xd3d3d3,
    lightgreen: 0x90ee90,
    lightgrey: 0xd3d3d3,
    lightpink: 0xffb6c1,
    lightsalmon: 0xffa07a,
    lightseagreen: 0x20b2aa,
    lightskyblue: 0x87cefa,
    lightslategray: 0x778899,
    lightslategrey: 0x778899,
    lightsteelblue: 0xb0c4de,
    lightyellow: 0xffffe0,
    lime: 0x00ff00,
    limegreen: 0x32cd32,
    linen: 0xfaf0e6,
    magenta: 0xff00ff,
    maroon: 0x800000,
    mediumaquamarine: 0x66cdaa,
    mediumblue: 0x0000cd,
    mediumorchid: 0xba55d3,
    mediumpurple: 0x9370db,
    mediumseagreen: 0x3cb371,
    mediumslateblue: 0x7b68ee,
    mediumspringgreen: 0x00fa9a,
    mediumturquoise: 0x48d1cc,
    mediumvioletred: 0xc71585,
    midnightblue: 0x191970,
    mintcream: 0xf5fffa,
    mistyrose: 0xffe4e1,
    moccasin: 0xffe4b5,
    navajowhite: 0xffdead,
    navy: 0x000080,
    oldlace: 0xfdf5e6,
    olive: 0x808000,
    olivedrab: 0x6b8e23,
    orange: 0xffa500,
    orangered: 0xff4500,
    orchid: 0xda70d6,
    palegoldenrod: 0xeee8aa,
    palegreen: 0x98fb98,
    paleturquoise: 0xafeeee,
    palevioletred: 0xdb7093,
    papayawhip: 0xffefd5,
    peachpuff: 0xffdab9,
    peru: 0xcd853f,
    pink: 0xffc0cb,
    plum: 0xdda0dd,
    powderblue: 0xb0e0e6,
    purple: 0x800080,
    rebeccapurple: 0x663399,
    red: 0xff0000,
    rosybrown: 0xbc8f8f,
    royalblue: 0x4169e1,
    saddlebrown: 0x8b4513,
    salmon: 0xfa8072,
    sandybrown: 0xf4a460,
    seagreen: 0x2e8b57,
    seashell: 0xfff5ee,
    sienna: 0xa0522d,
    silver: 0xc0c0c0,
    skyblue: 0x87ceeb,
    slateblue: 0x6a5acd,
    slategray: 0x708090,
    slategrey: 0x708090,
    snow: 0xfffafa,
    springgreen: 0x00ff7f,
    steelblue: 0x4682b4,
    tan: 0xd2b48c,
    teal: 0x008080,
    thistle: 0xd8bfd8,
    tomato: 0xff6347,
    turquoise: 0x40e0d0,
    violet: 0xee82ee,
    wheat: 0xf5deb3,
    white: 0xffffff,
    whitesmoke: 0xf5f5f5,
    yellow: 0xffff00,
    yellowgreen: 0x9acd32
  };

  define(Color, color, {
    displayable: function() {
      return this.rgb().displayable();
    },
    toString: function() {
      return this.rgb() + "";
    }
  });

  function color(format) {
    var m;
    format = (format + "").trim().toLowerCase();
    return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
        : (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
        : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
        : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
        : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
        : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
        : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
        : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
        : named.hasOwnProperty(format) ? rgbn(named[format])
        : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
        : null;
  }

  function rgbn(n) {
    return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
  }

  function rgba(r, g, b, a) {
    if (a <= 0) r = g = b = NaN;
    return new Rgb(r, g, b, a);
  }

  function rgbConvert(o) {
    if (!(o instanceof Color)) o = color(o);
    if (!o) return new Rgb;
    o = o.rgb();
    return new Rgb(o.r, o.g, o.b, o.opacity);
  }

  function rgb(r, g, b, opacity) {
    return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
  }

  function Rgb(r, g, b, opacity) {
    this.r = +r;
    this.g = +g;
    this.b = +b;
    this.opacity = +opacity;
  }

  define(Rgb, rgb, extend(Color, {
    brighter: function(k) {
      k = k == null ? brighter : Math.pow(brighter, k);
      return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
    },
    darker: function(k) {
      k = k == null ? darker : Math.pow(darker, k);
      return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
    },
    rgb: function() {
      return this;
    },
    displayable: function() {
      return (0 <= this.r && this.r <= 255)
          && (0 <= this.g && this.g <= 255)
          && (0 <= this.b && this.b <= 255)
          && (0 <= this.opacity && this.opacity <= 1);
    },
    toString: function() {
      var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
      return (a === 1 ? "rgb(" : "rgba(")
          + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
          + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
          + Math.max(0, Math.min(255, Math.round(this.b) || 0))
          + (a === 1 ? ")" : ", " + a + ")");
    }
  }));

  function hsla(h, s, l, a) {
    if (a <= 0) h = s = l = NaN;
    else if (l <= 0 || l >= 1) h = s = NaN;
    else if (s <= 0) h = NaN;
    return new Hsl(h, s, l, a);
  }

  function hslConvert(o) {
    if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
    if (!(o instanceof Color)) o = color(o);
    if (!o) return new Hsl;
    if (o instanceof Hsl) return o;
    o = o.rgb();
    var r = o.r / 255,
        g = o.g / 255,
        b = o.b / 255,
        min = Math.min(r, g, b),
        max = Math.max(r, g, b),
        h = NaN,
        s = max - min,
        l = (max + min) / 2;
    if (s) {
      if (r === max) h = (g - b) / s + (g < b) * 6;
      else if (g === max) h = (b - r) / s + 2;
      else h = (r - g) / s + 4;
      s /= l < 0.5 ? max + min : 2 - max - min;
      h *= 60;
    } else {
      s = l > 0 && l < 1 ? 0 : h;
    }
    return new Hsl(h, s, l, o.opacity);
  }

  function hsl(h, s, l, opacity) {
    return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
  }

  function Hsl(h, s, l, opacity) {
    this.h = +h;
    this.s = +s;
    this.l = +l;
    this.opacity = +opacity;
  }

  define(Hsl, hsl, extend(Color, {
    brighter: function(k) {
      k = k == null ? brighter : Math.pow(brighter, k);
      return new Hsl(this.h, this.s, this.l * k, this.opacity);
    },
    darker: function(k) {
      k = k == null ? darker : Math.pow(darker, k);
      return new Hsl(this.h, this.s, this.l * k, this.opacity);
    },
    rgb: function() {
      var h = this.h % 360 + (this.h < 0) * 360,
          s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
          l = this.l,
          m2 = l + (l < 0.5 ? l : 1 - l) * s,
          m1 = 2 * l - m2;
      return new Rgb(
        hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
        hsl2rgb(h, m1, m2),
        hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
        this.opacity
      );
    },
    displayable: function() {
      return (0 <= this.s && this.s <= 1 || isNaN(this.s))
          && (0 <= this.l && this.l <= 1)
          && (0 <= this.opacity && this.opacity <= 1);
    }
  }));

  /* From FvD 13.37, CSS Color Module Level 3 */
  function hsl2rgb(h, m1, m2) {
    return (h < 60 ? m1 + (m2 - m1) * h / 60
        : h < 180 ? m2
        : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
        : m1) * 255;
  }

  var deg2rad = Math.PI / 180;
  var rad2deg = 180 / Math.PI;

  var Kn = 18;
  var Xn = 0.950470;
  var Yn = 1;
  var Zn = 1.088830;
  var t0 = 4 / 29;
  var t1 = 6 / 29;
  var t2 = 3 * t1 * t1;
  var t3 = t1 * t1 * t1;
  function labConvert(o) {
    if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
    if (o instanceof Hcl) {
      var h = o.h * deg2rad;
      return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
    }
    if (!(o instanceof Rgb)) o = rgbConvert(o);
    var b = rgb2xyz(o.r),
        a = rgb2xyz(o.g),
        l = rgb2xyz(o.b),
        x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),
        y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),
        z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);
    return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
  }

  function lab(l, a, b, opacity) {
    return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
  }

  function Lab(l, a, b, opacity) {
    this.l = +l;
    this.a = +a;
    this.b = +b;
    this.opacity = +opacity;
  }

  define(Lab, lab, extend(Color, {
    brighter: function(k) {
      return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
    },
    darker: function(k) {
      return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
    },
    rgb: function() {
      var y = (this.l + 16) / 116,
          x = isNaN(this.a) ? y : y + this.a / 500,
          z = isNaN(this.b) ? y : y - this.b / 200;
      y = Yn * lab2xyz(y);
      x = Xn * lab2xyz(x);
      z = Zn * lab2xyz(z);
      return new Rgb(
        xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB
        xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),
        xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z),
        this.opacity
      );
    }
  }));

  function xyz2lab(t) {
    return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;
  }

  function lab2xyz(t) {
    return t > t1 ? t * t * t : t2 * (t - t0);
  }

  function xyz2rgb(x) {
    return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
  }

  function rgb2xyz(x) {
    return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
  }

  function hclConvert(o) {
    if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
    if (!(o instanceof Lab)) o = labConvert(o);
    var h = Math.atan2(o.b, o.a) * rad2deg;
    return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
  }

  function hcl(h, c, l, opacity) {
    return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
  }

  function Hcl(h, c, l, opacity) {
    this.h = +h;
    this.c = +c;
    this.l = +l;
    this.opacity = +opacity;
  }

  define(Hcl, hcl, extend(Color, {
    brighter: function(k) {
      return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);
    },
    darker: function(k) {
      return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);
    },
    rgb: function() {
      return labConvert(this).rgb();
    }
  }));

  var A = -0.14861;
  var B = +1.78277;
  var C = -0.29227;
  var D = -0.90649;
  var E = +1.97294;
  var ED = E * D;
  var EB = E * B;
  var BC_DA = B * C - D * A;
  function cubehelixConvert(o) {
    if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
    if (!(o instanceof Rgb)) o = rgbConvert(o);
    var r = o.r / 255,
        g = o.g / 255,
        b = o.b / 255,
        l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
        bl = b - l,
        k = (E * (g - l) - C * bl) / D,
        s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
        h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;
    return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
  }

  function cubehelix(h, s, l, opacity) {
    return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
  }

  function Cubehelix(h, s, l, opacity) {
    this.h = +h;
    this.s = +s;
    this.l = +l;
    this.opacity = +opacity;
  }

  define(Cubehelix, cubehelix, extend(Color, {
    brighter: function(k) {
      k = k == null ? brighter : Math.pow(brighter, k);
      return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
    },
    darker: function(k) {
      k = k == null ? darker : Math.pow(darker, k);
      return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
    },
    rgb: function() {
      var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,
          l = +this.l,
          a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
          cosh = Math.cos(h),
          sinh = Math.sin(h);
      return new Rgb(
        255 * (l + a * (A * cosh + B * sinh)),
        255 * (l + a * (C * cosh + D * sinh)),
        255 * (l + a * (E * cosh)),
        this.opacity
      );
    }
  }));

  exports.color = color;
  exports.rgb = rgb;
  exports.hsl = hsl;
  exports.lab = lab;
  exports.hcl = hcl;
  exports.cubehelix = cubehelix;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
},{}],5:[function(require,module,exports){
// http://geoexamples.com/d3-composite-projections/ Version 1.0.0. Copyright 2016 Roger Veciana i Rovira.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-geo'), require('d3-path')) :
  typeof define === 'function' && define.amd ? define(['exports', 'd3-geo', 'd3-path'], factory) :
  (factory((global.d3 = global.d3 || {}),global.d3,global.d3));
}(this, function (exports,d3Geo,d3Path) { 'use strict';

  var epsilon = 1e-6;

  // The projections must have mutually exclusive clip regions on the sphere,
  // as this will avoid emitting interleaving lines and polygons.
  function multiplex(streams) {
    var n = streams.length;
    return {
      point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
      sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
      lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
      lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
      polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
      polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
    };
  }

  // A composite projection for the United States, configured by default for
  // 960×500. Also works quite well at 960×600 with scale 1285. The set of
  // standard parallels for each region comes from USGS, which is published here:
  // http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
  function albersUsa() {
    var cache,
        cacheStream,
        lower48 = d3Geo.geoAlbers(), lower48Point,
        alaska = d3Geo.geoConicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338
        hawaii = d3Geo.geoConicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007
        point, pointStream = {point: function(x, y) { point = [x, y]; }};

    function albersUsa(coordinates) {
      var x = coordinates[0], y = coordinates[1];
      return point = null,
          (lower48Point.point(x, y), point)
          || (alaskaPoint.point(x, y), point)
          || (hawaiiPoint.point(x, y), point);
    }

    albersUsa.invert = function(coordinates) {
      var k = lower48.scale(),
          t = lower48.translate(),
          x = (coordinates[0] - t[0]) / k,
          y = (coordinates[1] - t[1]) / k;
      return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska
          : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii
          : lower48).invert(coordinates);
    };

    albersUsa.stream = function(stream) {
      return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
    };

    albersUsa.precision = function(_) {
      if (!arguments.length) return lower48.precision();
      lower48.precision(_), alaska.precision(_), hawaii.precision(_);
      return albersUsa;
    };

    albersUsa.scale = function(_) {
      if (!arguments.length) return lower48.scale();
      lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
      return albersUsa.translate(lower48.translate());
    };

    albersUsa.translate = function(_) {
      if (!arguments.length) return lower48.translate();
      var k = lower48.scale(), x = +_[0], y = +_[1];

      lower48Point = lower48
          .translate(_)
          .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])
          .stream(pointStream);

      alaskaPoint = alaska
          .translate([x - 0.307 * k, y + 0.201 * k])
          .clipExtent([[x - 0.425 * k + epsilon, y + 0.120 * k + epsilon], [x - 0.214 * k - epsilon, y + 0.234 * k - epsilon]])
          .stream(pointStream);

      hawaiiPoint = hawaii
          .translate([x - 0.205 * k, y + 0.212 * k])
          .clipExtent([[x - 0.214 * k + epsilon, y + 0.166 * k + epsilon], [x - 0.115 * k - epsilon, y + 0.234 * k - epsilon]])
          .stream(pointStream);

      return albersUsa;
    };
    
    albersUsa.drawCompositionBorders = function(context) {
      var hawaii1 = lower48([-102.91, 26.3]);
      var hawaii2 = lower48([-104.0, 27.5]);
      var hawaii3 = lower48([-108.0, 29.1]);
      var hawaii4 = lower48([-110.0, 29.1]);

      var alaska1 = lower48([-110.0, 26.7]);
      var alaska2 = lower48([-112.8, 27.6]);
      var alaska3 = lower48([-114.3, 30.6]);
      var alaska4 = lower48([-119.3, 30.1]);

      context.moveTo(hawaii1[0], hawaii1[1]);
      context.lineTo(hawaii2[0], hawaii2[1]);
      context.lineTo(hawaii3[0], hawaii3[1]);
      context.lineTo(hawaii4[0], hawaii4[1]);

      context.moveTo(alaska1[0], alaska1[1]);
      context.lineTo(alaska2[0], alaska2[1]);
      context.lineTo(alaska3[0], alaska3[1]);
      context.lineTo(alaska4[0], alaska4[1]);

    };
    albersUsa.getCompositionBorders = function() {
      var context = d3Path.path();
      this.drawCompositionBorders(context);
      return context.toString();

    };


    return albersUsa.scale(1070);
  }

  // The projections must have mutually exclusive clip regions on the sphere,
  // as this will avoid emitting interleaving lines and polygons.
  function multiplex$1(streams) {
    var n = streams.length;
    return {
      point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
      sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
      lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
      lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
      polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
      polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
    };
  }

  // A composite projection for the United States, configured by default for
  // 960×500. Also works quite well at 960×600 with scale 1285. The set of
  // standard parallels for each region comes from USGS, which is published here:
  // http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
  function albersUsaTerritories() {
    var cache,
        cacheStream,
        lower48 = d3Geo.geoAlbers(), lower48Point,
        alaska = d3Geo.geoConicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338
        hawaii = d3Geo.geoConicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007
        puertoRico = d3Geo.geoConicEqualArea().rotate([66, 0]).center([0, 18]).parallels([8, 18]), puertoRicoPoint, //Taken from https://bl.ocks.org/mbostock/5629120
        samoa = d3Geo.geoEquirectangular().rotate([173, 14]), samoaPoint, // EPSG:4169
        guam = d3Geo.geoEquirectangular().rotate([-145, -16.8]), guamPoint,
        point, pointStream = {point: function(x, y) { point = [x, y]; }};

        /*
        var puertoRicoBbox = [[-68.3, 19], [-63.9, 17]];
        var samoaBbox = [[-171, -14], [-168, -14.8]];
        var guamBbox = [[144, 20.8], [146.5, 12.7]];
        */

    function albersUsa(coordinates) {
      var x = coordinates[0], y = coordinates[1];

      return point = null,
          (lower48Point.point(x, y), point) ||
          (alaskaPoint.point(x, y), point)  ||
          (hawaiiPoint.point(x, y), point)  ||
          (puertoRicoPoint.point(x, y), point) ||
          (samoaPoint.point(x, y), point)   ||
          (guamPoint.point(x, y), point);
    }

    albersUsa.invert = function(coordinates) {

      var k = lower48.scale(),
          t = lower48.translate(),
          x = (coordinates[0] - t[0]) / k,
          y = (coordinates[1] - t[1]) / k;
          /*
          //How are the return values calculated:
          console.info("******");
          var c0 = puertoRico(puertoRicoBbox[0]);
          var x0 = (c0[0] - t[0]) / k;
          var y0 = (c0[1] - t[1]) / k;

          console.info("p0 puertoRico", x0 + ' - ' + y0);

          var c1 = puertoRico(puertoRicoBbox[1]);
          var x1 = (c1[0] - t[0]) / k;
          var y1 = (c1[1] - t[1]) / k;

          console.info("p1 puertoRico", x1 + ' - ' + y1);

          c0 = samoa(samoaBbox[0]);
          x0 = (c0[0] - t[0]) / k;
          y0 = (c0[1] - t[1]) / k;

          console.info("p0 samoa", x0 + ' - ' + y0);

          c1 = samoa(samoaBbox[1]);
          x1 = (c1[0] - t[0]) / k;
          y1 = (c1[1] - t[1]) / k;

          console.info("p1 samoa", x1 + ' - ' + y1);

          c0 = guam(guamBbox[0]);
          x0 = (c0[0] - t[0]) / k;
          y0 = (c0[1] - t[1]) / k;

          console.info("p0 guam", x0 + ' - ' + y0);

          c1 = guam(guamBbox[1]);
          x1 = (c1[0] - t[0]) / k;
          y1 = (c1[1] - t[1]) / k;

          console.info("p1 guam", x1 + ' - ' + y1);
          */

      return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska
          : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii
          : y >= 0.2064 && y < 0.2413 && x >= 0.312 && x < 0.385 ? puertoRico
          : y >= 0.09 && y < 0.1197 && x >= -0.4243 && x < -0.3232 ? samoa
          : y >= -0.0518 && y < 0.0895 && x >= -0.4243 && x < -0.3824 ? guam
          : lower48).invert(coordinates);

    };

    albersUsa.stream = function(stream) {
      return cache && cacheStream === stream ? cache : cache = multiplex$1([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream), puertoRico.stream(stream), samoa.stream(stream), guam.stream(stream)]);
    };

    albersUsa.precision = function(_) {
      if (!arguments.length) {return lower48.precision();}
      lower48.precision(_);
      alaska.precision(_);
      hawaii.precision(_);
      puertoRico.precision(_);
      samoa.precision(_);
      guam.precision(_);
      return albersUsa;
    };

    albersUsa.scale = function(_) {
      if (!arguments.length) {return lower48.scale();}
      lower48.scale(_);
      alaska.scale(_ * 0.35);
      hawaii.scale(_);
      puertoRico.scale(_);
      samoa.scale(_* 2);
      guam.scale(_);
      return albersUsa.translate(lower48.translate());
    };

    albersUsa.translate = function(_) {
      if (!arguments.length) {return lower48.translate();}
      var k = lower48.scale(), x = +_[0], y = +_[1];

      /*
      var c0 = puertoRico.translate([x + 0.350 * k, y + 0.224 * k])(puertoRicoBbox[0]);
      var x0 = (x - c0[0]) / k;
      var y0 = (y - c0[1]) / k;

      var c1 = puertoRico.translate([x + 0.350 * k, y + 0.224 * k])(puertoRicoBbox[1]);
      var x1 = (x - c1[0]) / k;
      var y1 = (y - c1[1]) / k;

      console.info('puertoRico: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
      console.info('.clipExtent([[x '+
       (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
       ' * k + epsilon, y '+
       (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
       ' * k + epsilon],[x '+
       (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
       ' * k - epsilon, y '+
       (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
       ' * k - epsilon]])');

        c0 = samoa.translate([x - 0.492 * k, y + 0.09 * k])(samoaBbox[0]);
        x0 = (x - c0[0]) / k;
        y0 = (y - c0[1]) / k;

        c1 = samoa.translate([x - 0.492 * k, y + 0.09 * k])(samoaBbox[1]);
        x1 = (x - c1[0]) / k;
        y1 = (y - c1[1]) / k;

       console.info('samoa: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
       console.info('.clipExtent([[x '+
        (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
        ' * k + epsilon, y '+
        (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
        ' * k + epsilon],[x '+
        (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
        ' * k - epsilon, y '+
        (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
        ' * k - epsilon]])');

        c0 = guam.translate([x - 0.408 * k, y + 0.018 * k])(guamBbox[0]);
        x0 = (x - c0[0]) / k;
        y0 = (y - c0[1]) / k;

        c1 = guam.translate([x - 0.408 * k, y + 0.018 * k])(guamBbox[1]);
        x1 = (x - c1[0]) / k;
        y1 = (y - c1[1]) / k;

       console.info('guam: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
       console.info('.clipExtent([[x '+
        (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
        ' * k + epsilon, y '+
        (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
        ' * k + epsilon],[x '+
        (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
        ' * k - epsilon, y '+
        (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
        ' * k - epsilon]])');
        */

      lower48Point = lower48
          .translate(_)
          .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])
          .stream(pointStream);

      alaskaPoint = alaska
          .translate([x - 0.307 * k, y + 0.201 * k])
          .clipExtent([[x - 0.425 * k + epsilon, y + 0.120 * k + epsilon], [x - 0.214 * k - epsilon, y + 0.233 * k - epsilon]])
          .stream(pointStream);

      hawaiiPoint = hawaii
          .translate([x - 0.205 * k, y + 0.212 * k])
          .clipExtent([[x - 0.214 * k + epsilon, y + 0.166 * k + epsilon], [x - 0.115 * k - epsilon, y + 0.233 * k - epsilon]])
          .stream(pointStream);

      puertoRicoPoint = puertoRico
          .translate([x + 0.350 * k, y + 0.224 * k])
          .clipExtent([[x + 0.312 * k + epsilon, y + 0.2064 * k + epsilon],[x + 0.385 * k - epsilon, y + 0.233 * k - epsilon]])
          .stream(pointStream);

      samoaPoint = samoa
          .translate([x - 0.492 * k, y + 0.09 * k])
          .clipExtent([[x - 0.4243 * k + epsilon, y + 0.0903 * k + epsilon],[x - 0.3233 * k - epsilon, y + 0.1197 * k - epsilon]])
          .stream(pointStream);

      guamPoint = guam
          .translate([x - 0.408 * k, y + 0.018 * k])
          .clipExtent([[x - 0.4244 * k + epsilon, y - 0.0519 * k + epsilon],[x - 0.3824 * k - epsilon, y + 0.0895 * k - epsilon]])
          .stream(pointStream);


      return albersUsa;
    };

    albersUsa.drawCompositionBorders = function(context) {

      /*
      console.info("CLIP EXTENT hawaii: ", hawaii.clipExtent());
      console.info("UL BBOX:", lower48.invert([hawaii.clipExtent()[0][0], hawaii.clipExtent()[0][1]]));
      console.info("UR BBOX:", lower48.invert([hawaii.clipExtent()[1][0], hawaii.clipExtent()[0][1]]));
      console.info("LD BBOX:", lower48.invert([hawaii.clipExtent()[1][0], hawaii.clipExtent()[1][1]]));
      console.info("LL BBOX:", lower48.invert([hawaii.clipExtent()[0][0], hawaii.clipExtent()[1][1]]));

      console.info("CLIP EXTENT alaska: ", alaska.clipExtent());
      console.info("UL BBOX:", lower48.invert([alaska.clipExtent()[0][0], alaska.clipExtent()[0][1]]));
      console.info("UR BBOX:", lower48.invert([alaska.clipExtent()[1][0], alaska.clipExtent()[0][1]]));
      console.info("LD BBOX:", lower48.invert([alaska.clipExtent()[1][0], alaska.clipExtent()[1][1]]));
      console.info("LL BBOX:", lower48.invert([alaska.clipExtent()[0][0], alaska.clipExtent()[1][1]]));

      console.info("CLIP EXTENT puertoRico: ", puertoRico.clipExtent());
      console.info("UL BBOX:", lower48.invert([puertoRico.clipExtent()[0][0], puertoRico.clipExtent()[0][1]]));
      console.info("UR BBOX:", lower48.invert([puertoRico.clipExtent()[1][0], puertoRico.clipExtent()[0][1]]));
      console.info("LD BBOX:", lower48.invert([puertoRico.clipExtent()[1][0], puertoRico.clipExtent()[1][1]]));
      console.info("LL BBOX:", lower48.invert([puertoRico.clipExtent()[0][0], puertoRico.clipExtent()[1][1]]));

      console.info("CLIP EXTENT samoa: ", samoa.clipExtent());
      console.info("UL BBOX:", lower48.invert([samoa.clipExtent()[0][0], samoa.clipExtent()[0][1]]));
      console.info("UR BBOX:", lower48.invert([samoa.clipExtent()[1][0], samoa.clipExtent()[0][1]]));
      console.info("LD BBOX:", lower48.invert([samoa.clipExtent()[1][0], samoa.clipExtent()[1][1]]));
      console.info("LL BBOX:", lower48.invert([samoa.clipExtent()[0][0], samoa.clipExtent()[1][1]]));


      console.info("CLIP EXTENT guam: ", guam.clipExtent());
      console.info("UL BBOX:", lower48.invert([guam.clipExtent()[0][0], guam.clipExtent()[0][1]]));
      console.info("UR BBOX:", lower48.invert([guam.clipExtent()[1][0], guam.clipExtent()[0][1]]));
      console.info("LD BBOX:", lower48.invert([guam.clipExtent()[1][0], guam.clipExtent()[1][1]]));
      console.info("LL BBOX:", lower48.invert([guam.clipExtent()[0][0], guam.clipExtent()[1][1]]));
      */

      var ulhawaii = lower48([-110.4641, 28.2805]);
      var urhawaii = lower48([-104.0597, 28.9528]);
      var ldhawaii = lower48([-103.7049, 25.1031]);
      var llhawaii = lower48([-109.8337, 24.4531]);

      var ulalaska = lower48([ -124.4745, 28.1407]);
      var uralaska = lower48([ -110.931, 30.8844]);
      var ldalaska = lower48([-109.8337, 24.4531]);
      var llalaska = lower48([-122.4628, 21.8562]);

      var ulpuertoRico = lower48([-76.8579, 25.1544]);
      var urpuertoRico = lower48([-72.429, 24.2097]);
      var ldpuertoRico = lower48([-72.8265, 22.7056]);
      var llpuertoRico = lower48([-77.1852, 23.6392]);


      var ulsamoa = lower48([-125.0093, 29.7791]);
      var ursamoa = lower48([-118.5193, 31.3262]);
      var ldsamoa = lower48([-118.064, 29.6912]);
      var llsamoa = lower48([-124.4369, 28.169]);

      var ulguam = lower48([-128.1314, 37.4582]);
      var urguam = lower48([-125.2132, 38.214]);
      var ldguam = lower48([-122.3616, 30.5115]);
      var llguam = lower48([-125.0315, 29.8211]);

      context.moveTo(ulhawaii[0], ulhawaii[1]);
      context.lineTo(urhawaii[0], urhawaii[1]);
      context.lineTo(ldhawaii[0], ldhawaii[1]);
      context.lineTo(ldhawaii[0], ldhawaii[1]);
      context.lineTo(llhawaii[0], llhawaii[1]);
      context.closePath();

      context.moveTo(ulalaska[0], ulalaska[1]);
      context.lineTo(uralaska[0], uralaska[1]);
      context.lineTo(ldalaska[0], ldalaska[1]);
      context.lineTo(ldalaska[0], ldalaska[1]);
      context.lineTo(llalaska[0], llalaska[1]);
      context.closePath();

      context.moveTo(ulpuertoRico[0], ulpuertoRico[1]);
      context.lineTo(urpuertoRico[0], urpuertoRico[1]);
      context.lineTo(ldpuertoRico[0], ldpuertoRico[1]);
      context.lineTo(ldpuertoRico[0], ldpuertoRico[1]);
      context.lineTo(llpuertoRico[0], llpuertoRico[1]);
      context.closePath();

      context.moveTo(ulsamoa[0], ulsamoa[1]);
      context.lineTo(ursamoa[0], ursamoa[1]);
      context.lineTo(ldsamoa[0], ldsamoa[1]);
      context.lineTo(ldsamoa[0], ldsamoa[1]);
      context.lineTo(llsamoa[0], llsamoa[1]);
      context.closePath();

      context.moveTo(ulguam[0], ulguam[1]);
      context.lineTo(urguam[0], urguam[1]);
      context.lineTo(ldguam[0], ldguam[1]);
      context.lineTo(ldguam[0], ldguam[1]);
      context.lineTo(llguam[0], llguam[1]);
      context.closePath();

    };
    albersUsa.getCompositionBorders = function() {
      var context = d3Path.path();
      this.drawCompositionBorders(context);
      return context.toString();

    };


    return albersUsa.scale(1070);
  }

  // The projections must have mutually exclusive clip regions on the sphere,
  // as this will avoid emitting interleaving lines and polygons.
  function multiplex$2(streams) {
    var n = streams.length;
    return {
      point: function(x, y) { var i = -1; while (++i < n) {streams[i].point(x, y); }},
      sphere: function() { var i = -1; while (++i < n) {streams[i].sphere(); }},
      lineStart: function() { var i = -1; while (++i < n) {streams[i].lineStart(); }},
      lineEnd: function() { var i = -1; while (++i < n) {streams[i].lineEnd(); }},
      polygonStart: function() { var i = -1; while (++i < n) {streams[i].polygonStart(); }},
      polygonEnd: function() { var i = -1; while (++i < n) {streams[i].polygonEnd(); }}
    };
  }

  // A composite projection for Spain, configured by default for 960×500.
  function conicConformalSpain() {
    var cache,
        cacheStream,

        iberianPeninsule = d3Geo.geoConicConformal().rotate([5, -38.6]).parallels([0,60]), iberianPeninsulePoint,
        canaryIslands = d3Geo.geoConicConformal().rotate([5, -38.6]).parallels([0,60]), canaryIslandsPoint,

        point, pointStream = {point: function(x, y) { point = [x, y]; }};

        /*
        var iberianPeninsuleBbox = [[-11, 46], [4, 35]];
        var canaryIslandsBbox = [[-19.0, 28.85], [-12.7, 28.1]];
        */

    function conicConformalSpain(coordinates) {
      var x = coordinates[0], y = coordinates[1];
      return point = null,
          (iberianPeninsulePoint.point(x, y), point) ||
          (canaryIslandsPoint.point(x, y), point);
    }

    conicConformalSpain.invert = function(coordinates) {
      var k = iberianPeninsule.scale(),
          t = iberianPeninsule.translate(),
          x = (coordinates[0] - t[0]) / k,
          y = (coordinates[1] - t[1]) / k;
          /*
          //How are the return values calculated:
          var c0 = canaryIslands(canaryIslandsBbox[0]);
          var x0 = (c0[0] - t[0]) / k;
          var y0 = (c0[1] - t[1]) / k;

          console.info("p0 canary islands", x0 + ' - ' + y0);


          var c1 = canaryIslands(canaryIslandsBbox[1]);
          var x1 = (c1[0] - t[0]) / k;
          var y1 = (c1[1] - t[1]) / k;

          console.info("p1 canary islands", x1 + ' - ' + y1);
          */
          return (y >= 0.05346 && y< 0.0897 && x >= -0.13388 && x < -0.0322 ? canaryIslands
              : iberianPeninsule).invert(coordinates);
    };

    conicConformalSpain.stream = function(stream) {
      return cache && cacheStream === stream ? cache : cache = multiplex$2([iberianPeninsule.stream(cacheStream = stream), canaryIslands.stream(stream)]);
    };

    conicConformalSpain.precision = function(_) {
      if (!arguments.length) {return iberianPeninsule.precision();}
      iberianPeninsule.precision(_);
      canaryIslands.precision(_);
      return conicConformalSpain;
    };

    conicConformalSpain.scale = function(_) {
      if (!arguments.length) {return iberianPeninsule.scale();}
      iberianPeninsule.scale(_);
      canaryIslands.scale(_);
      return conicConformalSpain.translate(iberianPeninsule.translate());
    };

    conicConformalSpain.translate = function(_) {
      if (!arguments.length) {return iberianPeninsule.translate();}
      var k = iberianPeninsule.scale(), x = +_[0], y = +_[1];
      /*
      var c0 = iberianPeninsule(iberianPeninsuleBbox[0]);
     var x0 = (x - c0[0]) / k;
     var y0 = (y - c0[1]) / k;

     var c1 = iberianPeninsule(iberianPeninsuleBbox[1]);
     var x1 = (x - c1[0]) / k;
     var y1 = (y - c1[1]) / k;

     console.info('Iberian Peninsula: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);

     c0 = canaryIslands.translate([x + 0.1 * k, y - 0.094 * k])(canaryIslandsBbox[0]);
     x0 = (x - c0[0]) / k;
     y0 = (y - c0[1]) / k;

     c1 = canaryIslands.translate([x + 0.1 * k, y - 0.094 * k])(canaryIslandsBbox[1]);
     x1 = (x - c1[0]) / k;
     y1 = (y - c1[1]) / k;

     console.info('Canry Islands: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
     */
      iberianPeninsulePoint = iberianPeninsule
          .translate(_)
          .clipExtent([[x - 0.06857 * k, y - 0.1288 * k],[x + 0.13249 * k, y + 0.05292 * k]])
          .stream(pointStream);

      canaryIslandsPoint = canaryIslands
          .translate([x + 0.1 * k, y - 0.094 * k])
          .clipExtent([[x - 0.1331 * k + epsilon, y + 0.053457 * k + epsilon],[x  - 0.0354 * k - epsilon, y + 0.08969 * k - epsilon]])
          .stream(pointStream);

      return conicConformalSpain;
    };

    conicConformalSpain.drawCompositionBorders = function(context) {
      /*
      console.info("CLIP EXTENT: ", canaryIslands.clipExtent());
      console.info("UL BBOX:", iberianPeninsule.invert([canaryIslands.clipExtent()[0][0], canaryIslands.clipExtent()[0][1]]));
      console.info("UR BBOX:", iberianPeninsule.invert([canaryIslands.clipExtent()[1][0], canaryIslands.clipExtent()[0][1]]));
      console.info("LD BBOX:", iberianPeninsule.invert([canaryIslands.clipExtent()[1][0], canaryIslands.clipExtent()[1][1]]));
      */

      var ulCanaryIslands = iberianPeninsule([-14.0346750522884, 34.96500729877966]);
      var urCanaryIslands = iberianPeninsule([-7.4208899681602025, 35.53698899616862]);
      var ldCanaryIslands = iberianPeninsule([-7.314827535125545, 33.54359498636456]);

      context.moveTo(ulCanaryIslands[0], ulCanaryIslands[1]);
      context.lineTo(urCanaryIslands[0], urCanaryIslands[1]);
      context.lineTo(ldCanaryIslands[0], ldCanaryIslands[1]);
    };
    conicConformalSpain.getCompositionBorders = function() {
      var context = d3Path.path();
      this.drawCompositionBorders(context);
      return context.toString();
    };

    return conicConformalSpain.scale(2700);
  }

  // The projections must have mutually exclusive clip regions on the sphere,
  // as this will avoid emitting interleaving lines and polygons.
  function multiplex$3(streams) {
    var n = streams.length;
    return {
      point: function(x, y) { var i = -1; while (++i < n) {streams[i].point(x, y); }},
      sphere: function() { var i = -1; while (++i < n) {streams[i].sphere(); }},
      lineStart: function() { var i = -1; while (++i < n) {streams[i].lineStart(); }},
      lineEnd: function() { var i = -1; while (++i < n) {streams[i].lineEnd(); }},
      polygonStart: function() { var i = -1; while (++i < n) {streams[i].polygonStart(); }},
      polygonEnd: function() { var i = -1; while (++i < n) {streams[i].polygonEnd(); }}
    };
  }

  // A composite projection for Portugal, configured by default for 960×500.
  function conicConformalPortugal() {
    var cache,
        cacheStream,
        iberianPeninsule = d3Geo.geoConicConformal().rotate([10, -39.3]).parallels([0, 60]), iberianPeninsulePoint,
        madeira = d3Geo.geoConicConformal().rotate([17, -32.7]).parallels([0, 60]), madeiraPoint,
        azores = d3Geo.geoConicConformal().rotate([27.8, -38.6]).parallels([0, 60]), azoresPoint,

        point, pointStream = {point: function(x, y) { point = [x, y]; }};

        /*
        var iberianPeninsuleBbox = [[-11, 46], [4, 34]];
        var madeiraBbox = [[-17.85, 33.6], [-16, 32.02]];
        var azoresBbox = [[-32, 40.529], [-23.98, 35.75]];
        */


    function conicConformalPortugal(coordinates) {
      var x = coordinates[0], y = coordinates[1];
      return point = null,
          (iberianPeninsulePoint.point(x, y), point) ||
          (madeiraPoint.point(x, y), point) ||
          (azoresPoint.point(x, y), point);
    }

    conicConformalPortugal.invert = function(coordinates) {
      var k = iberianPeninsule.scale(),
          t = iberianPeninsule.translate(),
          x = (coordinates[0] - t[0]) / k,
          y = (coordinates[1] - t[1]) / k;

          /*
          //How are the return values calculated:
          console.info("******");
          var c0 = madeira(madeiraBbox[0]);
          var x0 = (c0[0] - t[0]) / k;
          var y0 = (c0[1] - t[1]) / k;

          console.info("p0 madeira", x0 + ' - ' + y0);

          var c1 = madeira(madeiraBbox[1]);
          var x1 = (c1[0] - t[0]) / k;
          var y1 = (c1[1] - t[1]) / k;

          console.info("p1 madeira", x1 + ' - ' + y1);

          c0 = azores(azoresBbox[0]);
          x0 = (c0[0] - t[0]) / k;
          y0 = (c0[1] - t[1]) / k;

          console.info("p0 azores", x0 + ' - ' + y0);

          c1 = azores(azoresBbox[1]);
          x1 = (c1[0] - t[0]) / k;
          y1 = (c1[1] - t[1]) / k;

          console.info("p1 azores", x1 + ' - ' + y1);
          */

          return (y >= 0.0093 && y< 0.03678 && x >= -0.03875 && x < -0.0116 ? madeira
              : y >= -0.0412 && y< 0.0091 && x >= -0.07782 && x < -0.01166 ? azores
              : iberianPeninsule).invert(coordinates);
    };

    conicConformalPortugal.stream = function(stream) {
      return cache && cacheStream === stream ? cache : cache = multiplex$3([iberianPeninsule.stream(cacheStream = stream), madeira.stream(stream), azores.stream(stream)]);
    };

    conicConformalPortugal.precision = function(_) {
      if (!arguments.length) {return iberianPeninsule.precision();}
      iberianPeninsule.precision(_);
      madeira.precision(_);
      azores.precision(_);
      return conicConformalPortugal;
    };

    conicConformalPortugal.scale = function(_) {
      if (!arguments.length) {return iberianPeninsule.scale();}
      iberianPeninsule.scale(_);
      madeira.scale(_);
      azores.scale(_ * 0.6);
      return conicConformalPortugal.translate(iberianPeninsule.translate());
    };

    conicConformalPortugal.translate = function(_) {
      if (!arguments.length) {return iberianPeninsule.translate();}
      var k = iberianPeninsule.scale(), x = +_[0], y = +_[1];
      /*
      var c0 = iberianPeninsule(iberianPeninsuleBbox[0]);
     var x0 = (x - c0[0]) / k;
     var y0 = (y - c0[1]) / k;

     var c1 = iberianPeninsule(iberianPeninsuleBbox[1]);
     var x1 = (x - c1[0]) / k;
     var y1 = (y - c1[1]) / k;

     console.info('Iberian Peninsula: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
     console.info('.clipExtent([[x '+
      (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
      ' * k, y '+
      (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
      ' * k],[x '+
      (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
      ' * k, y '+
      (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
      ' * k]])');

     c0 = madeira.translate([x - 0.0265 * k, y + 0.025 * k])(madeiraBbox[0]);
     x0 = (x - c0[0]) / k;
     y0 = (y - c0[1]) / k;

     c1 = madeira.translate([x - 0.0265 * k, y + 0.025 * k])(madeiraBbox[1]);
     x1 = (x - c1[0]) / k;
     y1 = (y - c1[1]) / k;

     console.info('Madeira: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
     console.info('.clipExtent([[x '+
      (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
      ' * k + epsilon, y '+
      (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
      ' * k + epsilon],[x '+
      (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
      ' * k - epsilon, y '+
      (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
      ' * k - epsilon]])');

      c0 = azores.translate([x - 0.045 * k, y + -0.02 * k])(azoresBbox[0]);
      x0 = (x - c0[0]) / k;
      y0 = (y - c0[1]) / k;

      c1 = azores.translate([x - 0.045 * k, y + -0.02 * k])(azoresBbox[1]);
      x1 = (x - c1[0]) / k;
      y1 = (y - c1[1]) / k;

      console.info('Azores: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
      console.info('.clipExtent([[x '+
       (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
       ' * k + epsilon, y '+
       (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
       ' * k + epsilon],[x '+
       (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
       ' * k - epsilon, y '+
       (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
       ' * k - epsilon]])');
       */
      iberianPeninsulePoint = iberianPeninsule
          .translate(_)
          .clipExtent([[x - 0.0115 * k, y - 0.1138 * k],[x +0.2105 * k, y +0.0673 * k]])
          .stream(pointStream);


      madeiraPoint = madeira
          .translate([x - 0.0265 * k, y + 0.025 * k])
          .clipExtent([[x - 0.0388 * k + epsilon, y + 0.0093 * k + epsilon],[x - 0.0116 * k - epsilon, y + 0.0368 * k - epsilon]])
          .stream(pointStream);

      azoresPoint = azores
          .translate([x - 0.045 * k, y + -0.02 * k])
          .clipExtent([[x - 0.0778 * k + epsilon, y - 0.0413 * k + epsilon],[x - 0.0117 * k - epsilon, y + 0.0091 * k - epsilon]])
          .stream(pointStream);

      return conicConformalPortugal;
    };

    conicConformalPortugal.drawCompositionBorders = function(context) {
      /*
      console.info("CLIP EXTENT MADEIRA: ", madeira.clipExtent());
      console.info("UL BBOX:", iberianPeninsule.invert([madeira.clipExtent()[0][0], madeira.clipExtent()[0][1]]));
      console.info("UR BBOX:", iberianPeninsule.invert([madeira.clipExtent()[1][0], madeira.clipExtent()[0][1]]));
      console.info("LD BBOX:", iberianPeninsule.invert([madeira.clipExtent()[1][0], madeira.clipExtent()[1][1]]));
      console.info("LL BBOX:", iberianPeninsule.invert([madeira.clipExtent()[0][0], madeira.clipExtent()[1][1]]));

      console.info("CLIP EXTENT AZORES: ", azores.clipExtent());
      console.info("UL BBOX:", iberianPeninsule.invert([azores.clipExtent()[0][0], azores.clipExtent()[0][1]]));
      console.info("UR BBOX:", iberianPeninsule.invert([azores.clipExtent()[1][0], azores.clipExtent()[0][1]]));
      console.info("LD BBOX:", iberianPeninsule.invert([azores.clipExtent()[1][0], azores.clipExtent()[1][1]]));
      console.info("LL BBOX:", iberianPeninsule.invert([azores.clipExtent()[0][0], azores.clipExtent()[1][1]]));
      */

      var ulmadeira = iberianPeninsule([-12.8351, 38.7113]);
      var urmadeira = iberianPeninsule([-10.8482, 38.7633]);
      var ldmadeira = iberianPeninsule([-10.8181, 37.2072]);
      var llmadeira = iberianPeninsule([-12.7345, 37.1573]);

      var ulazores = iberianPeninsule([-16.0753, 41.4436]);
      var urazores = iberianPeninsule([-10.9168, 41.6861]);
      var ldazores = iberianPeninsule([-10.8557, 38.7747]);
      var llazores = iberianPeninsule([-15.6728, 38.5505]);

      context.moveTo(ulmadeira[0], ulmadeira[1]);
      context.lineTo(urmadeira[0], urmadeira[1]);
      context.lineTo(ldmadeira[0], ldmadeira[1]);
      context.lineTo(ldmadeira[0], ldmadeira[1]);
      context.lineTo(llmadeira[0], llmadeira[1]);
      context.closePath();

      context.moveTo(ulazores[0], ulazores[1]);
      context.lineTo(urazores[0], urazores[1]);
      context.lineTo(ldazores[0], ldazores[1]);
      context.lineTo(ldazores[0], ldazores[1]);
      context.lineTo(llazores[0], llazores[1]);
      context.closePath();

    };
    conicConformalPortugal.getCompositionBorders = function() {
      var context = d3Path.path();
      this.drawCompositionBorders(context);
      return context.toString();
    };

    return conicConformalPortugal.scale(4200);
  }

  // The projections must have mutually exclusive clip regions on the sphere,
  // as this will avoid emitting interleaving lines and polygons.
  function multiplex$4(streams) {
    var n = streams.length;
    return {
      point: function(x, y) { var i = -1; while (++i < n) {streams[i].point(x, y); }},
      sphere: function() { var i = -1; while (++i < n) {streams[i].sphere(); }},
      lineStart: function() { var i = -1; while (++i < n) {streams[i].lineStart(); }},
      lineEnd: function() { var i = -1; while (++i < n) {streams[i].lineEnd(); }},
      polygonStart: function() { var i = -1; while (++i < n) {streams[i].polygonStart(); }},
      polygonEnd: function() { var i = -1; while (++i < n) {streams[i].polygonEnd(); }}
    };
  }

  // A composite projection for Ecuador, configured by default for 960×500.
  function mercatorEcuador() {
    var cache,
        cacheStream,

        mainland = d3Geo.geoMercator().rotate([80, 1.5]), mainlandPoint,
        galapagos = d3Geo.geoMercator().rotate([90.73, 1]), galapagosPoint,

        point, pointStream = {point: function(x, y) { point = [x, y]; }};

        /*
        var mainlandBbox = [[-81.5, 2.7], [-70.0, -6.0]];
        var galapagosBbox = [[-92.2, 0.58], [-88.8, -1.8]];
        */

    function mercatorEcuador(coordinates) {
      var x = coordinates[0], y = coordinates[1];
      return point = null,
          (mainlandPoint.point(x, y), point) ||
          (galapagosPoint.point(x, y), point);
    }

    mercatorEcuador.invert = function(coordinates) {
      var k = mainland.scale(),
          t = mainland.translate(),
          x = (coordinates[0] - t[0]) / k,
          y = (coordinates[1] - t[1]) / k;
          /*
          //How are the return values calculated:
          var c0 = galapagos(galapagosBbox[0]);
          var x0 = (c0[0] - t[0]) / k;
          var y0 = (c0[1] - t[1]) / k;

          console.info("p0 galapagos", x0 + ' - ' + y0);


          var c1 = galapagos(galapagosBbox[1]);
          var x1 = (c1[0] - t[0]) / k;
          var y1 = (c1[1] - t[1]) / k;

          console.info("p1 galapagos", x1 + ' - ' + y1);
          */
          return (y >= -0.0676 && y< -0.026 && x >= -0.0857 && x < -0.0263 ? galapagos
              : mainland).invert(coordinates);
    };

    mercatorEcuador.stream = function(stream) {
      return cache && cacheStream === stream ? cache : cache = multiplex$4([mainland.stream(cacheStream = stream), galapagos.stream(stream)]);
    };

    mercatorEcuador.precision = function(_) {
      if (!arguments.length) {return mainland.precision();}
      mainland.precision(_);
      galapagos.precision(_);
      return mercatorEcuador;
    };

    mercatorEcuador.scale = function(_) {
      if (!arguments.length) {return mainland.scale();}
      mainland.scale(_);
      galapagos.scale(_);
      return mercatorEcuador.translate(mainland.translate());
    };

    mercatorEcuador.translate = function(_) {
      if (!arguments.length) {return mainland.translate();}
      var k = mainland.scale(), x = +_[0], y = +_[1];
      /*
      var c0 = mainland(mainlandBbox[0]);
     var x0 = (x - c0[0]) / k;
     var y0 = (y - c0[1]) / k;

     var c1 = mainland(mainlandBbox[1]);
     var x1 = (x - c1[0]) / k;
     var y1 = (y - c1[1]) / k;

     console.info('mainland: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
     console.info('.clipExtent([[x '+
      (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
      ' * k, y '+
      (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
      ' * k],[x '+
      (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
      ' * k, y '+
      (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
      ' * k]])');

     c0 = galapagos.translate([x - 0.06 * k, y - 0.04 * k])(galapagosBbox[0]);
     x0 = (x - c0[0]) / k;
     y0 = (y - c0[1]) / k;

     c1 = galapagos.translate([x - 0.06 * k, y - 0.04 * k])(galapagosBbox[1]);
     x1 = (x - c1[0]) / k;
     y1 = (y - c1[1]) / k;

     console.info('galapagos: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
     console.info('.clipExtent([[x '+
      (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
      ' * k + epsilon, y '+
      (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
      ' * k + epsilon],[x '+
      (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
      ' * k - epsilon, y '+
      (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
      ' * k - epsilon]])');*/

      mainlandPoint = mainland
          .translate(_)
          .clipExtent([[x - 0.0262 * k, y - 0.0734 * k],[x + 0.1741 * k, y + 0.079 * k]])
          .stream(pointStream);

      galapagosPoint = galapagos
          .translate([x - 0.06 * k, y - 0.04 * k])
          .clipExtent([[x - 0.0857 * k + epsilon, y - 0.0676 * k + epsilon],[x - 0.0263 * k - epsilon, y - 0.026 * k - epsilon]])
          .stream(pointStream);

      return mercatorEcuador;
    };

    mercatorEcuador.drawCompositionBorders = function(context) {
      /*
      console.info("CLIP EXTENT: ", galapagos.clipExtent());
      console.info("UL BBOX:", mainland.invert([galapagos.clipExtent()[0][0], galapagos.clipExtent()[0][1]]));
      console.info("UR BBOX:", mainland.invert([galapagos.clipExtent()[1][0], galapagos.clipExtent()[0][1]]));
      console.info("LD BBOX:", mainland.invert([galapagos.clipExtent()[1][0], galapagos.clipExtent()[1][1]]));
      console.info("LL BBOX:", mainland.invert([galapagos.clipExtent()[0][0], galapagos.clipExtent()[1][1]]));
      */

      var ulgalapagos = mainland([-84.9032, 2.3757]);
      var urgalapagos = mainland([-81.5047, 2.3708]);
      var ldgalapagos = mainland([-81.5063, -0.01]);
      var llgalapagos = mainland([-84.9086, -0.005]);

      context.moveTo(ulgalapagos[0], ulgalapagos[1]);
      context.lineTo(urgalapagos[0], urgalapagos[1]);
      context.lineTo(ldgalapagos[0], ldgalapagos[1]);
      context.lineTo(llgalapagos[0], llgalapagos[1]);
      context.closePath();

    };
    mercatorEcuador.getCompositionBorders = function() {
      var context = d3Path.path();
      this.drawCompositionBorders(context);
      return context.toString();
    };

    return mercatorEcuador.scale(3500);
  }

  // The projections must have mutually exclusive clip regions on the sphere,
  // as this will avoid emitting interleaving lines and polygons.
  function multiplex$5(streams) {
    var n = streams.length;
    return {
      point: function(x, y) { var i = -1; while (++i < n) {streams[i].point(x, y); }},
      sphere: function() { var i = -1; while (++i < n) {streams[i].sphere(); }},
      lineStart: function() { var i = -1; while (++i < n) {streams[i].lineStart(); }},
      lineEnd: function() { var i = -1; while (++i < n) {streams[i].lineEnd(); }},
      polygonStart: function() { var i = -1; while (++i < n) {streams[i].polygonStart(); }},
      polygonEnd: function() { var i = -1; while (++i < n) {streams[i].polygonEnd(); }}
    };
  }

  // A composite projection for Chile, configured by default for 960×500.
  function transverseMercatorChile() {
    var cache,
        cacheStream,
        mainland = d3Geo.geoTransverseMercator().rotate([72, 37]), mainlandPoint,
        antarctic = d3Geo.geoStereographic().rotate([72, 0]), antarcticPoint,
        juanFernandez = d3Geo.geoMercator().rotate([80, 33.5]), juanFernandezPoint,
        pascua = d3Geo.geoMercator().rotate([110, 25]), pascuaPoint,

        point, pointStream = {point: function(x, y) { point = [x, y]; }};

      /*
      var mainlandBbox = [[-75.5, -15.0], [-32, -49.0]];
      var antarcticBbox = [[-91.0, -60.0], [-43.0, -90.0]];
      var juanFernandezBbox = [[-81.0, -33.0], [-78.5, -34.0]];
      var pascuaBbox = [[-110, -26.6], [-108.7, -27.5]];
      */

    function transverseMercatorChile(coordinates) {
      var x = coordinates[0], y = coordinates[1];
      return point = null,
          (mainlandPoint.point(x, y), point) ||
          (antarcticPoint.point(x, y), point) ||
          (juanFernandezPoint.point(x, y), point) ||
          (pascuaPoint.point(x, y), point);
    }

    transverseMercatorChile.invert = function(coordinates) {
      var k = mainland.scale(),
          t = mainland.translate(),
          x = (coordinates[0] - t[0]) / k,
          y = (coordinates[1] - t[1]) / k;

          /*
          //How are the return values calculated:
          console.info("******");
          var c0 = antarctic(antarcticBbox[0]);
          var x0 = (c0[0] - t[0]) / k;
          var y0 = (c0[1] - t[1]) / k;

          console.info("p0 antarctic", x0 + ' - ' + y0);

          var c1 = antarctic(antarcticBbox[1]);
          var x1 = (c1[0] - t[0]) / k;
          var y1 = (c1[1] - t[1]) / k;

          console.info("p1 antarctic", x1 + ' - ' + y1);

          c0 = juanFernandez(juanFernandezBbox[0]);
          x0 = (c0[0] - t[0]) / k;
          y0 = (c0[1] - t[1]) / k;

          console.info("p0 juanFernandez", x0 + ' - ' + y0);

          c1 = juanFernandez(juanFernandezBbox[1]);
          x1 = (c1[0] - t[0]) / k;
          y1 = (c1[1] - t[1]) / k;

          console.info("p1 juanFernandez", x1 + ' - ' + y1);

          c0 = pascua(pascuaBbox[0]);
          x0 = (c0[0] - t[0]) / k;
          y0 = (c0[1] - t[1]) / k;

          console.info("p0 pascua", x0 + ' - ' + y0);

          c1 = pascua(pascuaBbox[1]);
          x1 = (c1[0] - t[0]) / k;
          y1 = (c1[1] - t[1]) / k;

          console.info("p1 pascua", x1 + ' - ' + y1);
          */

          return (y >= 0.2582 && y< 0.32 && x >= -0.1036 && x < -0.087 ? antarctic
              : y >= -0.01298 && y< 0.0133 && x >= -0.11396 && x < -0.05944 ? juanFernandez
              : y >= 0.01539 && y< 0.03911 && x >= -0.089 && x < -0.0588 ? pascua
              : mainland).invert(coordinates);
    };

    transverseMercatorChile.stream = function(stream) {
      return cache && cacheStream === stream ? cache : cache = multiplex$5([mainland.stream(cacheStream = stream), antarctic.stream(stream), juanFernandez.stream(stream), pascua.stream(stream)]);
    };

    transverseMercatorChile.precision = function(_) {
      if (!arguments.length) {return mainland.precision();}
      mainland.precision(_);
      antarctic.precision(_);
      juanFernandez.precision(_);
      pascua.precision(_);
      return transverseMercatorChile;
    };

    transverseMercatorChile.scale = function(_) {
      if (!arguments.length) {return mainland.scale();}
      mainland.scale(_);
      antarctic.scale(_ * 0.15);
      juanFernandez.scale(_ * 1.5);
      pascua.scale(_ * 1.5);
      return transverseMercatorChile.translate(mainland.translate());
    };

    transverseMercatorChile.translate = function(_) {
      if (!arguments.length) {return mainland.translate();}
      var k = mainland.scale(), x = +_[0], y = +_[1];

      /*
      var c0 = mainland(mainlandBbox[0]);
     var x0 = (x - c0[0]) / k;
     var y0 = (y - c0[1]) / k;

     var c1 = mainland(mainlandBbox[1]);
     var x1 = (x - c1[0]) / k;
     var y1 = (y - c1[1]) / k;

     console.info('Mainland: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
     console.info('.clipExtent([[x '+
      (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
      ' * k, y '+
      (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
      ' * k],[x '+
      (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
      ' * k, y '+
      (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
      ' * k]])');

     c0 = antarctic.translate([x - 0.1 * k, y + 0.17 * k])(antarcticBbox[0]);
     x0 = (x - c0[0]) / k;
     y0 = (y - c0[1]) / k;

     c1 = antarctic.translate([x - 0.1 * k, y + 0.17 * k])(antarcticBbox[1]);
     x1 = (x - c1[0]) / k;
     y1 = (y - c1[1]) / k;

     console.info('antarctic: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
     console.info('Doesn t work due to -90 latitude!' + '.clipExtent([[x '+
      (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
      ' * k + epsilon, y '+
      (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
      ' * k + epsilon],[x '+
      (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
      ' * k - epsilon, y '+
      (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
      ' * k - epsilon]])');

      c0 = juanFernandez.translate([x - 0.092 * k, y -0 * k])(juanFernandezBbox[0]);
      x0 = (x - c0[0]) / k;
      y0 = (y - c0[1]) / k;

      c1 = juanFernandez.translate([x - 0.092 * k, y -0 * k])(juanFernandezBbox[1]);
      x1 = (x - c1[0]) / k;
      y1 = (y - c1[1]) / k;

      console.info('juanFernandez: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
      console.info('.clipExtent([[x '+
       (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
       ' * k + epsilon, y '+
       (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
       ' * k + epsilon],[x '+
       (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
       ' * k - epsilon, y '+
       (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
       ' * k - epsilon]])');

       c0 = pascua.translate([x - 0.089 * k, y -0.0265 * k])(pascuaBbox[0]);
       x0 = (x - c0[0]) / k;
       y0 = (y - c0[1]) / k;

       c1 = pascua.translate([x - 0.089 * k, y -0.0265 * k])(pascuaBbox[1]);
       x1 = (x - c1[0]) / k;
       y1 = (y - c1[1]) / k;

       console.info('pascua: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
       console.info('.clipExtent([[x '+
        (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
        ' * k + epsilon, y '+
        (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
        ' * k + epsilon],[x '+
        (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
        ' * k - epsilon, y '+
        (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
        ' * k - epsilon]])');
        */
      mainlandPoint = mainland
          .translate(_)
          .clipExtent([[x - 0.059 * k, y - 0.3835 * k],[x + 0.4498 * k, y + 0.3375 * k]])
          .stream(pointStream);

      antarcticPoint = antarctic
          .translate([x - 0.087 * k, y + 0.17 * k])
          .clipExtent([[x - 0.1166 * k + epsilon, y + 0.2582 * k + epsilon],[x - 0.06 * k - epsilon, y + 0.32 * k - epsilon]])
          .stream(pointStream);

      juanFernandezPoint = juanFernandez
          .translate([x - 0.092 * k, y - 0 * k])
          .clipExtent([[x - 0.114 * k + epsilon, y - 0.013 * k + epsilon],[x - 0.0594 * k - epsilon, y + 0.0133 * k - epsilon]])
          .stream(pointStream);

      pascuaPoint = pascua
          .translate([x - 0.089 * k, y - 0.0265 * k])
          .clipExtent([[x - 0.089 * k + epsilon, y + 0.0154 * k + epsilon],[x - 0.0588 * k - epsilon, y + 0.0391 * k - epsilon]])
          .stream(pointStream);

      return transverseMercatorChile;
    };

    transverseMercatorChile.drawCompositionBorders = function(context) {
      /*
      console.info("CLIP EXTENT antarctic: ", antarctic.clipExtent());
      console.info("UL BBOX:", mainland.invert([antarctic.clipExtent()[0][0], antarctic.clipExtent()[0][1]]));
      console.info("UR BBOX:", mainland.invert([antarctic.clipExtent()[1][0], antarctic.clipExtent()[0][1]]));
      console.info("LD BBOX:", mainland.invert([antarctic.clipExtent()[1][0], antarctic.clipExtent()[1][1]]));
      console.info("LL BBOX:", mainland.invert([antarctic.clipExtent()[0][0], antarctic.clipExtent()[1][1]]));

      console.info("CLIP EXTENT juanFernandez: ", juanFernandez.clipExtent());
      console.info("UL BBOX:", mainland.invert([juanFernandez.clipExtent()[0][0], juanFernandez.clipExtent()[0][1]]));
      console.info("UR BBOX:", mainland.invert([juanFernandez.clipExtent()[1][0], juanFernandez.clipExtent()[0][1]]));
      console.info("LD BBOX:", mainland.invert([juanFernandez.clipExtent()[1][0], juanFernandez.clipExtent()[1][1]]));
      console.info("LL BBOX:", mainland.invert([juanFernandez.clipExtent()[0][0], juanFernandez.clipExtent()[1][1]]));

      console.info("CLIP EXTENT pascua: ", pascua.clipExtent());
      console.info("UL BBOX:", mainland.invert([pascua.clipExtent()[0][0], pascua.clipExtent()[0][1]]));
      console.info("UR BBOX:", mainland.invert([pascua.clipExtent()[1][0], pascua.clipExtent()[0][1]]));
      console.info("LD BBOX:", mainland.invert([pascua.clipExtent()[1][0], pascua.clipExtent()[1][1]]));
      console.info("LL BBOX:", mainland.invert([pascua.clipExtent()[0][0], pascua.clipExtent()[1][1]]));
      */

      var ulantarctic = mainland([-82.6999, -51.3043]);
      var urantarctic = mainland([-77.5442, -51.6631]);
      var ldantarctic = mainland([-78.0254, -55.1860]);
      var llantarctic = mainland([-83.6106, -54.7785]);

      var uljuanFernandez = mainland([-80.0638, -35.9840]);
      var urjuanFernandez = mainland([-76.2153, -36.1811]);
      var ldjuanFernandez = mainland([-76.2994, -37.6839]);
      var lljuanFernandez = mainland([-80.2231, -37.4757]);

      var ulpascua = mainland([-78.442, -37.706]);
      var urpascua = mainland([-76.263, -37.8054]);
      var ldpascua = mainland([-76.344, -39.1595]);
      var llpascua = mainland([-78.5638, -39.0559]);

      context.moveTo(ulantarctic[0], ulantarctic[1]);
      context.lineTo(urantarctic[0], urantarctic[1]);
      context.lineTo(ldantarctic[0], ldantarctic[1]);
      context.lineTo(ldantarctic[0], ldantarctic[1]);
      context.lineTo(llantarctic[0], llantarctic[1]);
      context.closePath();

      context.moveTo(uljuanFernandez[0], uljuanFernandez[1]);
      context.lineTo(urjuanFernandez[0], urjuanFernandez[1]);
      context.lineTo(ldjuanFernandez[0], ldjuanFernandez[1]);
      context.lineTo(ldjuanFernandez[0], ldjuanFernandez[1]);
      context.lineTo(lljuanFernandez[0], lljuanFernandez[1]);
      context.closePath();

      context.moveTo(ulpascua[0], ulpascua[1]);
      context.lineTo(urpascua[0], urpascua[1]);
      context.lineTo(ldpascua[0], ldpascua[1]);
      context.lineTo(ldpascua[0], ldpascua[1]);
      context.lineTo(llpascua[0], llpascua[1]);
      context.closePath();


    };
    transverseMercatorChile.getCompositionBorders = function() {
      var context = d3Path.path();
      this.drawCompositionBorders(context);
      return context.toString();
    };

    return transverseMercatorChile.scale(700);
  }

  // The projections must have mutually exclusive clip regions on the sphere,
  // as this will avoid emitting interleaving lines and polygons.
  function multiplex$6(streams) {
    var n = streams.length;
    return {
      point: function(x, y) { var i = -1; while (++i < n) {streams[i].point(x, y); }},
      sphere: function() { var i = -1; while (++i < n) {streams[i].sphere(); }},
      lineStart: function() { var i = -1; while (++i < n) {streams[i].lineStart(); }},
      lineEnd: function() { var i = -1; while (++i < n) {streams[i].lineEnd(); }},
      polygonStart: function() { var i = -1; while (++i < n) {streams[i].polygonStart(); }},
      polygonEnd: function() { var i = -1; while (++i < n) {streams[i].polygonEnd(); }}
    };
  }

  // A composite projection for Portugal, configured by default for 960×500.
  function conicEquidistantJapan() {
    var cache,
        cacheStream,
        mainland = d3Geo.geoConicEquidistant().rotate([-136, -22]).parallels([40, 34]), mainlandPoint, //gis.stackexchange.com/a/73135
        hokkaido = d3Geo.geoConicEquidistant().rotate([-146, -26]).parallels([40, 34]), hokkaidoPoint,
        okinawa = d3Geo.geoConicEquidistant().rotate([-126, -19]).parallels([40, 34]), okinawaPoint,

        point, pointStream = {point: function(x, y) { point = [x, y]; }};

        /*
        var mainlandBbox = [[126.0, 41.606], [142.97, 29.97]];
        var hokkaidoBbox = [[138.7, 45.61], [146.2, 41.2]];
        var okinawaBbox = [[122.6, 29.0], [130, 23.7]];
        */


    function conicEquidistantJapan(coordinates) {
      var x = coordinates[0], y = coordinates[1];
      return point = null,
          (mainlandPoint.point(x, y), point) ||
          (hokkaidoPoint.point(x, y), point) ||
          (okinawaPoint.point(x, y), point);
    }

    conicEquidistantJapan.invert = function(coordinates) {
      var k = mainland.scale(),
          t = mainland.translate(),
          x = (coordinates[0] - t[0]) / k,
          y = (coordinates[1] - t[1]) / k;

          /*
          //How are the return values calculated:
          console.info("******");
          var c0 = hokkaido(hokkaidoBbox[0]);
          var x0 = (c0[0] - t[0]) / k;
          var y0 = (c0[1] - t[1]) / k;

          console.info("p0 hokkaido", x0 + ' - ' + y0);

          var c1 = hokkaido(hokkaidoBbox[1]);
          var x1 = (c1[0] - t[0]) / k;
          var y1 = (c1[1] - t[1]) / k;

          console.info("p1 hokkaido", x1 + ' - ' + y1);

          c0 = okinawa(okinawaBbox[0]);
          x0 = (c0[0] - t[0]) / k;
          y0 = (c0[1] - t[1]) / k;

          console.info("p0 okinawa", x0 + ' - ' + y0);

          c1 = okinawa(okinawaBbox[1]);
          x1 = (c1[0] - t[0]) / k;
          y1 = (c1[1] - t[1]) / k;

          console.info("p1 okinawa", x1 + ' - ' + y1);
          */

          return (y >= -0.10925 && y< -0.02701 && x >= -0.135 && x < -0.0397 ? hokkaido
              : y >= 0.04713 && y< 0.11138 && x >= -0.03986 && x < 0.051 ? okinawa
              : mainland).invert(coordinates);

    };

    conicEquidistantJapan.stream = function(stream) {
      return cache && cacheStream === stream ? cache : cache = multiplex$6([mainland.stream(cacheStream = stream), hokkaido.stream(stream), okinawa.stream(stream)]);
    };

    conicEquidistantJapan.precision = function(_) {
      if (!arguments.length) {return mainland.precision();}
      mainland.precision(_);
      hokkaido.precision(_);
      okinawa.precision(_);
      return conicEquidistantJapan;
    };

    conicEquidistantJapan.scale = function(_) {
      if (!arguments.length) {return mainland.scale();}
      mainland.scale(_);
      hokkaido.scale(_);
      okinawa.scale(_ * 0.7);
      return conicEquidistantJapan.translate(mainland.translate());
    };

    conicEquidistantJapan.translate = function(_) {
      if (!arguments.length) {return mainland.translate();}
      var k = mainland.scale(), x = +_[0], y = +_[1];

      /*
      var c0 = mainland(mainlandBbox[0]);
     var x0 = (x - c0[0]) / k;
     var y0 = (y - c0[1]) / k;

     var c1 = mainland(mainlandBbox[1]);
     var x1 = (x - c1[0]) / k;
     var y1 = (y - c1[1]) / k;

     console.info('Main: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
     console.info('.clipExtent([[x '+
      (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
      ' * k, y '+
      (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
      ' * k],[x '+
      (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
      ' * k, y '+
      (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
      ' * k]])');

     c0 = hokkaido.translate([x - 0.0425 * k, y - 0.005 * k])(hokkaidoBbox[0]);
     x0 = (x - c0[0]) / k;
     y0 = (y - c0[1]) / k;

     c1 = hokkaido.translate([x - 0.0425 * k, y - 0.005 * k])(hokkaidoBbox[1]);
     x1 = (x - c1[0]) / k;
     y1 = (y - c1[1]) / k;

     console.info('hokkaido: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
     console.info('.clipExtent([[x '+
      (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
      ' * k + epsilon, y '+
      (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
      ' * k + epsilon],[x '+
      (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
      ' * k - epsilon, y '+
      (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
      ' * k - epsilon]])');

      c0 = okinawa.translate([x - 0 * k, y + 0 * k])(okinawaBbox[0]);
      x0 = (x - c0[0]) / k;
      y0 = (y - c0[1]) / k;

      c1 = okinawa.translate([x - 0 * k, y + 0 * k])(okinawaBbox[1]);
      x1 = (x - c1[0]) / k;
      y1 = (y - c1[1]) / k;

      console.info('okinawa: p0: ' + x0 + ', ' + y0 + ' , p1: ' + x1 + ' - ' + y1);
      console.info('.clipExtent([[x '+
       (x0<0?'+ ':'- ') + Math.abs(x0.toFixed(4))+
       ' * k + epsilon, y '+
       (y0<0?'+ ':'- ') + Math.abs(y0.toFixed(4))+
       ' * k + epsilon],[x '+
       (x1<0?'+ ':'- ') + Math.abs(x1.toFixed(4))+
       ' * k - epsilon, y '+
       (y1<0?'+ ':'- ') + Math.abs(y1.toFixed(4))+
       ' * k - epsilon]])');
       */

      mainlandPoint = mainland
          .translate(_)
          .clipExtent([[x - 0.1352 * k, y - 0.1091 * k],[x + 0.117 * k, y + 0.098 * k]])
          .stream(pointStream);


      hokkaidoPoint = hokkaido
          .translate([x - 0.0425 * k, y - 0.005 * k])
          .clipExtent([[x - 0.135 * k + epsilon, y - 0.1093 * k + epsilon],[x - 0.0397 * k - epsilon, y - 0.027 * k - epsilon]])
          .stream(pointStream);

      okinawaPoint = okinawa
          .translate(_)
          .clipExtent([[x - 0.0399 * k + epsilon, y + 0.0471 * k + epsilon],[x + 0.051 * k - epsilon, y + 0.1114 * k - epsilon]])
          .stream(pointStream);

      return conicEquidistantJapan;
    };

    conicEquidistantJapan.drawCompositionBorders = function(context) {
      /*
      console.info("CLIP EXTENT hokkaido: ", hokkaido.clipExtent());
      console.info("UL BBOX:", mainland.invert([hokkaido.clipExtent()[0][0], hokkaido.clipExtent()[0][1]]));
      console.info("UR BBOX:", mainland.invert([hokkaido.clipExtent()[1][0], hokkaido.clipExtent()[0][1]]));
      console.info("LD BBOX:", mainland.invert([hokkaido.clipExtent()[1][0], hokkaido.clipExtent()[1][1]]));
      console.info("LL BBOX:", mainland.invert([hokkaido.clipExtent()[0][0], hokkaido.clipExtent()[1][1]]));
      */

      var ulhokkaido = mainland([ 126.01320483689143, 41.621090310215585 ]);
      var urhokkaido = mainland([ 133.04304387025903, 42.15087523707186 ]);
      var ldhokkaido = mainland([ 133.3021766080688, 37.43975444725098 ]);
      var llhokkaido = mainland([ 126.87889168628224, 36.95488945159779 ]);

      var llokinawa = mainland([132.9, 29.8]);
      var lmokinawa = mainland([134, 33]);
      var lrokinawa = mainland([139.3, 33.2]);
      var llrokinawa = mainland([139.16, 30.5]);


      context.moveTo(ulhokkaido[0], ulhokkaido[1]);
      context.lineTo(urhokkaido[0], urhokkaido[1]);
      context.lineTo(ldhokkaido[0], ldhokkaido[1]);
      context.lineTo(llhokkaido[0], llhokkaido[1]);
      context.closePath();

      context.moveTo(llokinawa[0], llokinawa[1]);
      context.lineTo(lmokinawa[0], lmokinawa[1]);
      context.lineTo(lrokinawa[0], lrokinawa[1]);
      context.lineTo(llrokinawa[0], llrokinawa[1]);

    };
    conicEquidistantJapan.getCompositionBorders = function() {
      var context = d3Path.path();
      this.drawCompositionBorders(context);
      return context.toString();
    };

    return conicEquidistantJapan.scale(2200);
  }

  // The projections must have mutually exclusive clip regions on the sphere,
  // as this will avoid emitting interleaving lines and polygons.
  function multiplex$7(streams) {
    var n = streams.length;
    return {
      point: function(x, y) { var i = -1; while (++i < n) {streams[i].point(x, y); }},
      sphere: function() { var i = -1; while (++i < n) {streams[i].sphere(); }},
      lineStart: function() { var i = -1; while (++i < n) {streams[i].lineStart(); }},
      lineEnd: function() { var i = -1; while (++i < n) {streams[i].lineEnd(); }},
      polygonStart: function() { var i = -1; while (++i < n) {streams[i].polygonStart(); }},
      polygonEnd: function() { var i = -1; while (++i < n) {streams[i].polygonEnd(); }}
    };
  }

  // A composite projection for Portugal, configured by default for 960×500.
  function conicConformalFrance() {
    var cache,
        cacheStream,
        europe = d3Geo.geoConicConformal().rotate([-3, -46.2]).parallels([0, 60]), europePoint,
        guyane = d3Geo.geoMercator().center([-53.2, 3.9]), guyanePoint,
        martinique = d3Geo.geoMercator().center([-61.03, 14.67]), martiniquePoint,
        guadeloupe = d3Geo.geoMercator().center([-61.46, 16.14]), guadeloupePoint,
        saintBarthlemy = d3Geo.geoMercator().center([-62.85, 17.92]), saintBarthlemyPoint,
        stPierreMichelon = d3Geo.geoMercator().center([-56.23, 46.93]), stPierreMichelonPoint,
        mayotte = d3Geo.geoMercator().center([45.16, -12.8]), mayottePoint,
        reunion = d3Geo.geoMercator().center([55.52, -21.13]), reunionPoint,
        nouvelleCaledonie = d3Geo.geoMercator().center([165.8, -21.07]), nouvelleCaledoniePoint,
        wallisFutuna = d3Geo.geoMercator().center([-178.1, -14.3]), wallisFutunaPoint,
        polynesie = d3Geo.geoMercator().center([-150.55, -17.11]), polynesiePoint,
        polynesie2 = d3Geo.geoMercator().center([-150.55, -17.11]), polynesie2Point,
        point, pointStream = {point: function(x, y) { point = [x, y]; }};

        /*
        var europeBbox = [[-6.5, 51], [10, 41]];
        var guyaneBbox = [[-54.5, 6.29], [-50.9, 1.48]];
        */


    function conicConformalFrance(coordinates) {
      var x = coordinates[0], y = coordinates[1];
      return point = null,
          (europePoint.point(x, y), point) ||
          (guyanePoint.point(x, y), point) ||
          (martiniquePoint.point(x, y), point) ||
          (guadeloupePoint.point(x, y), point) ||
          (saintBarthlemyPoint.point(x, y), point) ||
          (stPierreMichelonPoint.point(x, y), point) ||
          (mayottePoint.point(x, y), point) ||
          (reunionPoint.point(x, y), point) ||
          (nouvelleCaledoniePoint.point(x, y), point) ||
          (wallisFutunaPoint.point(x, y), point) ||
          (polynesiePoint.point(x, y), point) ||
          (polynesie2Point.point(x, y), point);
    }

    conicConformalFrance.invert = function(coordinates) {
      var k = europe.scale(),
          t = europe.translate(),
          x = (coordinates[0] - t[0]) / k,
          y = (coordinates[1] - t[1]) / k;

          return (y >= 0.029 && y< 0.0864 && x >= -0.14 && x < -0.0996 ? guyane
              : y >= 0 && y< 0.029 && x >= -0.14 && x < -0.0996 ? martinique
              : y >= -0.032 && y< 0 && x >= -0.14 && x < -0.0996 ? guadeloupe
              : y >= -0.052 && y< -0.032 && x >= -0.14 && x < -0.0996 ? saintBarthlemy
              : y >= -0.076 && y< 0.052 && x >= -0.14 && x < -0.0996 ? stPierreMichelon
              : y >= -0.076 && y< -0.052 && x >= 0.0967 && x < 0.1371 ? mayotte
              : y >= -0.052 && y< -0.02 && x >= 0.0967 && x < 0.1371 ? reunion
              : y >= -0.02 && y< 0.012 && x >= 0.0967 && x < 0.1371 ? nouvelleCaledonie
              : y >= 0.012 && y< 0.033 && x >= 0.0967 && x < 0.1371 ? wallisFutuna
              : y >= 0.033 && y< 0.0864 && x >= 0.0967 && x < 0.1371 ? polynesie
              : europe).invert(coordinates);
    };

    conicConformalFrance.stream = function(stream) {
      return cache && cacheStream === stream ? cache : cache = multiplex$7([europe.stream(cacheStream = stream), guyane.stream(stream), martinique.stream(stream), guadeloupe.stream(stream), saintBarthlemy.stream(stream), stPierreMichelon.stream(stream), mayotte.stream(stream), reunion.stream(stream), nouvelleCaledonie.stream(stream), wallisFutuna.stream(stream), polynesie.stream(stream), polynesie2.stream(stream)]);
    };

    conicConformalFrance.precision = function(_) {
      if (!arguments.length) {return europe.precision();}
      europe.precision(_);
      guyane.precision(_);
      martinique.precision(_);
      guadeloupe.precision(_);
      saintBarthlemy.precision(_);
      stPierreMichelon.precision(_);
      mayotte.precision(_);
      reunion.precision(_);
      nouvelleCaledonie.precision(_);
      wallisFutuna.precision(_);
      polynesie.precision(_);
      polynesie2.precision(_);
      return conicConformalFrance;
    };

    conicConformalFrance.scale = function(_) {
      if (!arguments.length) {return europe.scale();}
      europe.scale(_);
      guyane.scale(_ * 0.6);
      martinique.scale(_ * 1.6);
      guadeloupe.scale(_ * 1.4);
      saintBarthlemy.scale(_ * 5);
      stPierreMichelon.scale(_ * 1.3);
      mayotte.scale(_ * 1.6);
      reunion.scale(_ * 1.2);
      nouvelleCaledonie.scale(_ * 0.3);
      wallisFutuna.scale(_ * 2.7);
      polynesie.scale(_ * 0.5);
      polynesie2.scale(_ * 0.06);
      return conicConformalFrance.translate(europe.translate());
    };

    conicConformalFrance.translate = function(_) {
      if (!arguments.length) {return europe.translate();}
      var k = europe.scale(), x = +_[0], y = +_[1];

      europePoint = europe
          .translate(_)
          .clipExtent([[x - 0.0996 * k, y - 0.0908 * k],[x + 0.0967 * k, y + 0.0864 * k]])
          .stream(pointStream);


      guyanePoint = guyane
          .translate([x - 0.12 * k, y + 0.0575 * k])
          .clipExtent([[x - 0.14 * k + epsilon, y + 0.029 * k + epsilon],[x - 0.0996 * k - epsilon, y + 0.0864 * k - epsilon]])
          .stream(pointStream);

      martiniquePoint = martinique
          .translate([x - 0.12 * k, y + 0.013 * k])
          .clipExtent([[x - 0.14 * k + epsilon, y + 0 * k + epsilon],[x - 0.0996 * k - epsilon, y + 0.029 * k - epsilon]])
          .stream(pointStream);

      guadeloupePoint = guadeloupe
          .translate([x - 0.12 * k, y -0.014 * k])
          .clipExtent([[x - 0.14 * k + epsilon, y - 0.032 * k + epsilon],[x - 0.0996 * k - epsilon, y + 0 * k - epsilon]])
          .stream(pointStream);

      saintBarthlemyPoint = saintBarthlemy
          .translate([x - 0.12 * k, y - 0.044 * k])
          .clipExtent([[x - 0.14 * k + epsilon, y - 0.052 * k + epsilon],[x - 0.0996 * k - epsilon, y - 0.032 * k - epsilon]])
          .stream(pointStream);

      stPierreMichelonPoint = stPierreMichelon
          .translate([x - 0.12 * k, y - 0.065 * k])
          .clipExtent([[x - 0.14 * k + epsilon, y - 0.076 * k + epsilon],[x - 0.0996 * k - epsilon, y - 0.052 * k - epsilon]])
          .stream(pointStream);

      mayottePoint = mayotte
          .translate([x + 0.117 * k, y - 0.064 * k])
          .clipExtent([[x + 0.0967 * k + epsilon, y - 0.076 * k + epsilon],[x + 0.1371 * k - epsilon, y - 0.052 * k - epsilon]])
          .stream(pointStream);

      reunionPoint = reunion
          .translate([x + 0.116 * k, y - 0.0355 * k])
          .clipExtent([[x + 0.0967 * k + epsilon, y - 0.052 * k + epsilon],[x + 0.1371 * k - epsilon, y - 0.02 * k - epsilon]])
          .stream(pointStream);

      nouvelleCaledoniePoint = nouvelleCaledonie
          .translate([x + 0.116 * k, y - 0.0048 * k])
          .clipExtent([[x + 0.0967 * k + epsilon, y - 0.02 * k + epsilon],[x + 0.1371 * k - epsilon, y + 0.012 * k - epsilon]])
          .stream(pointStream);

      wallisFutunaPoint = wallisFutuna
          .translate([x + 0.116 * k, y + 0.022 * k])
          .clipExtent([[x + 0.0967 * k + epsilon, y + 0.012 * k + epsilon],[x + 0.1371 * k - epsilon, y + 0.033 * k - epsilon]])
          .stream(pointStream);

      polynesie2Point = polynesie2
          .translate([x + 0.11 * k, y + 0.045 * k])
          .clipExtent([[x + 0.0967 * k + epsilon, y + 0.033 * k + epsilon],[x + 0.1371 * k - epsilon, y  + 0.06 * k - epsilon]])
          .stream(pointStream);

      polynesiePoint = polynesie
          .translate([x + 0.115 * k, y + 0.075 * k])
          .clipExtent([[x + 0.0967 * k + epsilon, y + 0.06 * k + epsilon],[x + 0.1371 * k - epsilon, y  + 0.0864 * k - epsilon]])
          .stream(pointStream);



      return conicConformalFrance;
    };

    conicConformalFrance.drawCompositionBorders = function(context) {

      /*
      console.log("var ul, ur, ld, ll;");
      var projs = [guyane, martinique, guadeloupe, saintBarthlemy, stPierreMichelon, mayotte, reunion, nouvelleCaledonie, wallisFutuna, polynesie, polynesie2];
      for (var i in projs){
        var ul = europe.invert([projs[i].clipExtent()[0][0], projs[i].clipExtent()[0][1]]);
        var ur = europe.invert([projs[i].clipExtent()[1][0], projs[i].clipExtent()[0][1]]);
        var ld = europe.invert([projs[i].clipExtent()[1][0], projs[i].clipExtent()[1][1]]);
        var ll = europe.invert([projs[i].clipExtent()[0][0], projs[i].clipExtent()[1][1]]);

        console.log("ul = europe(["+ul+"]);");
        console.log("ur = europe(["+ur+"]);");
        console.log("ld = europe(["+ld+"]);");
        console.log("ll = europe(["+ll+"]);");

        console.log("context.moveTo(ul[0], ul[1]);");
        console.log("context.lineTo(ur[0], ur[1]);");
        console.log("context.lineTo(ld[0], ld[1]);");
        console.log("context.lineTo(ll[0], ll[1]);");
        console.log("context.closePath();");

      }*/

      var ul, ur, ld, ll;
      ul = europe([-7.938886725111036,43.7219460918835]);
      ur = europe([-4.832080896458295,44.12930268549372]);
      ld = europe([-4.205299743793263,40.98096346967365]);
      ll = europe([-7.071796453126152,40.610037319181444]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([-8.42751373617692,45.32889452553031]);
      ur = europe([-5.18599305777107,45.7566442062976]);
      ld = europe([-4.832080905154431,44.129302726751426]);
      ll = europe([-7.938886737126192,43.72194613263854]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([-9.012656899657046,47.127733821030176]);
      ur = europe([-5.6105244772793155,47.579777861410626]);
      ld = europe([-5.185993067168585,45.756644248170346]);
      ll = europe([-8.427513749141811,45.32889456686326]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([-9.405747558985553,48.26506375557457]);
      ur = europe([-5.896175018439575,48.733352850851624]);
      ld = europe([-5.610524487556043,47.57977790393761]);
      ll = europe([-9.012656913808351,47.127733862971255]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([-9.908436061346974,49.642448789505856]);
      ur = europe([-6.262026716233124,50.131426841787174]);
      ld = europe([-5.896175029331232,48.73335289377258]);
      ll = europe([-9.40574757396393,48.26506379787767]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([11.996907706504462,50.16039028163579]);
      ur = europe([15.649907879773343,49.68279246765253]);
      ld = europe([15.156712840526632,48.30371557625831]);
      ll = europe([11.64122661754411,48.761078240546816]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([11.641226606955788,48.7610781975889]);
      ur = europe([15.156712825832164,48.30371553390465]);
      ld = europe([14.549932166241172,46.4866532486199]);
      ll = europe([11.204443787952183,46.91899233914248]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([11.204443778297161,46.918992296823646]);
      ur = europe([14.549932152815039,46.486653206856396]);
      ld = europe([13.994409796764009,44.695833444323256]);
      ll = europe([10.805306599253848,45.105133870684924]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([10.805306590412085,45.10513382903308]);
      ur = europe([13.99440978444733,44.695833403183606]);
      ld = europe([13.654633799024392,43.53552468558152]);
      ll = europe([10.561516803980956,43.930671459798624]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();

      ul = europe([10.561516795617383,43.93067141859757]);
      ur = europe([13.654633787361952,43.5355246448671]);
      ld = europe([12.867691604239901,40.640701985019405]);
      ll = europe([9.997809515987688,41.00288343254471]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();

      ul = europe([10.8,42.4]);
      ur = europe([12.8,42.13]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);

    };
    conicConformalFrance.getCompositionBorders = function() {
      var context = d3Path.path();
      this.drawCompositionBorders(context);
      return context.toString();
    };

    return conicConformalFrance.scale(2700);
  }

  // The projections must have mutually exclusive clip regions on the sphere,
  // as this will avoid emitting interleaving lines and polygons.
  function multiplex$8(streams) {
    var n = streams.length;
    return {
      point: function(x, y) { var i = -1; while (++i < n) {streams[i].point(x, y); }},
      sphere: function() { var i = -1; while (++i < n) {streams[i].sphere(); }},
      lineStart: function() { var i = -1; while (++i < n) {streams[i].lineStart(); }},
      lineEnd: function() { var i = -1; while (++i < n) {streams[i].lineEnd(); }},
      polygonStart: function() { var i = -1; while (++i < n) {streams[i].polygonStart(); }},
      polygonEnd: function() { var i = -1; while (++i < n) {streams[i].polygonEnd(); }}
    };
  }

  // A composite projection for Portugal, configured by default for 960×500.
  function conicConformalEurope() {
    var cache,
        cacheStream,
        europe = d3Geo.geoConicConformal().rotate([-10, -53]).parallels([0, 60]), europePoint,
        guadeloupe = d3Geo.geoMercator().center([-61.46, 16.14]), guadeloupePoint,
        guyane = d3Geo.geoMercator().center([-53.2, 3.9]), guyanePoint,
        azores = d3Geo.geoConicConformal().rotate([27.8, -38.9]).parallels([0, 60]), azoresPoint,
        azores2 = d3Geo.geoConicConformal().rotate([25.43, -37.398]).parallels([0, 60]), azores2Point,
        azores3 = d3Geo.geoConicConformal().rotate([31.17, -39.539]).parallels([0, 60]), azores3Point,
        madeira = d3Geo.geoConicConformal().rotate([17, -32.7]).parallels([0, 60]), madeiraPoint,
        canaryIslands = d3Geo.geoConicConformal().rotate([16, -28.5]).parallels([0,60]), canaryIslandsPoint,
        martinique = d3Geo.geoMercator().center([-61.03, 14.67]), martiniquePoint,
        mayotte = d3Geo.geoMercator().center([45.16, -12.8]), mayottePoint,
        reunion = d3Geo.geoMercator().center([55.52, -21.13]), reunionPoint,
        malta = d3Geo.geoConicConformal().rotate([-14.4, -35.95]).parallels([0, 60]), maltaPoint,
                  
        
        
        
        
        point, pointStream = {point: function(x, y) { point = [x, y]; }};

        /*
        var europeBbox = [[-6.5, 51], [10, 41]];
        var guyaneBbox = [[-54.5, 6.29], [-50.9, 1.48]];
        */


    function conicConformalEurope(coordinates) {
      var x = coordinates[0], y = coordinates[1];
      return point = null,
          (europePoint.point(x, y), point) ||
          (guyanePoint.point(x, y), point) ||
          (martiniquePoint.point(x, y), point) ||
          (guadeloupePoint.point(x, y), point) ||
          (canaryIslandsPoint.point(x, y), point) ||
          (madeiraPoint.point(x, y), point) ||
          (mayottePoint.point(x, y), point) ||
          (reunionPoint.point(x, y), point) ||
          (maltaPoint.point(x, y), point) ||
          (azoresPoint.point(x, y), point) ||
          (azores2Point.point(x, y), point) ||
          (azores3Point.point(x, y), point);
    }

    conicConformalEurope.invert = function(coordinates) {
      var k = europe.scale(),
          t = europe.translate(),
          x = (coordinates[0] - (t[0] + 0.08 * k)) / k,
          y = (coordinates[1] - t[1]) / k;

          return (y >= -0.31 && y< -0.24 && x >= 0.14 && x < 0.24 ? guadeloupe
              : y >= -0.24 && y< -0.17 && x >= 0.14 && x < 0.24 ? guyane
              : y >= -0.17 && y< -0.12 && x >= 0.21 && x < 0.24 ? azores2
              : y >= -0.17 && y< -0.14 && x >= 0.14 && x < 0.165 ? azores3
              : y >= -0.17 && y< -0.1 && x >= 0.14 && x < 0.24 ? azores
              : y >= -0.1 && y< -0.03 && x >= 0.14 && x < 0.24 ? madeira
              : y >= -0.03 && y< 0.04 && x >= 0.14 && x < 0.24 ? canaryIslands
              : y >= -0.31 && y< -0.24 && x >= 0.24 && x < 0.34 ? martinique
              : y >= -0.24 && y< -0.17 && x >= 0.24 && x < 0.34 ? mayotte
              : y >= -0.17 && y< -0.1 && x >= 0.24 && x < 0.34 ? reunion
              : y >= -0.1 && y< -0.03 && x >= 0.24 && x < 0.34 ? malta
              : europe).invert(coordinates);

    };

    conicConformalEurope.stream = function(stream) {
      return cache && cacheStream === stream ? cache : cache = multiplex$8([europe.stream(cacheStream = stream), guyane.stream(stream), martinique.stream(stream), guadeloupe.stream(stream), canaryIslands.stream(stream), madeira.stream(stream), mayotte.stream(stream), reunion.stream(stream), malta.stream(stream), azores.stream(stream), azores2.stream(stream), azores3.stream(stream)]);
    };

    conicConformalEurope.precision = function(_) {
      if (!arguments.length) {return europe.precision();}
      europe.precision(_);
      guyane.precision(_);
      martinique.precision(_);
      guadeloupe.precision(_);
      canaryIslands.precision(_);
      madeira.precision(_);
      mayotte.precision(_);
      reunion.precision(_);
      malta.precision(_);

      azores.precision(_);
      azores2.precision(_);
      azores3.precision(_);
      return conicConformalEurope;
    };

    conicConformalEurope.scale = function(_) {
      if (!arguments.length) {return europe.scale();}
      europe.scale(_);
      guadeloupe.scale(_ * 3);
      guyane.scale(_ * 0.8);
      martinique.scale(_ * 3.5);
      reunion.scale(_ * 2.7);
      azores.scale(_ * 2);
      azores2.scale(_ * 2);
      azores3.scale(_ * 2);
      madeira.scale(_ * 3);
      canaryIslands.scale(_);
   
      mayotte.scale(_ * 5.5);
      malta.scale(_ * 6);
      
      
      
      return conicConformalEurope.translate(europe.translate());
    };

    conicConformalEurope.translate = function(_) {
      if (!arguments.length) {return europe.translate();}
      var k = europe.scale(), x = +_[0], y = +_[1];

      europePoint = europe
          .translate([x - 0.08 * k, y])
          .clipExtent([[x - 0.51 * k, y - 0.33 * k],[x + 0.5 * k, y + 0.33 * k]])
          .stream(pointStream);
      
      guadeloupePoint = guadeloupe
          .translate([x + 0.19 * k, y - 0.275 * k])
          .clipExtent([[x + 0.14 * k + epsilon, y - 0.31 * k + epsilon],[x + 0.24 * k - epsilon, y - 0.24 * k - epsilon]])
          .stream(pointStream);

      guyanePoint = guyane
          .translate([x + 0.19 * k, y - 0.205 * k])
          .clipExtent([[x + 0.14 * k + epsilon, y - 0.24 * k + epsilon],[x + 0.24 * k - epsilon, y - 0.17 * k - epsilon]])
          .stream(pointStream);

      azoresPoint = azores
          .translate([x + 0.19 * k, y - 0.135 * k])
          .clipExtent([[x + 0.14 * k + epsilon, y - 0.17 * k + epsilon],[x + 0.24 * k - epsilon, y - 0.1 * k - epsilon]])
          .stream(pointStream);

      azores2Point = azores2
          .translate([x + 0.225 * k, y - 0.147 * k])
          .clipExtent([[x + 0.21 * k + epsilon, y - 0.17 * k + epsilon],[x + 0.24 * k - epsilon, y - 0.12 * k - epsilon]])
          .stream(pointStream);

      azores3Point = azores3
          .translate([x + 0.153 * k, y - 0.15 * k])
          .clipExtent([[x + 0.14 * k + epsilon, y - 0.17 * k + epsilon],[x + 0.165 * k - epsilon, y - 0.14 * k - epsilon]])
          .stream(pointStream);        

      madeiraPoint = madeira
          .translate([x + 0.19 * k, y - 0.065 * k])
          .clipExtent([[x + 0.14 * k + epsilon, y - 0.1 * k + epsilon],[x + 0.24 * k - epsilon, y - 0.03 * k - epsilon]])
          .stream(pointStream);

      canaryIslandsPoint = canaryIslands
          .translate([x + 0.19 * k, y + 0.005 * k])
          .clipExtent([[x + 0.14 * k + epsilon, y - 0.03 * k + epsilon],[x + 0.24 * k - epsilon, y + 0.04 * k - epsilon]])
          .stream(pointStream);

      martiniquePoint = martinique
          .translate([x + 0.29 * k, y - 0.275 * k])
          .clipExtent([[x + 0.24 * k + epsilon, y - 0.31 * k + epsilon],[x + 0.34 * k - epsilon, y - 0.24 * k - epsilon]])
          .stream(pointStream);

      mayottePoint = mayotte        
          .translate([x + 0.29 * k, y - 0.205 * k])
          .clipExtent([[x + 0.24 * k + epsilon, y - 0.24 * k + epsilon],[x + 0.34 * k - epsilon, y - 0.17 * k - epsilon]])
          .stream(pointStream);

      reunionPoint = reunion
          .translate([x + 0.29 * k, y - 0.135 * k])
          .clipExtent([[x + 0.24 * k + epsilon, y - 0.17 * k + epsilon],[x + 0.34 * k - epsilon, y - 0.1 * k - epsilon]])
          .stream(pointStream);
     
      maltaPoint = malta
          .translate([x + 0.29 * k, y - 0.065 * k])
          .clipExtent([[x + 0.24 * k + epsilon, y - 0.1 * k + epsilon],[x + 0.34 * k - epsilon, y - 0.03 * k - epsilon]])
          .stream(pointStream);
      


      return conicConformalEurope;
    };

    conicConformalEurope.drawCompositionBorders = function(context) {

      /*
      console.log("var ul, ur, ld, ll;");
      var projs = [guyane, martinique, guadeloupe, canaryIslands, madeira, mayotte, reunion, malta, azores, azores2, azores3];
      for (var i in projs){
        var ul = europe.invert([projs[i].clipExtent()[0][0], projs[i].clipExtent()[0][1]]);
        var ur = europe.invert([projs[i].clipExtent()[1][0], projs[i].clipExtent()[0][1]]);
        var ld = europe.invert([projs[i].clipExtent()[1][0], projs[i].clipExtent()[1][1]]);
        var ll = europe.invert([projs[i].clipExtent()[0][0], projs[i].clipExtent()[1][1]]);

        console.log("ul = europe(["+ul+"]);");
        console.log("ur = europe(["+ur+"]);");
        console.log("ld = europe(["+ld+"]);");
        console.log("ll = europe(["+ll+"]);");

        console.log("context.moveTo(ul[0], ul[1]);");
        console.log("context.lineTo(ur[0], ur[1]);");
        console.log("context.lineTo(ld[0], ld[1]);");
        console.log("context.lineTo(ll[0], ll[1]);");
        console.log("context.closePath();");

      }*/

      var ul, ur, ld, ll;
      ul = europe([42.45755610828648,63.343658547914934]);
      ur = europe([52.65837266667029,59.35045080290929]);
      ld = europe([47.19754502247785,56.12653496548117]);
      ll = europe([37.673034273363044,59.61638268506111]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([59.41110754003403,62.35069727399336]);
      ur = europe([66.75050228640794,57.11797303636038]);
      ld = europe([60.236065725110436,54.63331433818992]);
      ll = europe([52.65837313153311,59.350450804599355]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([48.81091130080243,66.93353402634641]);
      ur = europe([59.41110730654679,62.35069740653086]);
      ld = europe([52.6583728974441,59.3504509222445]);
      ll = europe([42.45755631675751,63.34365868805821]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([31.054198418446475,52.1080673766184]);
      ur = europe([39.09869284884117,49.400700047190554]);
      ld = europe([36.0580811499175,46.02944174908498]);
      ll = europe([28.690508588835726,48.433126979386415]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([33.977877745912025,55.849945501331]);
      ur = europe([42.75328432167726,52.78455122462353]);
      ld = europe([39.09869297540224,49.400700176148625]);
      ll = europe([31.05419851807008,52.10806751810923]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([52.658372900759296,59.35045068526415]);
      ur = europe([60.23606549583304,54.63331423800264]);
      ld = europe([54.6756370953122,51.892298789399455]);
      ll = europe([47.19754524788189,56.126534861222794]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([47.19754506082455,56.126534735591456]);
      ur = europe([54.675636900123514,51.892298681337095]);
      ld = europe([49.94448648951486,48.98775484983285]);
      ll = europe([42.75328468716108,52.78455126060818]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([42.75328453416769,52.78455113209101]);
      ur = europe([49.94448632339758,48.98775473706457]);
      ld = europe([45.912339990394315,45.99361784987003]);
      ll = europe([39.09869317356607,49.40070009378711]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([37.673034114296634,59.61638254183119]);
      ur = europe([47.197544835420544,56.126534839849846]);
      ld = europe([42.75328447467064,52.78455135314068]);
      ll = europe([33.977877870363905,55.849945644671145]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([44.56748486446032,57.26489367845818]);
      ld = europe([43.9335791193588,53.746540942601726]);
      ll = europe([43,56]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();
      ul = europe([37.673034114296634,59.61638254183119]);
      ur = europe([40.25902691953466,58.83002044222639]);
      ld = europe([38.458270492742024,57.26232178028002]);
      ll = europe([35.97754948030156,58.00266637992386]);
      context.moveTo(ul[0], ul[1]);
      context.lineTo(ur[0], ur[1]);
      context.lineTo(ld[0], ld[1]);
      context.lineTo(ll[0], ll[1]);
      context.closePath();

      

    };
    conicConformalEurope.getCompositionBorders = function() {
      var context = d3Path.path();
      this.drawCompositionBorders(context);
      return context.toString();
    };

    return conicConformalEurope.scale(750);
  }

  exports.geoAlbersUsa = albersUsa;
  exports.geoAlbersUsaTerritories = albersUsaTerritories;
  exports.geoConicConformalSpain = conicConformalSpain;
  exports.geoConicConformalPortugal = conicConformalPortugal;
  exports.geoMercatorEcuador = mercatorEcuador;
  exports.geoTransverseMercatorChile = transverseMercatorChile;
  exports.geoConicEquidistantJapan = conicEquidistantJapan;
  exports.geoConicConformalFrance = conicConformalFrance;
  exports.geoConicConformalEurope = conicConformalEurope;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
},{"d3-geo":6,"d3-path":12}],6:[function(require,module,exports){
// https://d3js.org/d3-geo/ Version 1.2.4. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-array')) :
  typeof define === 'function' && define.amd ? define(['exports', 'd3-array'], factory) :
  (factory((global.d3 = global.d3 || {}),global.d3));
}(this, (function (exports,d3Array) { 'use strict';

// Adds floating point numbers with twice the normal precision.
// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
// 305–363 (1997).
// Code adapted from GeographicLib by Charles F. F. Karney,
// http://geographiclib.sourceforge.net/

function adder() {
  return new Adder;
}

function Adder() {
  this.reset();
}

Adder.prototype = {
  constructor: Adder,
  reset: function() {
    this.s = // rounded value
    this.t = 0; // exact error
  },
  add: function(y) {
    add(temp, y, this.t);
    add(this, temp.s, this.s);
    if (this.s) this.t += temp.t;
    else this.s = temp.t;
  },
  valueOf: function() {
    return this.s;
  }
};

var temp = new Adder;

function add(adder, a, b) {
  var x = adder.s = a + b,
      bv = x - a,
      av = x - bv;
  adder.t = (a - av) + (b - bv);
}

var epsilon = 1e-6;
var epsilon2 = 1e-12;
var pi = Math.PI;
var halfPi = pi / 2;
var quarterPi = pi / 4;
var tau = pi * 2;

var degrees = 180 / pi;
var radians = pi / 180;

var abs = Math.abs;
var atan = Math.atan;
var atan2 = Math.atan2;
var cos = Math.cos;
var ceil = Math.ceil;
var exp = Math.exp;
var log = Math.log;
var pow = Math.pow;
var sin = Math.sin;
var sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
var sqrt = Math.sqrt;
var tan = Math.tan;

function acos(x) {
  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
}

function asin(x) {
  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
}

function haversin(x) {
  return (x = sin(x / 2)) * x;
}

function noop() {}

function streamGeometry(geometry, stream) {
  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
    streamGeometryType[geometry.type](geometry, stream);
  }
}

var streamObjectType = {
  Feature: function(feature, stream) {
    streamGeometry(feature.geometry, stream);
  },
  FeatureCollection: function(object, stream) {
    var features = object.features, i = -1, n = features.length;
    while (++i < n) streamGeometry(features[i].geometry, stream);
  }
};

var streamGeometryType = {
  Sphere: function(object, stream) {
    stream.sphere();
  },
  Point: function(object, stream) {
    object = object.coordinates;
    stream.point(object[0], object[1], object[2]);
  },
  MultiPoint: function(object, stream) {
    var coordinates = object.coordinates, i = -1, n = coordinates.length;
    while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);
  },
  LineString: function(object, stream) {
    streamLine(object.coordinates, stream, 0);
  },
  MultiLineString: function(object, stream) {
    var coordinates = object.coordinates, i = -1, n = coordinates.length;
    while (++i < n) streamLine(coordinates[i], stream, 0);
  },
  Polygon: function(object, stream) {
    streamPolygon(object.coordinates, stream);
  },
  MultiPolygon: function(object, stream) {
    var coordinates = object.coordinates, i = -1, n = coordinates.length;
    while (++i < n) streamPolygon(coordinates[i], stream);
  },
  GeometryCollection: function(object, stream) {
    var geometries = object.geometries, i = -1, n = geometries.length;
    while (++i < n) streamGeometry(geometries[i], stream);
  }
};

function streamLine(coordinates, stream, closed) {
  var i = -1, n = coordinates.length - closed, coordinate;
  stream.lineStart();
  while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
  stream.lineEnd();
}

function streamPolygon(coordinates, stream) {
  var i = -1, n = coordinates.length;
  stream.polygonStart();
  while (++i < n) streamLine(coordinates[i], stream, 1);
  stream.polygonEnd();
}

function geoStream(object, stream) {
  if (object && streamObjectType.hasOwnProperty(object.type)) {
    streamObjectType[object.type](object, stream);
  } else {
    streamGeometry(object, stream);
  }
}

var areaRingSum = adder();

var areaSum = adder();
var lambda00;
var phi00;
var lambda0;
var cosPhi0;
var sinPhi0;
var areaStream = {
  point: noop,
  lineStart: noop,
  lineEnd: noop,
  polygonStart: function() {
    areaRingSum.reset();
    areaStream.lineStart = areaRingStart;
    areaStream.lineEnd = areaRingEnd;
  },
  polygonEnd: function() {
    var areaRing = +areaRingSum;
    areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
    this.lineStart = this.lineEnd = this.point = noop;
  },
  sphere: function() {
    areaSum.add(tau);
  }
};

function areaRingStart() {
  areaStream.point = areaPointFirst;
}

function areaRingEnd() {
  areaPoint(lambda00, phi00);
}

function areaPointFirst(lambda, phi) {
  areaStream.point = areaPoint;
  lambda00 = lambda, phi00 = phi;
  lambda *= radians, phi *= radians;
  lambda0 = lambda, cosPhi0 = cos(phi = phi / 2 + quarterPi), sinPhi0 = sin(phi);
}

function areaPoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  phi = phi / 2 + quarterPi; // half the angular distance from south pole

  // Spherical excess E for a spherical triangle with vertices: south pole,
  // previous point, current point.  Uses a formula derived from Cagnoli’s
  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
  var dLambda = lambda - lambda0,
      sdLambda = dLambda >= 0 ? 1 : -1,
      adLambda = sdLambda * dLambda,
      cosPhi = cos(phi),
      sinPhi = sin(phi),
      k = sinPhi0 * sinPhi,
      u = cosPhi0 * cosPhi + k * cos(adLambda),
      v = k * sdLambda * sin(adLambda);
  areaRingSum.add(atan2(v, u));

  // Advance the previous points.
  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
}

function area(object) {
  areaSum.reset();
  geoStream(object, areaStream);
  return areaSum * 2;
}

function spherical(cartesian) {
  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
}

function cartesian(spherical) {
  var lambda = spherical[0], phi = spherical[1], cosPhi = cos(phi);
  return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
}

function cartesianDot(a, b) {
  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}

function cartesianCross(a, b) {
  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
}

// TODO return a
function cartesianAddInPlace(a, b) {
  a[0] += b[0], a[1] += b[1], a[2] += b[2];
}

function cartesianScale(vector, k) {
  return [vector[0] * k, vector[1] * k, vector[2] * k];
}

// TODO return d
function cartesianNormalizeInPlace(d) {
  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
  d[0] /= l, d[1] /= l, d[2] /= l;
}

var lambda0$1;
var phi0;
var lambda1;
var phi1;
var lambda2;
var lambda00$1;
var phi00$1;
var p0;
var deltaSum = adder();
var ranges;
var range$1;
var boundsStream = {
  point: boundsPoint,
  lineStart: boundsLineStart,
  lineEnd: boundsLineEnd,
  polygonStart: function() {
    boundsStream.point = boundsRingPoint;
    boundsStream.lineStart = boundsRingStart;
    boundsStream.lineEnd = boundsRingEnd;
    deltaSum.reset();
    areaStream.polygonStart();
  },
  polygonEnd: function() {
    areaStream.polygonEnd();
    boundsStream.point = boundsPoint;
    boundsStream.lineStart = boundsLineStart;
    boundsStream.lineEnd = boundsLineEnd;
    if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
    else if (deltaSum > epsilon) phi1 = 90;
    else if (deltaSum < -epsilon) phi0 = -90;
    range$1[0] = lambda0$1, range$1[1] = lambda1;
  }
};

function boundsPoint(lambda, phi) {
  ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
  if (phi < phi0) phi0 = phi;
  if (phi > phi1) phi1 = phi;
}

function linePoint(lambda, phi) {
  var p = cartesian([lambda * radians, phi * radians]);
  if (p0) {
    var normal = cartesianCross(p0, p),
        equatorial = [normal[1], -normal[0], 0],
        inflection = cartesianCross(equatorial, normal);
    cartesianNormalizeInPlace(inflection);
    inflection = spherical(inflection);
    var delta = lambda - lambda2,
        sign = delta > 0 ? 1 : -1,
        lambdai = inflection[0] * degrees * sign,
        phii,
        antimeridian = abs(delta) > 180;
    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
      phii = inflection[1] * degrees;
      if (phii > phi1) phi1 = phii;
    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
      phii = -inflection[1] * degrees;
      if (phii < phi0) phi0 = phii;
    } else {
      if (phi < phi0) phi0 = phi;
      if (phi > phi1) phi1 = phi;
    }
    if (antimeridian) {
      if (lambda < lambda2) {
        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
      } else {
        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
      }
    } else {
      if (lambda1 >= lambda0$1) {
        if (lambda < lambda0$1) lambda0$1 = lambda;
        if (lambda > lambda1) lambda1 = lambda;
      } else {
        if (lambda > lambda2) {
          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
        } else {
          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
        }
      }
    }
  } else {
    boundsPoint(lambda, phi);
  }
  p0 = p, lambda2 = lambda;
}

function boundsLineStart() {
  boundsStream.point = linePoint;
}

function boundsLineEnd() {
  range$1[0] = lambda0$1, range$1[1] = lambda1;
  boundsStream.point = boundsPoint;
  p0 = null;
}

function boundsRingPoint(lambda, phi) {
  if (p0) {
    var delta = lambda - lambda2;
    deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
  } else {
    lambda00$1 = lambda, phi00$1 = phi;
  }
  areaStream.point(lambda, phi);
  linePoint(lambda, phi);
}

function boundsRingStart() {
  areaStream.lineStart();
}

function boundsRingEnd() {
  boundsRingPoint(lambda00$1, phi00$1);
  areaStream.lineEnd();
  if (abs(deltaSum) > epsilon) lambda0$1 = -(lambda1 = 180);
  range$1[0] = lambda0$1, range$1[1] = lambda1;
  p0 = null;
}

// Finds the left-right distance between two longitudes.
// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
// the distance between ±180° to be 360°.
function angle(lambda0, lambda1) {
  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
}

function rangeCompare(a, b) {
  return a[0] - b[0];
}

function rangeContains(range, x) {
  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
}

function bounds(feature) {
  var i, n, a, b, merged, deltaMax, delta;

  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
  ranges = [];
  geoStream(feature, boundsStream);

  // First, sort ranges by their minimum longitudes.
  if (n = ranges.length) {
    ranges.sort(rangeCompare);

    // Then, merge any ranges that overlap.
    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
      b = ranges[i];
      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
      } else {
        merged.push(a = b);
      }
    }

    // Finally, find the largest gap between the merged ranges.
    // The final bounding box will be the inverse of this gap.
    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
      b = merged[i];
      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
    }
  }

  ranges = range$1 = null;

  return lambda0$1 === Infinity || phi0 === Infinity
      ? [[NaN, NaN], [NaN, NaN]]
      : [[lambda0$1, phi0], [lambda1, phi1]];
}

var W0;
var W1;
var X0;
var Y0;
var Z0;
var X1;
var Y1;
var Z1;
var X2;
var Y2;
var Z2;
var lambda00$2;
var phi00$2;
var x0;
var y0;
var z0;
// previous point

var centroidStream = {
  sphere: noop,
  point: centroidPoint,
  lineStart: centroidLineStart,
  lineEnd: centroidLineEnd,
  polygonStart: function() {
    centroidStream.lineStart = centroidRingStart;
    centroidStream.lineEnd = centroidRingEnd;
  },
  polygonEnd: function() {
    centroidStream.lineStart = centroidLineStart;
    centroidStream.lineEnd = centroidLineEnd;
  }
};

// Arithmetic mean of Cartesian vectors.
function centroidPoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  var cosPhi = cos(phi);
  centroidPointCartesian(cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi));
}

function centroidPointCartesian(x, y, z) {
  ++W0;
  X0 += (x - X0) / W0;
  Y0 += (y - Y0) / W0;
  Z0 += (z - Z0) / W0;
}

function centroidLineStart() {
  centroidStream.point = centroidLinePointFirst;
}

function centroidLinePointFirst(lambda, phi) {
  lambda *= radians, phi *= radians;
  var cosPhi = cos(phi);
  x0 = cosPhi * cos(lambda);
  y0 = cosPhi * sin(lambda);
  z0 = sin(phi);
  centroidStream.point = centroidLinePoint;
  centroidPointCartesian(x0, y0, z0);
}

function centroidLinePoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  var cosPhi = cos(phi),
      x = cosPhi * cos(lambda),
      y = cosPhi * sin(lambda),
      z = sin(phi),
      w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
  W1 += w;
  X1 += w * (x0 + (x0 = x));
  Y1 += w * (y0 + (y0 = y));
  Z1 += w * (z0 + (z0 = z));
  centroidPointCartesian(x0, y0, z0);
}

function centroidLineEnd() {
  centroidStream.point = centroidPoint;
}

// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
// J. Applied Mechanics 42, 239 (1975).
function centroidRingStart() {
  centroidStream.point = centroidRingPointFirst;
}

function centroidRingEnd() {
  centroidRingPoint(lambda00$2, phi00$2);
  centroidStream.point = centroidPoint;
}

function centroidRingPointFirst(lambda, phi) {
  lambda00$2 = lambda, phi00$2 = phi;
  lambda *= radians, phi *= radians;
  centroidStream.point = centroidRingPoint;
  var cosPhi = cos(phi);
  x0 = cosPhi * cos(lambda);
  y0 = cosPhi * sin(lambda);
  z0 = sin(phi);
  centroidPointCartesian(x0, y0, z0);
}

function centroidRingPoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  var cosPhi = cos(phi),
      x = cosPhi * cos(lambda),
      y = cosPhi * sin(lambda),
      z = sin(phi),
      cx = y0 * z - z0 * y,
      cy = z0 * x - x0 * z,
      cz = x0 * y - y0 * x,
      m = sqrt(cx * cx + cy * cy + cz * cz),
      u = x0 * x + y0 * y + z0 * z,
      v = m && -acos(u) / m, // area weight
      w = atan2(m, u); // line weight
  X2 += v * cx;
  Y2 += v * cy;
  Z2 += v * cz;
  W1 += w;
  X1 += w * (x0 + (x0 = x));
  Y1 += w * (y0 + (y0 = y));
  Z1 += w * (z0 + (z0 = z));
  centroidPointCartesian(x0, y0, z0);
}

function centroid(object) {
  W0 = W1 =
  X0 = Y0 = Z0 =
  X1 = Y1 = Z1 =
  X2 = Y2 = Z2 = 0;
  geoStream(object, centroidStream);

  var x = X2,
      y = Y2,
      z = Z2,
      m = x * x + y * y + z * z;

  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
  if (m < epsilon2) {
    x = X1, y = Y1, z = Z1;
    // If the feature has zero length, fall back to arithmetic mean of point vectors.
    if (W1 < epsilon) x = X0, y = Y0, z = Z0;
    m = x * x + y * y + z * z;
    // If the feature still has an undefined ccentroid, then return.
    if (m < epsilon2) return [NaN, NaN];
  }

  return [atan2(y, x) * degrees, asin(z / sqrt(m)) * degrees];
}

function constant(x) {
  return function() {
    return x;
  };
}

function compose(a, b) {

  function compose(x, y) {
    return x = a(x, y), b(x[0], x[1]);
  }

  if (a.invert && b.invert) compose.invert = function(x, y) {
    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
  };

  return compose;
}

function rotationIdentity(lambda, phi) {
  return [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
}

rotationIdentity.invert = rotationIdentity;

function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
  return (deltaLambda %= tau) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
    : rotationLambda(deltaLambda))
    : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
    : rotationIdentity);
}

function forwardRotationLambda(deltaLambda) {
  return function(lambda, phi) {
    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
  };
}

function rotationLambda(deltaLambda) {
  var rotation = forwardRotationLambda(deltaLambda);
  rotation.invert = forwardRotationLambda(-deltaLambda);
  return rotation;
}

function rotationPhiGamma(deltaPhi, deltaGamma) {
  var cosDeltaPhi = cos(deltaPhi),
      sinDeltaPhi = sin(deltaPhi),
      cosDeltaGamma = cos(deltaGamma),
      sinDeltaGamma = sin(deltaGamma);

  function rotation(lambda, phi) {
    var cosPhi = cos(phi),
        x = cos(lambda) * cosPhi,
        y = sin(lambda) * cosPhi,
        z = sin(phi),
        k = z * cosDeltaPhi + x * sinDeltaPhi;
    return [
      atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
      asin(k * cosDeltaGamma + y * sinDeltaGamma)
    ];
  }

  rotation.invert = function(lambda, phi) {
    var cosPhi = cos(phi),
        x = cos(lambda) * cosPhi,
        y = sin(lambda) * cosPhi,
        z = sin(phi),
        k = z * cosDeltaGamma - y * sinDeltaGamma;
    return [
      atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
      asin(k * cosDeltaPhi - x * sinDeltaPhi)
    ];
  };

  return rotation;
}

function rotation(rotate) {
  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);

  function forward(coordinates) {
    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
  }

  forward.invert = function(coordinates) {
    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
  };

  return forward;
}

// Generates a circle centered at [0°, 0°], with a given radius and precision.
function circleStream(stream, radius, delta, direction, t0, t1) {
  if (!delta) return;
  var cosRadius = cos(radius),
      sinRadius = sin(radius),
      step = direction * delta;
  if (t0 == null) {
    t0 = radius + direction * tau;
    t1 = radius - step / 2;
  } else {
    t0 = circleRadius(cosRadius, t0);
    t1 = circleRadius(cosRadius, t1);
    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau;
  }
  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
    point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
    stream.point(point[0], point[1]);
  }
}

// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
function circleRadius(cosRadius, point) {
  point = cartesian(point), point[0] -= cosRadius;
  cartesianNormalizeInPlace(point);
  var radius = acos(-point[1]);
  return ((-point[2] < 0 ? -radius : radius) + tau - epsilon) % tau;
}

function circle() {
  var center = constant([0, 0]),
      radius = constant(90),
      precision = constant(6),
      ring,
      rotate,
      stream = {point: point};

  function point(x, y) {
    ring.push(x = rotate(x, y));
    x[0] *= degrees, x[1] *= degrees;
  }

  function circle() {
    var c = center.apply(this, arguments),
        r = radius.apply(this, arguments) * radians,
        p = precision.apply(this, arguments) * radians;
    ring = [];
    rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;
    circleStream(stream, r, p, 1);
    c = {type: "Polygon", coordinates: [ring]};
    ring = rotate = null;
    return c;
  }

  circle.center = function(_) {
    return arguments.length ? (center = typeof _ === "function" ? _ : constant([+_[0], +_[1]]), circle) : center;
  };

  circle.radius = function(_) {
    return arguments.length ? (radius = typeof _ === "function" ? _ : constant(+_), circle) : radius;
  };

  circle.precision = function(_) {
    return arguments.length ? (precision = typeof _ === "function" ? _ : constant(+_), circle) : precision;
  };

  return circle;
}

function clipBuffer() {
  var lines = [],
      line;
  return {
    point: function(x, y) {
      line.push([x, y]);
    },
    lineStart: function() {
      lines.push(line = []);
    },
    lineEnd: noop,
    rejoin: function() {
      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
    },
    result: function() {
      var result = lines;
      lines = [];
      line = null;
      return result;
    }
  };
}

function clipLine(a, b, x0, y0, x1, y1) {
  var ax = a[0],
      ay = a[1],
      bx = b[0],
      by = b[1],
      t0 = 0,
      t1 = 1,
      dx = bx - ax,
      dy = by - ay,
      r;

  r = x0 - ax;
  if (!dx && r > 0) return;
  r /= dx;
  if (dx < 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  } else if (dx > 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  }

  r = x1 - ax;
  if (!dx && r < 0) return;
  r /= dx;
  if (dx < 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  } else if (dx > 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  }

  r = y0 - ay;
  if (!dy && r > 0) return;
  r /= dy;
  if (dy < 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  } else if (dy > 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  }

  r = y1 - ay;
  if (!dy && r < 0) return;
  r /= dy;
  if (dy < 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  } else if (dy > 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  }

  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
  return true;
}

function pointEqual(a, b) {
  return abs(a[0] - b[0]) < epsilon && abs(a[1] - b[1]) < epsilon;
}

function Intersection(point, points, other, entry) {
  this.x = point;
  this.z = points;
  this.o = other; // another intersection
  this.e = entry; // is an entry?
  this.v = false; // visited
  this.n = this.p = null; // next & previous
}

// A generalized polygon clipping algorithm: given a polygon that has been cut
// into its visible line segments, and rejoins the segments by interpolating
// along the clip edge.
function clipPolygon(segments, compareIntersection, startInside, interpolate, stream) {
  var subject = [],
      clip = [],
      i,
      n;

  segments.forEach(function(segment) {
    if ((n = segment.length - 1) <= 0) return;
    var n, p0 = segment[0], p1 = segment[n], x;

    // If the first and last points of a segment are coincident, then treat as a
    // closed ring. TODO if all rings are closed, then the winding order of the
    // exterior ring should be checked.
    if (pointEqual(p0, p1)) {
      stream.lineStart();
      for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);
      stream.lineEnd();
      return;
    }

    subject.push(x = new Intersection(p0, segment, null, true));
    clip.push(x.o = new Intersection(p0, null, x, false));
    subject.push(x = new Intersection(p1, segment, null, false));
    clip.push(x.o = new Intersection(p1, null, x, true));
  });

  if (!subject.length) return;

  clip.sort(compareIntersection);
  link(subject);
  link(clip);

  for (i = 0, n = clip.length; i < n; ++i) {
    clip[i].e = startInside = !startInside;
  }

  var start = subject[0],
      points,
      point;

  while (1) {
    // Find first unvisited intersection.
    var current = start,
        isSubject = true;
    while (current.v) if ((current = current.n) === start) return;
    points = current.z;
    stream.lineStart();
    do {
      current.v = current.o.v = true;
      if (current.e) {
        if (isSubject) {
          for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);
        } else {
          interpolate(current.x, current.n.x, 1, stream);
        }
        current = current.n;
      } else {
        if (isSubject) {
          points = current.p.z;
          for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);
        } else {
          interpolate(current.x, current.p.x, -1, stream);
        }
        current = current.p;
      }
      current = current.o;
      points = current.z;
      isSubject = !isSubject;
    } while (!current.v);
    stream.lineEnd();
  }
}

function link(array) {
  if (!(n = array.length)) return;
  var n,
      i = 0,
      a = array[0],
      b;
  while (++i < n) {
    a.n = b = array[i];
    b.p = a;
    a = b;
  }
  a.n = b = array[0];
  b.p = a;
}

var clipMax = 1e9;
var clipMin = -clipMax;
// TODO Use d3-polygon’s polygonContains here for the ring check?
// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?

function clipExtent(x0, y0, x1, y1) {

  function visible(x, y) {
    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
  }

  function interpolate(from, to, direction, stream) {
    var a = 0, a1 = 0;
    if (from == null
        || (a = corner(from, direction)) !== (a1 = corner(to, direction))
        || comparePoint(from, to) < 0 ^ direction > 0) {
      do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
      while ((a = (a + direction + 4) % 4) !== a1);
    } else {
      stream.point(to[0], to[1]);
    }
  }

  function corner(p, direction) {
    return abs(p[0] - x0) < epsilon ? direction > 0 ? 0 : 3
        : abs(p[0] - x1) < epsilon ? direction > 0 ? 2 : 1
        : abs(p[1] - y0) < epsilon ? direction > 0 ? 1 : 0
        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
  }

  function compareIntersection(a, b) {
    return comparePoint(a.x, b.x);
  }

  function comparePoint(a, b) {
    var ca = corner(a, 1),
        cb = corner(b, 1);
    return ca !== cb ? ca - cb
        : ca === 0 ? b[1] - a[1]
        : ca === 1 ? a[0] - b[0]
        : ca === 2 ? a[1] - b[1]
        : b[0] - a[0];
  }

  return function(stream) {
    var activeStream = stream,
        bufferStream = clipBuffer(),
        segments,
        polygon,
        ring,
        x__, y__, v__, // first point
        x_, y_, v_, // previous point
        first,
        clean;

    var clipStream = {
      point: point,
      lineStart: lineStart,
      lineEnd: lineEnd,
      polygonStart: polygonStart,
      polygonEnd: polygonEnd
    };

    function point(x, y) {
      if (visible(x, y)) activeStream.point(x, y);
    }

    function polygonInside() {
      var winding = 0;

      for (var i = 0, n = polygon.length; i < n; ++i) {
        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }
          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }
        }
      }

      return winding;
    }

    // Buffer geometry within a polygon and then clip it en masse.
    function polygonStart() {
      activeStream = bufferStream, segments = [], polygon = [], clean = true;
    }

    function polygonEnd() {
      var startInside = polygonInside(),
          cleanInside = clean && startInside,
          visible = (segments = d3Array.merge(segments)).length;
      if (cleanInside || visible) {
        stream.polygonStart();
        if (cleanInside) {
          stream.lineStart();
          interpolate(null, null, 1, stream);
          stream.lineEnd();
        }
        if (visible) {
          clipPolygon(segments, compareIntersection, startInside, interpolate, stream);
        }
        stream.polygonEnd();
      }
      activeStream = stream, segments = polygon = ring = null;
    }

    function lineStart() {
      clipStream.point = linePoint;
      if (polygon) polygon.push(ring = []);
      first = true;
      v_ = false;
      x_ = y_ = NaN;
    }

    // TODO rather than special-case polygons, simply handle them separately.
    // Ideally, coincident intersection points should be jittered to avoid
    // clipping issues.
    function lineEnd() {
      if (segments) {
        linePoint(x__, y__);
        if (v__ && v_) bufferStream.rejoin();
        segments.push(bufferStream.result());
      }
      clipStream.point = point;
      if (v_) activeStream.lineEnd();
    }

    function linePoint(x, y) {
      var v = visible(x, y);
      if (polygon) ring.push([x, y]);
      if (first) {
        x__ = x, y__ = y, v__ = v;
        first = false;
        if (v) {
          activeStream.lineStart();
          activeStream.point(x, y);
        }
      } else {
        if (v && v_) activeStream.point(x, y);
        else {
          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
          if (clipLine(a, b, x0, y0, x1, y1)) {
            if (!v_) {
              activeStream.lineStart();
              activeStream.point(a[0], a[1]);
            }
            activeStream.point(b[0], b[1]);
            if (!v) activeStream.lineEnd();
            clean = false;
          } else if (v) {
            activeStream.lineStart();
            activeStream.point(x, y);
            clean = false;
          }
        }
      }
      x_ = x, y_ = y, v_ = v;
    }

    return clipStream;
  };
}

function extent() {
  var x0 = 0,
      y0 = 0,
      x1 = 960,
      y1 = 500,
      cache,
      cacheStream,
      clip;

  return clip = {
    stream: function(stream) {
      return cache && cacheStream === stream ? cache : cache = clipExtent(x0, y0, x1, y1)(cacheStream = stream);
    },
    extent: function(_) {
      return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];
    }
  };
}

var lengthSum = adder();
var lambda0$2;
var sinPhi0$1;
var cosPhi0$1;
var lengthStream = {
  sphere: noop,
  point: noop,
  lineStart: lengthLineStart,
  lineEnd: noop,
  polygonStart: noop,
  polygonEnd: noop
};

function lengthLineStart() {
  lengthStream.point = lengthPointFirst;
  lengthStream.lineEnd = lengthLineEnd;
}

function lengthLineEnd() {
  lengthStream.point = lengthStream.lineEnd = noop;
}

function lengthPointFirst(lambda, phi) {
  lambda *= radians, phi *= radians;
  lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
  lengthStream.point = lengthPoint;
}

function lengthPoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  var sinPhi = sin(phi),
      cosPhi = cos(phi),
      delta = abs(lambda - lambda0$2),
      cosDelta = cos(delta),
      sinDelta = sin(delta),
      x = cosPhi * sinDelta,
      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
  lengthSum.add(atan2(sqrt(x * x + y * y), z));
  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
}

function length(object) {
  lengthSum.reset();
  geoStream(object, lengthStream);
  return +lengthSum;
}

var coordinates = [null, null];
var object = {type: "LineString", coordinates: coordinates};
function distance(a, b) {
  coordinates[0] = a;
  coordinates[1] = b;
  return length(object);
}

function graticuleX(y0, y1, dy) {
  var y = d3Array.range(y0, y1 - epsilon, dy).concat(y1);
  return function(x) { return y.map(function(y) { return [x, y]; }); };
}

function graticuleY(x0, x1, dx) {
  var x = d3Array.range(x0, x1 - epsilon, dx).concat(x1);
  return function(y) { return x.map(function(x) { return [x, y]; }); };
}

function graticule() {
  var x1, x0, X1, X0,
      y1, y0, Y1, Y0,
      dx = 10, dy = dx, DX = 90, DY = 360,
      x, y, X, Y,
      precision = 2.5;

  function graticule() {
    return {type: "MultiLineString", coordinates: lines()};
  }

  function lines() {
    return d3Array.range(ceil(X0 / DX) * DX, X1, DX).map(X)
        .concat(d3Array.range(ceil(Y0 / DY) * DY, Y1, DY).map(Y))
        .concat(d3Array.range(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon; }).map(x))
        .concat(d3Array.range(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon; }).map(y));
  }

  graticule.lines = function() {
    return lines().map(function(coordinates) { return {type: "LineString", coordinates: coordinates}; });
  };

  graticule.outline = function() {
    return {
      type: "Polygon",
      coordinates: [
        X(X0).concat(
        Y(Y1).slice(1),
        X(X1).reverse().slice(1),
        Y(Y0).reverse().slice(1))
      ]
    };
  };

  graticule.extent = function(_) {
    if (!arguments.length) return graticule.extentMinor();
    return graticule.extentMajor(_).extentMinor(_);
  };

  graticule.extentMajor = function(_) {
    if (!arguments.length) return [[X0, Y0], [X1, Y1]];
    X0 = +_[0][0], X1 = +_[1][0];
    Y0 = +_[0][1], Y1 = +_[1][1];
    if (X0 > X1) _ = X0, X0 = X1, X1 = _;
    if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
    return graticule.precision(precision);
  };

  graticule.extentMinor = function(_) {
    if (!arguments.length) return [[x0, y0], [x1, y1]];
    x0 = +_[0][0], x1 = +_[1][0];
    y0 = +_[0][1], y1 = +_[1][1];
    if (x0 > x1) _ = x0, x0 = x1, x1 = _;
    if (y0 > y1) _ = y0, y0 = y1, y1 = _;
    return graticule.precision(precision);
  };

  graticule.step = function(_) {
    if (!arguments.length) return graticule.stepMinor();
    return graticule.stepMajor(_).stepMinor(_);
  };

  graticule.stepMajor = function(_) {
    if (!arguments.length) return [DX, DY];
    DX = +_[0], DY = +_[1];
    return graticule;
  };

  graticule.stepMinor = function(_) {
    if (!arguments.length) return [dx, dy];
    dx = +_[0], dy = +_[1];
    return graticule;
  };

  graticule.precision = function(_) {
    if (!arguments.length) return precision;
    precision = +_;
    x = graticuleX(y0, y1, 90);
    y = graticuleY(x0, x1, precision);
    X = graticuleX(Y0, Y1, 90);
    Y = graticuleY(X0, X1, precision);
    return graticule;
  };

  return graticule
      .extentMajor([[-180, -90 + epsilon], [180, 90 - epsilon]])
      .extentMinor([[-180, -80 - epsilon], [180, 80 + epsilon]]);
}

function interpolate(a, b) {
  var x0 = a[0] * radians,
      y0 = a[1] * radians,
      x1 = b[0] * radians,
      y1 = b[1] * radians,
      cy0 = cos(y0),
      sy0 = sin(y0),
      cy1 = cos(y1),
      sy1 = sin(y1),
      kx0 = cy0 * cos(x0),
      ky0 = cy0 * sin(x0),
      kx1 = cy1 * cos(x1),
      ky1 = cy1 * sin(x1),
      d = 2 * asin(sqrt(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),
      k = sin(d);

  var interpolate = d ? function(t) {
    var B = sin(t *= d) / k,
        A = sin(d - t) / k,
        x = A * kx0 + B * kx1,
        y = A * ky0 + B * ky1,
        z = A * sy0 + B * sy1;
    return [
      atan2(y, x) * degrees,
      atan2(z, sqrt(x * x + y * y)) * degrees
    ];
  } : function() {
    return [x0 * degrees, y0 * degrees];
  };

  interpolate.distance = d;

  return interpolate;
}

function identity(x) {
  return x;
}

var areaSum$1 = adder();
var areaRingSum$1 = adder();
var x00;
var y00;
var x0$1;
var y0$1;
var areaStream$1 = {
  point: noop,
  lineStart: noop,
  lineEnd: noop,
  polygonStart: function() {
    areaStream$1.lineStart = areaRingStart$1;
    areaStream$1.lineEnd = areaRingEnd$1;
  },
  polygonEnd: function() {
    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop;
    areaSum$1.add(abs(areaRingSum$1));
    areaRingSum$1.reset();
  },
  result: function() {
    var area = areaSum$1 / 2;
    areaSum$1.reset();
    return area;
  }
};

function areaRingStart$1() {
  areaStream$1.point = areaPointFirst$1;
}

function areaPointFirst$1(x, y) {
  areaStream$1.point = areaPoint$1;
  x00 = x0$1 = x, y00 = y0$1 = y;
}

function areaPoint$1(x, y) {
  areaRingSum$1.add(y0$1 * x - x0$1 * y);
  x0$1 = x, y0$1 = y;
}

function areaRingEnd$1() {
  areaPoint$1(x00, y00);
}

var x0$2 = Infinity;
var y0$2 = x0$2;
var x1 = -x0$2;
var y1 = x1;
var boundsStream$1 = {
  point: boundsPoint$1,
  lineStart: noop,
  lineEnd: noop,
  polygonStart: noop,
  polygonEnd: noop,
  result: function() {
    var bounds = [[x0$2, y0$2], [x1, y1]];
    x1 = y1 = -(y0$2 = x0$2 = Infinity);
    return bounds;
  }
};

function boundsPoint$1(x, y) {
  if (x < x0$2) x0$2 = x;
  if (x > x1) x1 = x;
  if (y < y0$2) y0$2 = y;
  if (y > y1) y1 = y;
}

var X0$1 = 0;
var Y0$1 = 0;
var Z0$1 = 0;
var X1$1 = 0;
var Y1$1 = 0;
var Z1$1 = 0;
var X2$1 = 0;
var Y2$1 = 0;
var Z2$1 = 0;
var x00$1;
var y00$1;
var x0$3;
var y0$3;
var centroidStream$1 = {
  point: centroidPoint$1,
  lineStart: centroidLineStart$1,
  lineEnd: centroidLineEnd$1,
  polygonStart: function() {
    centroidStream$1.lineStart = centroidRingStart$1;
    centroidStream$1.lineEnd = centroidRingEnd$1;
  },
  polygonEnd: function() {
    centroidStream$1.point = centroidPoint$1;
    centroidStream$1.lineStart = centroidLineStart$1;
    centroidStream$1.lineEnd = centroidLineEnd$1;
  },
  result: function() {
    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]
        : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]
        : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]
        : [NaN, NaN];
    X0$1 = Y0$1 = Z0$1 =
    X1$1 = Y1$1 = Z1$1 =
    X2$1 = Y2$1 = Z2$1 = 0;
    return centroid;
  }
};

function centroidPoint$1(x, y) {
  X0$1 += x;
  Y0$1 += y;
  ++Z0$1;
}

function centroidLineStart$1() {
  centroidStream$1.point = centroidPointFirstLine;
}

function centroidPointFirstLine(x, y) {
  centroidStream$1.point = centroidPointLine;
  centroidPoint$1(x0$3 = x, y0$3 = y);
}

function centroidPointLine(x, y) {
  var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);
  X1$1 += z * (x0$3 + x) / 2;
  Y1$1 += z * (y0$3 + y) / 2;
  Z1$1 += z;
  centroidPoint$1(x0$3 = x, y0$3 = y);
}

function centroidLineEnd$1() {
  centroidStream$1.point = centroidPoint$1;
}

function centroidRingStart$1() {
  centroidStream$1.point = centroidPointFirstRing;
}

function centroidRingEnd$1() {
  centroidPointRing(x00$1, y00$1);
}

function centroidPointFirstRing(x, y) {
  centroidStream$1.point = centroidPointRing;
  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
}

function centroidPointRing(x, y) {
  var dx = x - x0$3,
      dy = y - y0$3,
      z = sqrt(dx * dx + dy * dy);

  X1$1 += z * (x0$3 + x) / 2;
  Y1$1 += z * (y0$3 + y) / 2;
  Z1$1 += z;

  z = y0$3 * x - x0$3 * y;
  X2$1 += z * (x0$3 + x);
  Y2$1 += z * (y0$3 + y);
  Z2$1 += z * 3;
  centroidPoint$1(x0$3 = x, y0$3 = y);
}

function PathContext(context) {
  this._context = context;
}

PathContext.prototype = {
  _radius: 4.5,
  pointRadius: function(_) {
    return this._radius = _, this;
  },
  polygonStart: function() {
    this._line = 0;
  },
  polygonEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._point = 0;
  },
  lineEnd: function() {
    if (this._line === 0) this._context.closePath();
    this._point = NaN;
  },
  point: function(x, y) {
    switch (this._point) {
      case 0: {
        this._context.moveTo(x, y);
        this._point = 1;
        break;
      }
      case 1: {
        this._context.lineTo(x, y);
        break;
      }
      default: {
        this._context.moveTo(x + this._radius, y);
        this._context.arc(x, y, this._radius, 0, tau);
        break;
      }
    }
  },
  result: noop
};

function PathString() {
  this._string = [];
}

PathString.prototype = {
  _circle: circle$1(4.5),
  pointRadius: function(_) {
    return this._circle = circle$1(_), this;
  },
  polygonStart: function() {
    this._line = 0;
  },
  polygonEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._point = 0;
  },
  lineEnd: function() {
    if (this._line === 0) this._string.push("Z");
    this._point = NaN;
  },
  point: function(x, y) {
    switch (this._point) {
      case 0: {
        this._string.push("M", x, ",", y);
        this._point = 1;
        break;
      }
      case 1: {
        this._string.push("L", x, ",", y);
        break;
      }
      default: {
        this._string.push("M", x, ",", y, this._circle);
        break;
      }
    }
  },
  result: function() {
    if (this._string.length) {
      var result = this._string.join("");
      this._string = [];
      return result;
    }
  }
};

function circle$1(radius) {
  return "m0," + radius
      + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
      + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
      + "z";
}

function index() {
  var pointRadius = 4.5,
      projection,
      projectionStream,
      context,
      contextStream;

  function path(object) {
    if (object) {
      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
      geoStream(object, projectionStream(contextStream));
    }
    return contextStream.result();
  }

  path.area = function(object) {
    geoStream(object, projectionStream(areaStream$1));
    return areaStream$1.result();
  };

  path.bounds = function(object) {
    geoStream(object, projectionStream(boundsStream$1));
    return boundsStream$1.result();
  };

  path.centroid = function(object) {
    geoStream(object, projectionStream(centroidStream$1));
    return centroidStream$1.result();
  };

  path.projection = function(_) {
    return arguments.length ? (projectionStream = (projection = _) == null ? identity : _.stream, path) : projection;
  };

  path.context = function(_) {
    if (!arguments.length) return context;
    contextStream = (context = _) == null ? new PathString : new PathContext(_);
    if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
    return path;
  };

  path.pointRadius = function(_) {
    if (!arguments.length) return pointRadius;
    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
    return path;
  };

  return path.projection(null).context(null);
}

var sum = adder();

function polygonContains(polygon, point) {
  var lambda = point[0],
      phi = point[1],
      normal = [sin(lambda), -cos(lambda), 0],
      angle = 0,
      winding = 0;

  sum.reset();

  for (var i = 0, n = polygon.length; i < n; ++i) {
    if (!(m = (ring = polygon[i]).length)) continue;
    var ring,
        m,
        point0 = ring[m - 1],
        lambda0 = point0[0],
        phi0 = point0[1] / 2 + quarterPi,
        sinPhi0 = sin(phi0),
        cosPhi0 = cos(phi0);

    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
      var point1 = ring[j],
          lambda1 = point1[0],
          phi1 = point1[1] / 2 + quarterPi,
          sinPhi1 = sin(phi1),
          cosPhi1 = cos(phi1),
          delta = lambda1 - lambda0,
          sign = delta >= 0 ? 1 : -1,
          absDelta = sign * delta,
          antimeridian = absDelta > pi,
          k = sinPhi0 * sinPhi1;

      sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
      angle += antimeridian ? delta + sign * tau : delta;

      // Are the longitudes either side of the point’s meridian (lambda),
      // and are the latitudes smaller than the parallel (phi)?
      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
        var arc = cartesianCross(cartesian(point0), cartesian(point1));
        cartesianNormalizeInPlace(arc);
        var intersection = cartesianCross(normal, arc);
        cartesianNormalizeInPlace(intersection);
        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
          winding += antimeridian ^ delta >= 0 ? 1 : -1;
        }
      }
    }
  }

  // First, determine whether the South pole is inside or outside:
  //
  // It is inside if:
  // * the polygon winds around it in a clockwise direction.
  // * the polygon does not (cumulatively) wind around it, but has a negative
  //   (counter-clockwise) area.
  //
  // Second, count the (signed) number of times a segment crosses a lambda
  // from the point to the South pole.  If it is zero, then the point is the
  // same side as the South pole.

  return (angle < -epsilon || angle < epsilon && sum < -epsilon) ^ (winding & 1);
}

function clip(pointVisible, clipLine, interpolate, start) {
  return function(rotate, sink) {
    var line = clipLine(sink),
        rotatedStart = rotate.invert(start[0], start[1]),
        ringBuffer = clipBuffer(),
        ringSink = clipLine(ringBuffer),
        polygonStarted = false,
        polygon,
        segments,
        ring;

    var clip = {
      point: point,
      lineStart: lineStart,
      lineEnd: lineEnd,
      polygonStart: function() {
        clip.point = pointRing;
        clip.lineStart = ringStart;
        clip.lineEnd = ringEnd;
        segments = [];
        polygon = [];
      },
      polygonEnd: function() {
        clip.point = point;
        clip.lineStart = lineStart;
        clip.lineEnd = lineEnd;
        segments = d3Array.merge(segments);
        var startInside = polygonContains(polygon, rotatedStart);
        if (segments.length) {
          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
          clipPolygon(segments, compareIntersection, startInside, interpolate, sink);
        } else if (startInside) {
          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
          sink.lineStart();
          interpolate(null, null, 1, sink);
          sink.lineEnd();
        }
        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
        segments = polygon = null;
      },
      sphere: function() {
        sink.polygonStart();
        sink.lineStart();
        interpolate(null, null, 1, sink);
        sink.lineEnd();
        sink.polygonEnd();
      }
    };

    function point(lambda, phi) {
      var point = rotate(lambda, phi);
      if (pointVisible(lambda = point[0], phi = point[1])) sink.point(lambda, phi);
    }

    function pointLine(lambda, phi) {
      var point = rotate(lambda, phi);
      line.point(point[0], point[1]);
    }

    function lineStart() {
      clip.point = pointLine;
      line.lineStart();
    }

    function lineEnd() {
      clip.point = point;
      line.lineEnd();
    }

    function pointRing(lambda, phi) {
      ring.push([lambda, phi]);
      var point = rotate(lambda, phi);
      ringSink.point(point[0], point[1]);
    }

    function ringStart() {
      ringSink.lineStart();
      ring = [];
    }

    function ringEnd() {
      pointRing(ring[0][0], ring[0][1]);
      ringSink.lineEnd();

      var clean = ringSink.clean(),
          ringSegments = ringBuffer.result(),
          i, n = ringSegments.length, m,
          segment,
          point;

      ring.pop();
      polygon.push(ring);
      ring = null;

      if (!n) return;

      // No intersections.
      if (clean & 1) {
        segment = ringSegments[0];
        if ((m = segment.length - 1) > 0) {
          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
          sink.lineStart();
          for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);
          sink.lineEnd();
        }
        return;
      }

      // Rejoin connected segments.
      // TODO reuse ringBuffer.rejoin()?
      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));

      segments.push(ringSegments.filter(validSegment));
    }

    return clip;
  };
}

function validSegment(segment) {
  return segment.length > 1;
}

// Intersections are sorted along the clip edge. For both antimeridian cutting
// and circle clipping, the same comparison is used.
function compareIntersection(a, b) {
  return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon : halfPi - a[1])
       - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon : halfPi - b[1]);
}

var clipAntimeridian = clip(
  function() { return true; },
  clipAntimeridianLine,
  clipAntimeridianInterpolate,
  [-pi, -halfPi]
);

// Takes a line and cuts into visible segments. Return values: 0 - there were
// intersections or the line was empty; 1 - no intersections; 2 - there were
// intersections, and the first and last segments should be rejoined.
function clipAntimeridianLine(stream) {
  var lambda0 = NaN,
      phi0 = NaN,
      sign0 = NaN,
      clean; // no intersections

  return {
    lineStart: function() {
      stream.lineStart();
      clean = 1;
    },
    point: function(lambda1, phi1) {
      var sign1 = lambda1 > 0 ? pi : -pi,
          delta = abs(lambda1 - lambda0);
      if (abs(delta - pi) < epsilon) { // line crosses a pole
        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
        stream.point(sign0, phi0);
        stream.lineEnd();
        stream.lineStart();
        stream.point(sign1, phi0);
        stream.point(lambda1, phi0);
        clean = 0;
      } else if (sign0 !== sign1 && delta >= pi) { // line crosses antimeridian
        if (abs(lambda0 - sign0) < epsilon) lambda0 -= sign0 * epsilon; // handle degeneracies
        if (abs(lambda1 - sign1) < epsilon) lambda1 -= sign1 * epsilon;
        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
        stream.point(sign0, phi0);
        stream.lineEnd();
        stream.lineStart();
        stream.point(sign1, phi0);
        clean = 0;
      }
      stream.point(lambda0 = lambda1, phi0 = phi1);
      sign0 = sign1;
    },
    lineEnd: function() {
      stream.lineEnd();
      lambda0 = phi0 = NaN;
    },
    clean: function() {
      return 2 - clean; // if intersections, rejoin first and last segments
    }
  };
}

function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
  var cosPhi0,
      cosPhi1,
      sinLambda0Lambda1 = sin(lambda0 - lambda1);
  return abs(sinLambda0Lambda1) > epsilon
      ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1)
          - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0))
          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
      : (phi0 + phi1) / 2;
}

function clipAntimeridianInterpolate(from, to, direction, stream) {
  var phi;
  if (from == null) {
    phi = direction * halfPi;
    stream.point(-pi, phi);
    stream.point(0, phi);
    stream.point(pi, phi);
    stream.point(pi, 0);
    stream.point(pi, -phi);
    stream.point(0, -phi);
    stream.point(-pi, -phi);
    stream.point(-pi, 0);
    stream.point(-pi, phi);
  } else if (abs(from[0] - to[0]) > epsilon) {
    var lambda = from[0] < to[0] ? pi : -pi;
    phi = direction * lambda / 2;
    stream.point(-lambda, phi);
    stream.point(0, phi);
    stream.point(lambda, phi);
  } else {
    stream.point(to[0], to[1]);
  }
}

function clipCircle(radius, delta) {
  var cr = cos(radius),
      smallRadius = cr > 0,
      notHemisphere = abs(cr) > epsilon; // TODO optimise for this common case

  function interpolate(from, to, direction, stream) {
    circleStream(stream, radius, delta, direction, from, to);
  }

  function visible(lambda, phi) {
    return cos(lambda) * cos(phi) > cr;
  }

  // Takes a line and cuts into visible segments. Return values used for polygon
  // clipping: 0 - there were intersections or the line was empty; 1 - no
  // intersections 2 - there were intersections, and the first and last segments
  // should be rejoined.
  function clipLine(stream) {
    var point0, // previous point
        c0, // code for previous point
        v0, // visibility of previous point
        v00, // visibility of first point
        clean; // no intersections
    return {
      lineStart: function() {
        v00 = v0 = false;
        clean = 1;
      },
      point: function(lambda, phi) {
        var point1 = [lambda, phi],
            point2,
            v = visible(lambda, phi),
            c = smallRadius
              ? v ? 0 : code(lambda, phi)
              : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
        if (!point0 && (v00 = v0 = v)) stream.lineStart();
        // Handle degeneracies.
        // TODO ignore if not clipping polygons.
        if (v !== v0) {
          point2 = intersect(point0, point1);
          if (pointEqual(point0, point2) || pointEqual(point1, point2)) {
            point1[0] += epsilon;
            point1[1] += epsilon;
            v = visible(point1[0], point1[1]);
          }
        }
        if (v !== v0) {
          clean = 0;
          if (v) {
            // outside going in
            stream.lineStart();
            point2 = intersect(point1, point0);
            stream.point(point2[0], point2[1]);
          } else {
            // inside going out
            point2 = intersect(point0, point1);
            stream.point(point2[0], point2[1]);
            stream.lineEnd();
          }
          point0 = point2;
        } else if (notHemisphere && point0 && smallRadius ^ v) {
          var t;
          // If the codes for two points are different, or are both zero,
          // and there this segment intersects with the small circle.
          if (!(c & c0) && (t = intersect(point1, point0, true))) {
            clean = 0;
            if (smallRadius) {
              stream.lineStart();
              stream.point(t[0][0], t[0][1]);
              stream.point(t[1][0], t[1][1]);
              stream.lineEnd();
            } else {
              stream.point(t[1][0], t[1][1]);
              stream.lineEnd();
              stream.lineStart();
              stream.point(t[0][0], t[0][1]);
            }
          }
        }
        if (v && (!point0 || !pointEqual(point0, point1))) {
          stream.point(point1[0], point1[1]);
        }
        point0 = point1, v0 = v, c0 = c;
      },
      lineEnd: function() {
        if (v0) stream.lineEnd();
        point0 = null;
      },
      // Rejoin first and last segments if there were intersections and the first
      // and last points were visible.
      clean: function() {
        return clean | ((v00 && v0) << 1);
      }
    };
  }

  // Intersects the great circle between a and b with the clip circle.
  function intersect(a, b, two) {
    var pa = cartesian(a),
        pb = cartesian(b);

    // We have two planes, n1.p = d1 and n2.p = d2.
    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
    var n1 = [1, 0, 0], // normal
        n2 = cartesianCross(pa, pb),
        n2n2 = cartesianDot(n2, n2),
        n1n2 = n2[0], // cartesianDot(n1, n2),
        determinant = n2n2 - n1n2 * n1n2;

    // Two polar points.
    if (!determinant) return !two && a;

    var c1 =  cr * n2n2 / determinant,
        c2 = -cr * n1n2 / determinant,
        n1xn2 = cartesianCross(n1, n2),
        A = cartesianScale(n1, c1),
        B = cartesianScale(n2, c2);
    cartesianAddInPlace(A, B);

    // Solve |p(t)|^2 = 1.
    var u = n1xn2,
        w = cartesianDot(A, u),
        uu = cartesianDot(u, u),
        t2 = w * w - uu * (cartesianDot(A, A) - 1);

    if (t2 < 0) return;

    var t = sqrt(t2),
        q = cartesianScale(u, (-w - t) / uu);
    cartesianAddInPlace(q, A);
    q = spherical(q);

    if (!two) return q;

    // Two intersection points.
    var lambda0 = a[0],
        lambda1 = b[0],
        phi0 = a[1],
        phi1 = b[1],
        z;

    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;

    var delta = lambda1 - lambda0,
        polar = abs(delta - pi) < epsilon,
        meridian = polar || delta < epsilon;

    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;

    // Check that the first point is between a and b.
    if (meridian
        ? polar
          ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon ? phi0 : phi1)
          : phi0 <= q[1] && q[1] <= phi1
        : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
      var q1 = cartesianScale(u, (-w + t) / uu);
      cartesianAddInPlace(q1, A);
      return [q, spherical(q1)];
    }
  }

  // Generates a 4-bit vector representing the location of a point relative to
  // the small circle's bounding box.
  function code(lambda, phi) {
    var r = smallRadius ? radius : pi - radius,
        code = 0;
    if (lambda < -r) code |= 1; // left
    else if (lambda > r) code |= 2; // right
    if (phi < -r) code |= 4; // below
    else if (phi > r) code |= 8; // above
    return code;
  }

  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
}

function transform(prototype) {
  return {
    stream: transform$1(prototype)
  };
}

function transform$1(prototype) {
  function T() {}
  var p = T.prototype = Object.create(Transform.prototype);
  for (var k in prototype) p[k] = prototype[k];
  return function(stream) {
    var t = new T;
    t.stream = stream;
    return t;
  };
}

function Transform() {}

Transform.prototype = {
  point: function(x, y) { this.stream.point(x, y); },
  sphere: function() { this.stream.sphere(); },
  lineStart: function() { this.stream.lineStart(); },
  lineEnd: function() { this.stream.lineEnd(); },
  polygonStart: function() { this.stream.polygonStart(); },
  polygonEnd: function() { this.stream.polygonEnd(); }
};

function fit(project, extent, object) {
  var w = extent[1][0] - extent[0][0],
      h = extent[1][1] - extent[0][1],
      clip = project.clipExtent && project.clipExtent();

  project
      .scale(150)
      .translate([0, 0]);

  if (clip != null) project.clipExtent(null);

  geoStream(object, project.stream(boundsStream$1));

  var b = boundsStream$1.result(),
      k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
      x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
      y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;

  if (clip != null) project.clipExtent(clip);

  return project
      .scale(k * 150)
      .translate([x, y]);
}

function fitSize(project) {
  return function(size, object) {
    return fit(project, [[0, 0], size], object);
  };
}

function fitExtent(project) {
  return function(extent, object) {
    return fit(project, extent, object);
  };
}

var maxDepth = 16;
var cosMinDistance = cos(30 * radians);
// cos(minimum angular distance)

function resample(project, delta2) {
  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
}

function resampleNone(project) {
  return transform$1({
    point: function(x, y) {
      x = project(x, y);
      this.stream.point(x[0], x[1]);
    }
  });
}

function resample$1(project, delta2) {

  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
    var dx = x1 - x0,
        dy = y1 - y0,
        d2 = dx * dx + dy * dy;
    if (d2 > 4 * delta2 && depth--) {
      var a = a0 + a1,
          b = b0 + b1,
          c = c0 + c1,
          m = sqrt(a * a + b * b + c * c),
          phi2 = asin(c /= m),
          lambda2 = abs(abs(c) - 1) < epsilon || abs(lambda0 - lambda1) < epsilon ? (lambda0 + lambda1) / 2 : atan2(b, a),
          p = project(lambda2, phi2),
          x2 = p[0],
          y2 = p[1],
          dx2 = x2 - x0,
          dy2 = y2 - y0,
          dz = dy * dx2 - dx * dy2;
      if (dz * dz / d2 > delta2 // perpendicular projected distance
          || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
          || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
        stream.point(x2, y2);
        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
      }
    }
  }
  return function(stream) {
    var lambda00, x00, y00, a00, b00, c00, // first point
        lambda0, x0, y0, a0, b0, c0; // previous point

    var resampleStream = {
      point: point,
      lineStart: lineStart,
      lineEnd: lineEnd,
      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
    };

    function point(x, y) {
      x = project(x, y);
      stream.point(x[0], x[1]);
    }

    function lineStart() {
      x0 = NaN;
      resampleStream.point = linePoint;
      stream.lineStart();
    }

    function linePoint(lambda, phi) {
      var c = cartesian([lambda, phi]), p = project(lambda, phi);
      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
      stream.point(x0, y0);
    }

    function lineEnd() {
      resampleStream.point = point;
      stream.lineEnd();
    }

    function ringStart() {
      lineStart();
      resampleStream.point = ringPoint;
      resampleStream.lineEnd = ringEnd;
    }

    function ringPoint(lambda, phi) {
      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
      resampleStream.point = linePoint;
    }

    function ringEnd() {
      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
      resampleStream.lineEnd = lineEnd;
      lineEnd();
    }

    return resampleStream;
  };
}

var transformRadians = transform$1({
  point: function(x, y) {
    this.stream.point(x * radians, y * radians);
  }
});

function projection(project) {
  return projectionMutator(function() { return project; })();
}

function projectionMutator(projectAt) {
  var project,
      k = 150, // scale
      x = 480, y = 250, // translate
      dx, dy, lambda = 0, phi = 0, // center
      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, projectRotate, // rotate
      theta = null, preclip = clipAntimeridian, // clip angle
      x0 = null, y0, x1, y1, postclip = identity, // clip extent
      delta2 = 0.5, projectResample = resample(projectTransform, delta2), // precision
      cache,
      cacheStream;

  function projection(point) {
    point = projectRotate(point[0] * radians, point[1] * radians);
    return [point[0] * k + dx, dy - point[1] * k];
  }

  function invert(point) {
    point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k);
    return point && [point[0] * degrees, point[1] * degrees];
  }

  function projectTransform(x, y) {
    return x = project(x, y), [x[0] * k + dx, dy - x[1] * k];
  }

  projection.stream = function(stream) {
    return cache && cacheStream === stream ? cache : cache = transformRadians(preclip(rotate, projectResample(postclip(cacheStream = stream))));
  };

  projection.clipAngle = function(_) {
    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians, 6 * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
  };

  projection.clipExtent = function(_) {
    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
  };

  projection.scale = function(_) {
    return arguments.length ? (k = +_, recenter()) : k;
  };

  projection.translate = function(_) {
    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
  };

  projection.center = function(_) {
    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
  };

  projection.rotate = function(_) {
    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
  };

  projection.precision = function(_) {
    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
  };

  projection.fitExtent = fitExtent(projection);

  projection.fitSize = fitSize(projection);

  function recenter() {
    projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project);
    var center = project(lambda, phi);
    dx = x - center[0] * k;
    dy = y + center[1] * k;
    return reset();
  }

  function reset() {
    cache = cacheStream = null;
    return projection;
  }

  return function() {
    project = projectAt.apply(this, arguments);
    projection.invert = project.invert && invert;
    return recenter();
  };
}

function conicProjection(projectAt) {
  var phi0 = 0,
      phi1 = pi / 3,
      m = projectionMutator(projectAt),
      p = m(phi0, phi1);

  p.parallels = function(_) {
    return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees, phi1 * degrees];
  };

  return p;
}

function conicEqualAreaRaw(y0, y1) {
  var sy0 = sin(y0),
      n = (sy0 + sin(y1)) / 2,
      c = 1 + sy0 * (2 * n - sy0),
      r0 = sqrt(c) / n;

  function project(x, y) {
    var r = sqrt(c - 2 * n * sin(y)) / n;
    return [r * sin(x *= n), r0 - r * cos(x)];
  }

  project.invert = function(x, y) {
    var r0y = r0 - y;
    return [atan2(x, r0y) / n, asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
  };

  return project;
}

function conicEqualArea() {
  return conicProjection(conicEqualAreaRaw)
      .scale(155.424)
      .center([0, 33.6442]);
}

function albers() {
  return conicEqualArea()
      .parallels([29.5, 45.5])
      .scale(1070)
      .translate([480, 250])
      .rotate([96, 0])
      .center([-0.6, 38.7]);
}

// The projections must have mutually exclusive clip regions on the sphere,
// as this will avoid emitting interleaving lines and polygons.
function multiplex(streams) {
  var n = streams.length;
  return {
    point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
    sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
    lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
    lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
    polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
    polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
  };
}

// A composite projection for the United States, configured by default for
// 960×500. The projection also works quite well at 960×600 if you change the
// scale to 1285 and adjust the translate accordingly. The set of standard
// parallels for each region comes from USGS, which is published here:
// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
function albersUsa() {
  var cache,
      cacheStream,
      lower48 = albers(), lower48Point,
      alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338
      hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007
      point, pointStream = {point: function(x, y) { point = [x, y]; }};

  function albersUsa(coordinates) {
    var x = coordinates[0], y = coordinates[1];
    return point = null,
        (lower48Point.point(x, y), point)
        || (alaskaPoint.point(x, y), point)
        || (hawaiiPoint.point(x, y), point);
  }

  albersUsa.invert = function(coordinates) {
    var k = lower48.scale(),
        t = lower48.translate(),
        x = (coordinates[0] - t[0]) / k,
        y = (coordinates[1] - t[1]) / k;
    return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska
        : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii
        : lower48).invert(coordinates);
  };

  albersUsa.stream = function(stream) {
    return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
  };

  albersUsa.precision = function(_) {
    if (!arguments.length) return lower48.precision();
    lower48.precision(_), alaska.precision(_), hawaii.precision(_);
    return albersUsa;
  };

  albersUsa.scale = function(_) {
    if (!arguments.length) return lower48.scale();
    lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
    return albersUsa.translate(lower48.translate());
  };

  albersUsa.translate = function(_) {
    if (!arguments.length) return lower48.translate();
    var k = lower48.scale(), x = +_[0], y = +_[1];

    lower48Point = lower48
        .translate(_)
        .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])
        .stream(pointStream);

    alaskaPoint = alaska
        .translate([x - 0.307 * k, y + 0.201 * k])
        .clipExtent([[x - 0.425 * k + epsilon, y + 0.120 * k + epsilon], [x - 0.214 * k - epsilon, y + 0.234 * k - epsilon]])
        .stream(pointStream);

    hawaiiPoint = hawaii
        .translate([x - 0.205 * k, y + 0.212 * k])
        .clipExtent([[x - 0.214 * k + epsilon, y + 0.166 * k + epsilon], [x - 0.115 * k - epsilon, y + 0.234 * k - epsilon]])
        .stream(pointStream);

    return albersUsa;
  };

  albersUsa.fitExtent = fitExtent(albersUsa);

  albersUsa.fitSize = fitSize(albersUsa);

  return albersUsa.scale(1070);
}

function azimuthalRaw(scale) {
  return function(x, y) {
    var cx = cos(x),
        cy = cos(y),
        k = scale(cx * cy);
    return [
      k * cy * sin(x),
      k * sin(y)
    ];
  }
}

function azimuthalInvert(angle) {
  return function(x, y) {
    var z = sqrt(x * x + y * y),
        c = angle(z),
        sc = sin(c),
        cc = cos(c);
    return [
      atan2(x * sc, z * cc),
      asin(z && y * sc / z)
    ];
  }
}

var azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {
  return sqrt(2 / (1 + cxcy));
});

azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {
  return 2 * asin(z / 2);
});

function azimuthalEqualArea() {
  return projection(azimuthalEqualAreaRaw)
      .scale(124.75)
      .clipAngle(180 - 1e-3);
}

var azimuthalEquidistantRaw = azimuthalRaw(function(c) {
  return (c = acos(c)) && c / sin(c);
});

azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {
  return z;
});

function azimuthalEquidistant() {
  return projection(azimuthalEquidistantRaw)
      .scale(79.4188)
      .clipAngle(180 - 1e-3);
}

function mercatorRaw(lambda, phi) {
  return [lambda, log(tan((halfPi + phi) / 2))];
}

mercatorRaw.invert = function(x, y) {
  return [x, 2 * atan(exp(y)) - halfPi];
};

function mercator() {
  return mercatorProjection(mercatorRaw)
      .scale(961 / tau);
}

function mercatorProjection(project) {
  var m = projection(project),
      scale = m.scale,
      translate = m.translate,
      clipExtent = m.clipExtent,
      clipAuto;

  m.scale = function(_) {
    return arguments.length ? (scale(_), clipAuto && m.clipExtent(null), m) : scale();
  };

  m.translate = function(_) {
    return arguments.length ? (translate(_), clipAuto && m.clipExtent(null), m) : translate();
  };

  m.clipExtent = function(_) {
    if (!arguments.length) return clipAuto ? null : clipExtent();
    if (clipAuto = _ == null) {
      var k = pi * scale(),
          t = translate();
      _ = [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]];
    }
    clipExtent(_);
    return m;
  };

  return m.clipExtent(null);
}

function tany(y) {
  return tan((halfPi + y) / 2);
}

function conicConformalRaw(y0, y1) {
  var cy0 = cos(y0),
      n = y0 === y1 ? sin(y0) : log(cy0 / cos(y1)) / log(tany(y1) / tany(y0)),
      f = cy0 * pow(tany(y0), n) / n;

  if (!n) return mercatorRaw;

  function project(x, y) {
    if (f > 0) { if (y < -halfPi + epsilon) y = -halfPi + epsilon; }
    else { if (y > halfPi - epsilon) y = halfPi - epsilon; }
    var r = f / pow(tany(y), n);
    return [r * sin(n * x), f - r * cos(n * x)];
  }

  project.invert = function(x, y) {
    var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy);
    return [atan2(x, fy) / n, 2 * atan(pow(f / r, 1 / n)) - halfPi];
  };

  return project;
}

function conicConformal() {
  return conicProjection(conicConformalRaw)
      .scale(109.5)
      .parallels([30, 30]);
}

function equirectangularRaw(lambda, phi) {
  return [lambda, phi];
}

equirectangularRaw.invert = equirectangularRaw;

function equirectangular() {
  return projection(equirectangularRaw)
      .scale(152.63);
}

function conicEquidistantRaw(y0, y1) {
  var cy0 = cos(y0),
      n = y0 === y1 ? sin(y0) : (cy0 - cos(y1)) / (y1 - y0),
      g = cy0 / n + y0;

  if (abs(n) < epsilon) return equirectangularRaw;

  function project(x, y) {
    var gy = g - y, nx = n * x;
    return [gy * sin(nx), g - gy * cos(nx)];
  }

  project.invert = function(x, y) {
    var gy = g - y;
    return [atan2(x, gy) / n, g - sign(n) * sqrt(x * x + gy * gy)];
  };

  return project;
}

function conicEquidistant() {
  return conicProjection(conicEquidistantRaw)
      .scale(131.154)
      .center([0, 13.9389]);
}

function gnomonicRaw(x, y) {
  var cy = cos(y), k = cos(x) * cy;
  return [cy * sin(x) / k, sin(y) / k];
}

gnomonicRaw.invert = azimuthalInvert(atan);

function gnomonic() {
  return projection(gnomonicRaw)
      .scale(144.049)
      .clipAngle(60);
}

function orthographicRaw(x, y) {
  return [cos(y) * sin(x), sin(y)];
}

orthographicRaw.invert = azimuthalInvert(asin);

function orthographic() {
  return projection(orthographicRaw)
      .scale(249.5)
      .clipAngle(90 + epsilon);
}

function stereographicRaw(x, y) {
  var cy = cos(y), k = 1 + cos(x) * cy;
  return [cy * sin(x) / k, sin(y) / k];
}

stereographicRaw.invert = azimuthalInvert(function(z) {
  return 2 * atan(z);
});

function stereographic() {
  return projection(stereographicRaw)
      .scale(250)
      .clipAngle(142);
}

function transverseMercatorRaw(lambda, phi) {
  return [log(tan((halfPi + phi) / 2)), -lambda];
}

transverseMercatorRaw.invert = function(x, y) {
  return [-y, 2 * atan(exp(x)) - halfPi];
};

function transverseMercator() {
  var m = mercatorProjection(transverseMercatorRaw),
      center = m.center,
      rotate = m.rotate;

  m.center = function(_) {
    return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);
  };

  m.rotate = function(_) {
    return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);
  };

  return rotate([0, 0, 90])
      .scale(159.155);
}

exports.geoArea = area;
exports.geoBounds = bounds;
exports.geoCentroid = centroid;
exports.geoCircle = circle;
exports.geoClipExtent = extent;
exports.geoDistance = distance;
exports.geoGraticule = graticule;
exports.geoInterpolate = interpolate;
exports.geoLength = length;
exports.geoPath = index;
exports.geoAlbers = albers;
exports.geoAlbersUsa = albersUsa;
exports.geoAzimuthalEqualArea = azimuthalEqualArea;
exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;
exports.geoAzimuthalEquidistant = azimuthalEquidistant;
exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;
exports.geoConicConformal = conicConformal;
exports.geoConicConformalRaw = conicConformalRaw;
exports.geoConicEqualArea = conicEqualArea;
exports.geoConicEqualAreaRaw = conicEqualAreaRaw;
exports.geoConicEquidistant = conicEquidistant;
exports.geoConicEquidistantRaw = conicEquidistantRaw;
exports.geoEquirectangular = equirectangular;
exports.geoEquirectangularRaw = equirectangularRaw;
exports.geoGnomonic = gnomonic;
exports.geoGnomonicRaw = gnomonicRaw;
exports.geoProjection = projection;
exports.geoProjectionMutator = projectionMutator;
exports.geoMercator = mercator;
exports.geoMercatorRaw = mercatorRaw;
exports.geoOrthographic = orthographic;
exports.geoOrthographicRaw = orthographicRaw;
exports.geoStereographic = stereographic;
exports.geoStereographicRaw = stereographicRaw;
exports.geoTransverseMercator = transverseMercator;
exports.geoTransverseMercatorRaw = transverseMercatorRaw;
exports.geoRotation = rotation;
exports.geoStream = geoStream;
exports.geoTransform = transform;

Object.defineProperty(exports, '__esModule', { value: true });

})));
},{"d3-array":2}],7:[function(require,module,exports){
// https://d3js.org/d3-dispatch/ Version 1.0.1. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.d3 = global.d3 || {})));
}(this, function (exports) { 'use strict';

  var noop = {value: function() {}};

  function dispatch() {
    for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
      if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
      _[t] = [];
    }
    return new Dispatch(_);
  }

  function Dispatch(_) {
    this._ = _;
  }

  function parseTypenames(typenames, types) {
    return typenames.trim().split(/^|\s+/).map(function(t) {
      var name = "", i = t.indexOf(".");
      if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
      if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
      return {type: t, name: name};
    });
  }

  Dispatch.prototype = dispatch.prototype = {
    constructor: Dispatch,
    on: function(typename, callback) {
      var _ = this._,
          T = parseTypenames(typename + "", _),
          t,
          i = -1,
          n = T.length;

      // If no callback was specified, return the callback of the given type and name.
      if (arguments.length < 2) {
        while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
        return;
      }

      // If a type was specified, set the callback for the given type and name.
      // Otherwise, if a null callback was specified, remove callbacks of the given name.
      if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
      while (++i < n) {
        if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);
        else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);
      }

      return this;
    },
    copy: function() {
      var copy = {}, _ = this._;
      for (var t in _) copy[t] = _[t].slice();
      return new Dispatch(copy);
    },
    call: function(type, that) {
      if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
      for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
    },
    apply: function(type, that, args) {
      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
      for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
    }
  };

  function get(type, name) {
    for (var i = 0, n = type.length, c; i < n; ++i) {
      if ((c = type[i]).name === name) {
        return c.value;
      }
    }
  }

  function set(type, name, callback) {
    for (var i = 0, n = type.length; i < n; ++i) {
      if (type[i].name === name) {
        type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
        break;
      }
    }
    if (callback != null) type.push({name: name, value: callback});
    return type;
  }

  exports.dispatch = dispatch;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
},{}],8:[function(require,module,exports){
// https://d3js.org/d3-dsv/ Version 1.0.3. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.d3 = global.d3 || {})));
}(this, (function (exports) { 'use strict';

function objectConverter(columns) {
  return new Function("d", "return {" + columns.map(function(name, i) {
    return JSON.stringify(name) + ": d[" + i + "]";
  }).join(",") + "}");
}

function customConverter(columns, f) {
  var object = objectConverter(columns);
  return function(row, i) {
    return f(object(row), i, columns);
  };
}

// Compute unique columns in order of discovery.
function inferColumns(rows) {
  var columnSet = Object.create(null),
      columns = [];

  rows.forEach(function(row) {
    for (var column in row) {
      if (!(column in columnSet)) {
        columns.push(columnSet[column] = column);
      }
    }
  });

  return columns;
}

function dsv(delimiter) {
  var reFormat = new RegExp("[\"" + delimiter + "\n]"),
      delimiterCode = delimiter.charCodeAt(0);

  function parse(text, f) {
    var convert, columns, rows = parseRows(text, function(row, i) {
      if (convert) return convert(row, i - 1);
      columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
    });
    rows.columns = columns;
    return rows;
  }

  function parseRows(text, f) {
    var EOL = {}, // sentinel value for end-of-line
        EOF = {}, // sentinel value for end-of-file
        rows = [], // output rows
        N = text.length,
        I = 0, // current character index
        n = 0, // the current line number
        t, // the current token
        eol; // is the current token followed by EOL?

    function token() {
      if (I >= N) return EOF; // special case: end of file
      if (eol) return eol = false, EOL; // special case: end of line

      // special case: quotes
      var j = I, c;
      if (text.charCodeAt(j) === 34) {
        var i = j;
        while (i++ < N) {
          if (text.charCodeAt(i) === 34) {
            if (text.charCodeAt(i + 1) !== 34) break;
            ++i;
          }
        }
        I = i + 2;
        c = text.charCodeAt(i + 1);
        if (c === 13) {
          eol = true;
          if (text.charCodeAt(i + 2) === 10) ++I;
        } else if (c === 10) {
          eol = true;
        }
        return text.slice(j + 1, i).replace(/""/g, "\"");
      }

      // common case: find next delimiter or newline
      while (I < N) {
        var k = 1;
        c = text.charCodeAt(I++);
        if (c === 10) eol = true; // \n
        else if (c === 13) { eol = true; if (text.charCodeAt(I) === 10) ++I, ++k; } // \r|\r\n
        else if (c !== delimiterCode) continue;
        return text.slice(j, I - k);
      }

      // special case: last token before EOF
      return text.slice(j);
    }

    while ((t = token()) !== EOF) {
      var a = [];
      while (t !== EOL && t !== EOF) {
        a.push(t);
        t = token();
      }
      if (f && (a = f(a, n++)) == null) continue;
      rows.push(a);
    }

    return rows;
  }

  function format(rows, columns) {
    if (columns == null) columns = inferColumns(rows);
    return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) {
      return columns.map(function(column) {
        return formatValue(row[column]);
      }).join(delimiter);
    })).join("\n");
  }

  function formatRows(rows) {
    return rows.map(formatRow).join("\n");
  }

  function formatRow(row) {
    return row.map(formatValue).join(delimiter);
  }

  function formatValue(text) {
    return text == null ? ""
        : reFormat.test(text += "") ? "\"" + text.replace(/\"/g, "\"\"") + "\""
        : text;
  }

  return {
    parse: parse,
    parseRows: parseRows,
    format: format,
    formatRows: formatRows
  };
}

var csv = dsv(",");

var csvParse = csv.parse;
var csvParseRows = csv.parseRows;
var csvFormat = csv.format;
var csvFormatRows = csv.formatRows;

var tsv = dsv("\t");

var tsvParse = tsv.parse;
var tsvParseRows = tsv.parseRows;
var tsvFormat = tsv.format;
var tsvFormatRows = tsv.formatRows;

exports.dsvFormat = dsv;
exports.csvParse = csvParse;
exports.csvParseRows = csvParseRows;
exports.csvFormat = csvFormat;
exports.csvFormatRows = csvFormatRows;
exports.tsvParse = tsvParse;
exports.tsvParseRows = tsvParseRows;
exports.tsvFormat = tsvFormat;
exports.tsvFormatRows = tsvFormatRows;

Object.defineProperty(exports, '__esModule', { value: true });

})));
},{}],9:[function(require,module,exports){
// https://d3js.org/d3-ease/ Version 1.0.1. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.d3 = global.d3 || {})));
}(this, function (exports) { 'use strict';

  function linear(t) {
    return +t;
  }

  function quadIn(t) {
    return t * t;
  }

  function quadOut(t) {
    return t * (2 - t);
  }

  function quadInOut(t) {
    return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;
  }

  function cubicIn(t) {
    return t * t * t;
  }

  function cubicOut(t) {
    return --t * t * t + 1;
  }

  function cubicInOut(t) {
    return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
  }

  var exponent = 3;

  var polyIn = (function custom(e) {
    e = +e;

    function polyIn(t) {
      return Math.pow(t, e);
    }

    polyIn.exponent = custom;

    return polyIn;
  })(exponent);

  var polyOut = (function custom(e) {
    e = +e;

    function polyOut(t) {
      return 1 - Math.pow(1 - t, e);
    }

    polyOut.exponent = custom;

    return polyOut;
  })(exponent);

  var polyInOut = (function custom(e) {
    e = +e;

    function polyInOut(t) {
      return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;
    }

    polyInOut.exponent = custom;

    return polyInOut;
  })(exponent);

  var pi = Math.PI;
  var halfPi = pi / 2;
  function sinIn(t) {
    return 1 - Math.cos(t * halfPi);
  }

  function sinOut(t) {
    return Math.sin(t * halfPi);
  }

  function sinInOut(t) {
    return (1 - Math.cos(pi * t)) / 2;
  }

  function expIn(t) {
    return Math.pow(2, 10 * t - 10);
  }

  function expOut(t) {
    return 1 - Math.pow(2, -10 * t);
  }

  function expInOut(t) {
    return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;
  }

  function circleIn(t) {
    return 1 - Math.sqrt(1 - t * t);
  }

  function circleOut(t) {
    return Math.sqrt(1 - --t * t);
  }

  function circleInOut(t) {
    return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
  }

  var b1 = 4 / 11;
  var b2 = 6 / 11;
  var b3 = 8 / 11;
  var b4 = 3 / 4;
  var b5 = 9 / 11;
  var b6 = 10 / 11;
  var b7 = 15 / 16;
  var b8 = 21 / 22;
  var b9 = 63 / 64;
  var b0 = 1 / b1 / b1;
  function bounceIn(t) {
    return 1 - bounceOut(1 - t);
  }

  function bounceOut(t) {
    return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;
  }

  function bounceInOut(t) {
    return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;
  }

  var overshoot = 1.70158;

  var backIn = (function custom(s) {
    s = +s;

    function backIn(t) {
      return t * t * ((s + 1) * t - s);
    }

    backIn.overshoot = custom;

    return backIn;
  })(overshoot);

  var backOut = (function custom(s) {
    s = +s;

    function backOut(t) {
      return --t * t * ((s + 1) * t + s) + 1;
    }

    backOut.overshoot = custom;

    return backOut;
  })(overshoot);

  var backInOut = (function custom(s) {
    s = +s;

    function backInOut(t) {
      return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
    }

    backInOut.overshoot = custom;

    return backInOut;
  })(overshoot);

  var tau = 2 * Math.PI;
  var amplitude = 1;
  var period = 0.3;
  var elasticIn = (function custom(a, p) {
    var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

    function elasticIn(t) {
      return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);
    }

    elasticIn.amplitude = function(a) { return custom(a, p * tau); };
    elasticIn.period = function(p) { return custom(a, p); };

    return elasticIn;
  })(amplitude, period);

  var elasticOut = (function custom(a, p) {
    var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

    function elasticOut(t) {
      return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);
    }

    elasticOut.amplitude = function(a) { return custom(a, p * tau); };
    elasticOut.period = function(p) { return custom(a, p); };

    return elasticOut;
  })(amplitude, period);

  var elasticInOut = (function custom(a, p) {
    var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);

    function elasticInOut(t) {
      return ((t = t * 2 - 1) < 0
          ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p)
          : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;
    }

    elasticInOut.amplitude = function(a) { return custom(a, p * tau); };
    elasticInOut.period = function(p) { return custom(a, p); };

    return elasticInOut;
  })(amplitude, period);

  exports.easeLinear = linear;
  exports.easeQuad = quadInOut;
  exports.easeQuadIn = quadIn;
  exports.easeQuadOut = quadOut;
  exports.easeQuadInOut = quadInOut;
  exports.easeCubic = cubicInOut;
  exports.easeCubicIn = cubicIn;
  exports.easeCubicOut = cubicOut;
  exports.easeCubicInOut = cubicInOut;
  exports.easePoly = polyInOut;
  exports.easePolyIn = polyIn;
  exports.easePolyOut = polyOut;
  exports.easePolyInOut = polyInOut;
  exports.easeSin = sinInOut;
  exports.easeSinIn = sinIn;
  exports.easeSinOut = sinOut;
  exports.easeSinInOut = sinInOut;
  exports.easeExp = expInOut;
  exports.easeExpIn = expIn;
  exports.easeExpOut = expOut;
  exports.easeExpInOut = expInOut;
  exports.easeCircle = circleInOut;
  exports.easeCircleIn = circleIn;
  exports.easeCircleOut = circleOut;
  exports.easeCircleInOut = circleInOut;
  exports.easeBounce = bounceOut;
  exports.easeBounceIn = bounceIn;
  exports.easeBounceOut = bounceOut;
  exports.easeBounceInOut = bounceInOut;
  exports.easeBack = backInOut;
  exports.easeBackIn = backIn;
  exports.easeBackOut = backOut;
  exports.easeBackInOut = backInOut;
  exports.easeElastic = elasticOut;
  exports.easeElasticIn = elasticIn;
  exports.easeElasticOut = elasticOut;
  exports.easeElasticInOut = elasticInOut;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
},{}],10:[function(require,module,exports){
// https://d3js.org/d3-geo/ Version 1.2.5. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-array')) :
  typeof define === 'function' && define.amd ? define(['exports', 'd3-array'], factory) :
  (factory((global.d3 = global.d3 || {}),global.d3));
}(this, (function (exports,d3Array) { 'use strict';

// Adds floating point numbers with twice the normal precision.
// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
// 305–363 (1997).
// Code adapted from GeographicLib by Charles F. F. Karney,
// http://geographiclib.sourceforge.net/

var adder = function() {
  return new Adder;
}

function Adder() {
  this.reset();
}

Adder.prototype = {
  constructor: Adder,
  reset: function() {
    this.s = // rounded value
    this.t = 0; // exact error
  },
  add: function(y) {
    add(temp, y, this.t);
    add(this, temp.s, this.s);
    if (this.s) this.t += temp.t;
    else this.s = temp.t;
  },
  valueOf: function() {
    return this.s;
  }
};

var temp = new Adder;

function add(adder, a, b) {
  var x = adder.s = a + b,
      bv = x - a,
      av = x - bv;
  adder.t = (a - av) + (b - bv);
}

var epsilon = 1e-6;
var epsilon2 = 1e-12;
var pi = Math.PI;
var halfPi = pi / 2;
var quarterPi = pi / 4;
var tau = pi * 2;

var degrees = 180 / pi;
var radians = pi / 180;

var abs = Math.abs;
var atan = Math.atan;
var atan2 = Math.atan2;
var cos = Math.cos;
var ceil = Math.ceil;
var exp = Math.exp;

var log = Math.log;
var pow = Math.pow;
var sin = Math.sin;
var sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
var sqrt = Math.sqrt;
var tan = Math.tan;

function acos(x) {
  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
}

function asin(x) {
  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
}

function haversin(x) {
  return (x = sin(x / 2)) * x;
}

function noop() {}

function streamGeometry(geometry, stream) {
  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
    streamGeometryType[geometry.type](geometry, stream);
  }
}

var streamObjectType = {
  Feature: function(feature, stream) {
    streamGeometry(feature.geometry, stream);
  },
  FeatureCollection: function(object, stream) {
    var features = object.features, i = -1, n = features.length;
    while (++i < n) streamGeometry(features[i].geometry, stream);
  }
};

var streamGeometryType = {
  Sphere: function(object, stream) {
    stream.sphere();
  },
  Point: function(object, stream) {
    object = object.coordinates;
    stream.point(object[0], object[1], object[2]);
  },
  MultiPoint: function(object, stream) {
    var coordinates = object.coordinates, i = -1, n = coordinates.length;
    while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);
  },
  LineString: function(object, stream) {
    streamLine(object.coordinates, stream, 0);
  },
  MultiLineString: function(object, stream) {
    var coordinates = object.coordinates, i = -1, n = coordinates.length;
    while (++i < n) streamLine(coordinates[i], stream, 0);
  },
  Polygon: function(object, stream) {
    streamPolygon(object.coordinates, stream);
  },
  MultiPolygon: function(object, stream) {
    var coordinates = object.coordinates, i = -1, n = coordinates.length;
    while (++i < n) streamPolygon(coordinates[i], stream);
  },
  GeometryCollection: function(object, stream) {
    var geometries = object.geometries, i = -1, n = geometries.length;
    while (++i < n) streamGeometry(geometries[i], stream);
  }
};

function streamLine(coordinates, stream, closed) {
  var i = -1, n = coordinates.length - closed, coordinate;
  stream.lineStart();
  while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
  stream.lineEnd();
}

function streamPolygon(coordinates, stream) {
  var i = -1, n = coordinates.length;
  stream.polygonStart();
  while (++i < n) streamLine(coordinates[i], stream, 1);
  stream.polygonEnd();
}

var geoStream = function(object, stream) {
  if (object && streamObjectType.hasOwnProperty(object.type)) {
    streamObjectType[object.type](object, stream);
  } else {
    streamGeometry(object, stream);
  }
}

var areaRingSum = adder();

var areaSum = adder();
var lambda00;
var phi00;
var lambda0;
var cosPhi0;
var sinPhi0;

var areaStream = {
  point: noop,
  lineStart: noop,
  lineEnd: noop,
  polygonStart: function() {
    areaRingSum.reset();
    areaStream.lineStart = areaRingStart;
    areaStream.lineEnd = areaRingEnd;
  },
  polygonEnd: function() {
    var areaRing = +areaRingSum;
    areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
    this.lineStart = this.lineEnd = this.point = noop;
  },
  sphere: function() {
    areaSum.add(tau);
  }
};

function areaRingStart() {
  areaStream.point = areaPointFirst;
}

function areaRingEnd() {
  areaPoint(lambda00, phi00);
}

function areaPointFirst(lambda, phi) {
  areaStream.point = areaPoint;
  lambda00 = lambda, phi00 = phi;
  lambda *= radians, phi *= radians;
  lambda0 = lambda, cosPhi0 = cos(phi = phi / 2 + quarterPi), sinPhi0 = sin(phi);
}

function areaPoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  phi = phi / 2 + quarterPi; // half the angular distance from south pole

  // Spherical excess E for a spherical triangle with vertices: south pole,
  // previous point, current point.  Uses a formula derived from Cagnoli’s
  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
  var dLambda = lambda - lambda0,
      sdLambda = dLambda >= 0 ? 1 : -1,
      adLambda = sdLambda * dLambda,
      cosPhi = cos(phi),
      sinPhi = sin(phi),
      k = sinPhi0 * sinPhi,
      u = cosPhi0 * cosPhi + k * cos(adLambda),
      v = k * sdLambda * sin(adLambda);
  areaRingSum.add(atan2(v, u));

  // Advance the previous points.
  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
}

var area = function(object) {
  areaSum.reset();
  geoStream(object, areaStream);
  return areaSum * 2;
}

function spherical(cartesian) {
  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
}

function cartesian(spherical) {
  var lambda = spherical[0], phi = spherical[1], cosPhi = cos(phi);
  return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
}

function cartesianDot(a, b) {
  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}

function cartesianCross(a, b) {
  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
}

// TODO return a
function cartesianAddInPlace(a, b) {
  a[0] += b[0], a[1] += b[1], a[2] += b[2];
}

function cartesianScale(vector, k) {
  return [vector[0] * k, vector[1] * k, vector[2] * k];
}

// TODO return d
function cartesianNormalizeInPlace(d) {
  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
  d[0] /= l, d[1] /= l, d[2] /= l;
}

var lambda0$1;
var phi0;
var lambda1;
var phi1;
var lambda2;
var lambda00$1;
var phi00$1;
var p0;
var deltaSum = adder();
var ranges;
var range$1;

var boundsStream = {
  point: boundsPoint,
  lineStart: boundsLineStart,
  lineEnd: boundsLineEnd,
  polygonStart: function() {
    boundsStream.point = boundsRingPoint;
    boundsStream.lineStart = boundsRingStart;
    boundsStream.lineEnd = boundsRingEnd;
    deltaSum.reset();
    areaStream.polygonStart();
  },
  polygonEnd: function() {
    areaStream.polygonEnd();
    boundsStream.point = boundsPoint;
    boundsStream.lineStart = boundsLineStart;
    boundsStream.lineEnd = boundsLineEnd;
    if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
    else if (deltaSum > epsilon) phi1 = 90;
    else if (deltaSum < -epsilon) phi0 = -90;
    range$1[0] = lambda0$1, range$1[1] = lambda1;
  }
};

function boundsPoint(lambda, phi) {
  ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
  if (phi < phi0) phi0 = phi;
  if (phi > phi1) phi1 = phi;
}

function linePoint(lambda, phi) {
  var p = cartesian([lambda * radians, phi * radians]);
  if (p0) {
    var normal = cartesianCross(p0, p),
        equatorial = [normal[1], -normal[0], 0],
        inflection = cartesianCross(equatorial, normal);
    cartesianNormalizeInPlace(inflection);
    inflection = spherical(inflection);
    var delta = lambda - lambda2,
        sign$$1 = delta > 0 ? 1 : -1,
        lambdai = inflection[0] * degrees * sign$$1,
        phii,
        antimeridian = abs(delta) > 180;
    if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
      phii = inflection[1] * degrees;
      if (phii > phi1) phi1 = phii;
    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
      phii = -inflection[1] * degrees;
      if (phii < phi0) phi0 = phii;
    } else {
      if (phi < phi0) phi0 = phi;
      if (phi > phi1) phi1 = phi;
    }
    if (antimeridian) {
      if (lambda < lambda2) {
        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
      } else {
        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
      }
    } else {
      if (lambda1 >= lambda0$1) {
        if (lambda < lambda0$1) lambda0$1 = lambda;
        if (lambda > lambda1) lambda1 = lambda;
      } else {
        if (lambda > lambda2) {
          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
        } else {
          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
        }
      }
    }
  } else {
    boundsPoint(lambda, phi);
  }
  p0 = p, lambda2 = lambda;
}

function boundsLineStart() {
  boundsStream.point = linePoint;
}

function boundsLineEnd() {
  range$1[0] = lambda0$1, range$1[1] = lambda1;
  boundsStream.point = boundsPoint;
  p0 = null;
}

function boundsRingPoint(lambda, phi) {
  if (p0) {
    var delta = lambda - lambda2;
    deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
  } else {
    lambda00$1 = lambda, phi00$1 = phi;
  }
  areaStream.point(lambda, phi);
  linePoint(lambda, phi);
}

function boundsRingStart() {
  areaStream.lineStart();
}

function boundsRingEnd() {
  boundsRingPoint(lambda00$1, phi00$1);
  areaStream.lineEnd();
  if (abs(deltaSum) > epsilon) lambda0$1 = -(lambda1 = 180);
  range$1[0] = lambda0$1, range$1[1] = lambda1;
  p0 = null;
}

// Finds the left-right distance between two longitudes.
// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
// the distance between ±180° to be 360°.
function angle(lambda0, lambda1) {
  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
}

function rangeCompare(a, b) {
  return a[0] - b[0];
}

function rangeContains(range$$1, x) {
  return range$$1[0] <= range$$1[1] ? range$$1[0] <= x && x <= range$$1[1] : x < range$$1[0] || range$$1[1] < x;
}

var bounds = function(feature) {
  var i, n, a, b, merged, deltaMax, delta;

  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
  ranges = [];
  geoStream(feature, boundsStream);

  // First, sort ranges by their minimum longitudes.
  if (n = ranges.length) {
    ranges.sort(rangeCompare);

    // Then, merge any ranges that overlap.
    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
      b = ranges[i];
      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
      } else {
        merged.push(a = b);
      }
    }

    // Finally, find the largest gap between the merged ranges.
    // The final bounding box will be the inverse of this gap.
    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
      b = merged[i];
      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
    }
  }

  ranges = range$1 = null;

  return lambda0$1 === Infinity || phi0 === Infinity
      ? [[NaN, NaN], [NaN, NaN]]
      : [[lambda0$1, phi0], [lambda1, phi1]];
}

var W0;
var W1;
var X0;
var Y0;
var Z0;
var X1;
var Y1;
var Z1;
var X2;
var Y2;
var Z2;
var lambda00$2;
var phi00$2;
var x0;
var y0;
var z0; // previous point

var centroidStream = {
  sphere: noop,
  point: centroidPoint,
  lineStart: centroidLineStart,
  lineEnd: centroidLineEnd,
  polygonStart: function() {
    centroidStream.lineStart = centroidRingStart;
    centroidStream.lineEnd = centroidRingEnd;
  },
  polygonEnd: function() {
    centroidStream.lineStart = centroidLineStart;
    centroidStream.lineEnd = centroidLineEnd;
  }
};

// Arithmetic mean of Cartesian vectors.
function centroidPoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  var cosPhi = cos(phi);
  centroidPointCartesian(cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi));
}

function centroidPointCartesian(x, y, z) {
  ++W0;
  X0 += (x - X0) / W0;
  Y0 += (y - Y0) / W0;
  Z0 += (z - Z0) / W0;
}

function centroidLineStart() {
  centroidStream.point = centroidLinePointFirst;
}

function centroidLinePointFirst(lambda, phi) {
  lambda *= radians, phi *= radians;
  var cosPhi = cos(phi);
  x0 = cosPhi * cos(lambda);
  y0 = cosPhi * sin(lambda);
  z0 = sin(phi);
  centroidStream.point = centroidLinePoint;
  centroidPointCartesian(x0, y0, z0);
}

function centroidLinePoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  var cosPhi = cos(phi),
      x = cosPhi * cos(lambda),
      y = cosPhi * sin(lambda),
      z = sin(phi),
      w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
  W1 += w;
  X1 += w * (x0 + (x0 = x));
  Y1 += w * (y0 + (y0 = y));
  Z1 += w * (z0 + (z0 = z));
  centroidPointCartesian(x0, y0, z0);
}

function centroidLineEnd() {
  centroidStream.point = centroidPoint;
}

// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
// J. Applied Mechanics 42, 239 (1975).
function centroidRingStart() {
  centroidStream.point = centroidRingPointFirst;
}

function centroidRingEnd() {
  centroidRingPoint(lambda00$2, phi00$2);
  centroidStream.point = centroidPoint;
}

function centroidRingPointFirst(lambda, phi) {
  lambda00$2 = lambda, phi00$2 = phi;
  lambda *= radians, phi *= radians;
  centroidStream.point = centroidRingPoint;
  var cosPhi = cos(phi);
  x0 = cosPhi * cos(lambda);
  y0 = cosPhi * sin(lambda);
  z0 = sin(phi);
  centroidPointCartesian(x0, y0, z0);
}

function centroidRingPoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  var cosPhi = cos(phi),
      x = cosPhi * cos(lambda),
      y = cosPhi * sin(lambda),
      z = sin(phi),
      cx = y0 * z - z0 * y,
      cy = z0 * x - x0 * z,
      cz = x0 * y - y0 * x,
      m = sqrt(cx * cx + cy * cy + cz * cz),
      u = x0 * x + y0 * y + z0 * z,
      v = m && -acos(u) / m, // area weight
      w = atan2(m, u); // line weight
  X2 += v * cx;
  Y2 += v * cy;
  Z2 += v * cz;
  W1 += w;
  X1 += w * (x0 + (x0 = x));
  Y1 += w * (y0 + (y0 = y));
  Z1 += w * (z0 + (z0 = z));
  centroidPointCartesian(x0, y0, z0);
}

var centroid = function(object) {
  W0 = W1 =
  X0 = Y0 = Z0 =
  X1 = Y1 = Z1 =
  X2 = Y2 = Z2 = 0;
  geoStream(object, centroidStream);

  var x = X2,
      y = Y2,
      z = Z2,
      m = x * x + y * y + z * z;

  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
  if (m < epsilon2) {
    x = X1, y = Y1, z = Z1;
    // If the feature has zero length, fall back to arithmetic mean of point vectors.
    if (W1 < epsilon) x = X0, y = Y0, z = Z0;
    m = x * x + y * y + z * z;
    // If the feature still has an undefined ccentroid, then return.
    if (m < epsilon2) return [NaN, NaN];
  }

  return [atan2(y, x) * degrees, asin(z / sqrt(m)) * degrees];
}

var constant = function(x) {
  return function() {
    return x;
  };
}

var compose = function(a, b) {

  function compose(x, y) {
    return x = a(x, y), b(x[0], x[1]);
  }

  if (a.invert && b.invert) compose.invert = function(x, y) {
    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
  };

  return compose;
}

function rotationIdentity(lambda, phi) {
  return [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
}

rotationIdentity.invert = rotationIdentity;

function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
  return (deltaLambda %= tau) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
    : rotationLambda(deltaLambda))
    : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
    : rotationIdentity);
}

function forwardRotationLambda(deltaLambda) {
  return function(lambda, phi) {
    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
  };
}

function rotationLambda(deltaLambda) {
  var rotation = forwardRotationLambda(deltaLambda);
  rotation.invert = forwardRotationLambda(-deltaLambda);
  return rotation;
}

function rotationPhiGamma(deltaPhi, deltaGamma) {
  var cosDeltaPhi = cos(deltaPhi),
      sinDeltaPhi = sin(deltaPhi),
      cosDeltaGamma = cos(deltaGamma),
      sinDeltaGamma = sin(deltaGamma);

  function rotation(lambda, phi) {
    var cosPhi = cos(phi),
        x = cos(lambda) * cosPhi,
        y = sin(lambda) * cosPhi,
        z = sin(phi),
        k = z * cosDeltaPhi + x * sinDeltaPhi;
    return [
      atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
      asin(k * cosDeltaGamma + y * sinDeltaGamma)
    ];
  }

  rotation.invert = function(lambda, phi) {
    var cosPhi = cos(phi),
        x = cos(lambda) * cosPhi,
        y = sin(lambda) * cosPhi,
        z = sin(phi),
        k = z * cosDeltaGamma - y * sinDeltaGamma;
    return [
      atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
      asin(k * cosDeltaPhi - x * sinDeltaPhi)
    ];
  };

  return rotation;
}

var rotation = function(rotate) {
  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);

  function forward(coordinates) {
    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
  }

  forward.invert = function(coordinates) {
    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
  };

  return forward;
}

// Generates a circle centered at [0°, 0°], with a given radius and precision.
function circleStream(stream, radius, delta, direction, t0, t1) {
  if (!delta) return;
  var cosRadius = cos(radius),
      sinRadius = sin(radius),
      step = direction * delta;
  if (t0 == null) {
    t0 = radius + direction * tau;
    t1 = radius - step / 2;
  } else {
    t0 = circleRadius(cosRadius, t0);
    t1 = circleRadius(cosRadius, t1);
    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau;
  }
  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
    point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
    stream.point(point[0], point[1]);
  }
}

// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
function circleRadius(cosRadius, point) {
  point = cartesian(point), point[0] -= cosRadius;
  cartesianNormalizeInPlace(point);
  var radius = acos(-point[1]);
  return ((-point[2] < 0 ? -radius : radius) + tau - epsilon) % tau;
}

var circle = function() {
  var center = constant([0, 0]),
      radius = constant(90),
      precision = constant(6),
      ring,
      rotate,
      stream = {point: point};

  function point(x, y) {
    ring.push(x = rotate(x, y));
    x[0] *= degrees, x[1] *= degrees;
  }

  function circle() {
    var c = center.apply(this, arguments),
        r = radius.apply(this, arguments) * radians,
        p = precision.apply(this, arguments) * radians;
    ring = [];
    rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;
    circleStream(stream, r, p, 1);
    c = {type: "Polygon", coordinates: [ring]};
    ring = rotate = null;
    return c;
  }

  circle.center = function(_) {
    return arguments.length ? (center = typeof _ === "function" ? _ : constant([+_[0], +_[1]]), circle) : center;
  };

  circle.radius = function(_) {
    return arguments.length ? (radius = typeof _ === "function" ? _ : constant(+_), circle) : radius;
  };

  circle.precision = function(_) {
    return arguments.length ? (precision = typeof _ === "function" ? _ : constant(+_), circle) : precision;
  };

  return circle;
}

var clipBuffer = function() {
  var lines = [],
      line;
  return {
    point: function(x, y) {
      line.push([x, y]);
    },
    lineStart: function() {
      lines.push(line = []);
    },
    lineEnd: noop,
    rejoin: function() {
      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
    },
    result: function() {
      var result = lines;
      lines = [];
      line = null;
      return result;
    }
  };
}

var clipLine = function(a, b, x0, y0, x1, y1) {
  var ax = a[0],
      ay = a[1],
      bx = b[0],
      by = b[1],
      t0 = 0,
      t1 = 1,
      dx = bx - ax,
      dy = by - ay,
      r;

  r = x0 - ax;
  if (!dx && r > 0) return;
  r /= dx;
  if (dx < 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  } else if (dx > 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  }

  r = x1 - ax;
  if (!dx && r < 0) return;
  r /= dx;
  if (dx < 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  } else if (dx > 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  }

  r = y0 - ay;
  if (!dy && r > 0) return;
  r /= dy;
  if (dy < 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  } else if (dy > 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  }

  r = y1 - ay;
  if (!dy && r < 0) return;
  r /= dy;
  if (dy < 0) {
    if (r > t1) return;
    if (r > t0) t0 = r;
  } else if (dy > 0) {
    if (r < t0) return;
    if (r < t1) t1 = r;
  }

  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
  return true;
}

var pointEqual = function(a, b) {
  return abs(a[0] - b[0]) < epsilon && abs(a[1] - b[1]) < epsilon;
}

function Intersection(point, points, other, entry) {
  this.x = point;
  this.z = points;
  this.o = other; // another intersection
  this.e = entry; // is an entry?
  this.v = false; // visited
  this.n = this.p = null; // next & previous
}

// A generalized polygon clipping algorithm: given a polygon that has been cut
// into its visible line segments, and rejoins the segments by interpolating
// along the clip edge.
var clipPolygon = function(segments, compareIntersection, startInside, interpolate, stream) {
  var subject = [],
      clip = [],
      i,
      n;

  segments.forEach(function(segment) {
    if ((n = segment.length - 1) <= 0) return;
    var n, p0 = segment[0], p1 = segment[n], x;

    // If the first and last points of a segment are coincident, then treat as a
    // closed ring. TODO if all rings are closed, then the winding order of the
    // exterior ring should be checked.
    if (pointEqual(p0, p1)) {
      stream.lineStart();
      for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);
      stream.lineEnd();
      return;
    }

    subject.push(x = new Intersection(p0, segment, null, true));
    clip.push(x.o = new Intersection(p0, null, x, false));
    subject.push(x = new Intersection(p1, segment, null, false));
    clip.push(x.o = new Intersection(p1, null, x, true));
  });

  if (!subject.length) return;

  clip.sort(compareIntersection);
  link(subject);
  link(clip);

  for (i = 0, n = clip.length; i < n; ++i) {
    clip[i].e = startInside = !startInside;
  }

  var start = subject[0],
      points,
      point;

  while (1) {
    // Find first unvisited intersection.
    var current = start,
        isSubject = true;
    while (current.v) if ((current = current.n) === start) return;
    points = current.z;
    stream.lineStart();
    do {
      current.v = current.o.v = true;
      if (current.e) {
        if (isSubject) {
          for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);
        } else {
          interpolate(current.x, current.n.x, 1, stream);
        }
        current = current.n;
      } else {
        if (isSubject) {
          points = current.p.z;
          for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);
        } else {
          interpolate(current.x, current.p.x, -1, stream);
        }
        current = current.p;
      }
      current = current.o;
      points = current.z;
      isSubject = !isSubject;
    } while (!current.v);
    stream.lineEnd();
  }
}

function link(array) {
  if (!(n = array.length)) return;
  var n,
      i = 0,
      a = array[0],
      b;
  while (++i < n) {
    a.n = b = array[i];
    b.p = a;
    a = b;
  }
  a.n = b = array[0];
  b.p = a;
}

var clipMax = 1e9;
var clipMin = -clipMax;

// TODO Use d3-polygon’s polygonContains here for the ring check?
// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?

function clipExtent(x0, y0, x1, y1) {

  function visible(x, y) {
    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
  }

  function interpolate(from, to, direction, stream) {
    var a = 0, a1 = 0;
    if (from == null
        || (a = corner(from, direction)) !== (a1 = corner(to, direction))
        || comparePoint(from, to) < 0 ^ direction > 0) {
      do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
      while ((a = (a + direction + 4) % 4) !== a1);
    } else {
      stream.point(to[0], to[1]);
    }
  }

  function corner(p, direction) {
    return abs(p[0] - x0) < epsilon ? direction > 0 ? 0 : 3
        : abs(p[0] - x1) < epsilon ? direction > 0 ? 2 : 1
        : abs(p[1] - y0) < epsilon ? direction > 0 ? 1 : 0
        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
  }

  function compareIntersection(a, b) {
    return comparePoint(a.x, b.x);
  }

  function comparePoint(a, b) {
    var ca = corner(a, 1),
        cb = corner(b, 1);
    return ca !== cb ? ca - cb
        : ca === 0 ? b[1] - a[1]
        : ca === 1 ? a[0] - b[0]
        : ca === 2 ? a[1] - b[1]
        : b[0] - a[0];
  }

  return function(stream) {
    var activeStream = stream,
        bufferStream = clipBuffer(),
        segments,
        polygon,
        ring,
        x__, y__, v__, // first point
        x_, y_, v_, // previous point
        first,
        clean;

    var clipStream = {
      point: point,
      lineStart: lineStart,
      lineEnd: lineEnd,
      polygonStart: polygonStart,
      polygonEnd: polygonEnd
    };

    function point(x, y) {
      if (visible(x, y)) activeStream.point(x, y);
    }

    function polygonInside() {
      var winding = 0;

      for (var i = 0, n = polygon.length; i < n; ++i) {
        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }
          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }
        }
      }

      return winding;
    }

    // Buffer geometry within a polygon and then clip it en masse.
    function polygonStart() {
      activeStream = bufferStream, segments = [], polygon = [], clean = true;
    }

    function polygonEnd() {
      var startInside = polygonInside(),
          cleanInside = clean && startInside,
          visible = (segments = d3Array.merge(segments)).length;
      if (cleanInside || visible) {
        stream.polygonStart();
        if (cleanInside) {
          stream.lineStart();
          interpolate(null, null, 1, stream);
          stream.lineEnd();
        }
        if (visible) {
          clipPolygon(segments, compareIntersection, startInside, interpolate, stream);
        }
        stream.polygonEnd();
      }
      activeStream = stream, segments = polygon = ring = null;
    }

    function lineStart() {
      clipStream.point = linePoint;
      if (polygon) polygon.push(ring = []);
      first = true;
      v_ = false;
      x_ = y_ = NaN;
    }

    // TODO rather than special-case polygons, simply handle them separately.
    // Ideally, coincident intersection points should be jittered to avoid
    // clipping issues.
    function lineEnd() {
      if (segments) {
        linePoint(x__, y__);
        if (v__ && v_) bufferStream.rejoin();
        segments.push(bufferStream.result());
      }
      clipStream.point = point;
      if (v_) activeStream.lineEnd();
    }

    function linePoint(x, y) {
      var v = visible(x, y);
      if (polygon) ring.push([x, y]);
      if (first) {
        x__ = x, y__ = y, v__ = v;
        first = false;
        if (v) {
          activeStream.lineStart();
          activeStream.point(x, y);
        }
      } else {
        if (v && v_) activeStream.point(x, y);
        else {
          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
          if (clipLine(a, b, x0, y0, x1, y1)) {
            if (!v_) {
              activeStream.lineStart();
              activeStream.point(a[0], a[1]);
            }
            activeStream.point(b[0], b[1]);
            if (!v) activeStream.lineEnd();
            clean = false;
          } else if (v) {
            activeStream.lineStart();
            activeStream.point(x, y);
            clean = false;
          }
        }
      }
      x_ = x, y_ = y, v_ = v;
    }

    return clipStream;
  };
}

var extent = function() {
  var x0 = 0,
      y0 = 0,
      x1 = 960,
      y1 = 500,
      cache,
      cacheStream,
      clip;

  return clip = {
    stream: function(stream) {
      return cache && cacheStream === stream ? cache : cache = clipExtent(x0, y0, x1, y1)(cacheStream = stream);
    },
    extent: function(_) {
      return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];
    }
  };
}

var lengthSum = adder();
var lambda0$2;
var sinPhi0$1;
var cosPhi0$1;

var lengthStream = {
  sphere: noop,
  point: noop,
  lineStart: lengthLineStart,
  lineEnd: noop,
  polygonStart: noop,
  polygonEnd: noop
};

function lengthLineStart() {
  lengthStream.point = lengthPointFirst;
  lengthStream.lineEnd = lengthLineEnd;
}

function lengthLineEnd() {
  lengthStream.point = lengthStream.lineEnd = noop;
}

function lengthPointFirst(lambda, phi) {
  lambda *= radians, phi *= radians;
  lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
  lengthStream.point = lengthPoint;
}

function lengthPoint(lambda, phi) {
  lambda *= radians, phi *= radians;
  var sinPhi = sin(phi),
      cosPhi = cos(phi),
      delta = abs(lambda - lambda0$2),
      cosDelta = cos(delta),
      sinDelta = sin(delta),
      x = cosPhi * sinDelta,
      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
  lengthSum.add(atan2(sqrt(x * x + y * y), z));
  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
}

var length = function(object) {
  lengthSum.reset();
  geoStream(object, lengthStream);
  return +lengthSum;
}

var coordinates = [null, null];
var object = {type: "LineString", coordinates: coordinates};

var distance = function(a, b) {
  coordinates[0] = a;
  coordinates[1] = b;
  return length(object);
}

function graticuleX(y0, y1, dy) {
  var y = d3Array.range(y0, y1 - epsilon, dy).concat(y1);
  return function(x) { return y.map(function(y) { return [x, y]; }); };
}

function graticuleY(x0, x1, dx) {
  var x = d3Array.range(x0, x1 - epsilon, dx).concat(x1);
  return function(y) { return x.map(function(x) { return [x, y]; }); };
}

var graticule = function() {
  var x1, x0, X1, X0,
      y1, y0, Y1, Y0,
      dx = 10, dy = dx, DX = 90, DY = 360,
      x, y, X, Y,
      precision = 2.5;

  function graticule() {
    return {type: "MultiLineString", coordinates: lines()};
  }

  function lines() {
    return d3Array.range(ceil(X0 / DX) * DX, X1, DX).map(X)
        .concat(d3Array.range(ceil(Y0 / DY) * DY, Y1, DY).map(Y))
        .concat(d3Array.range(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon; }).map(x))
        .concat(d3Array.range(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon; }).map(y));
  }

  graticule.lines = function() {
    return lines().map(function(coordinates) { return {type: "LineString", coordinates: coordinates}; });
  };

  graticule.outline = function() {
    return {
      type: "Polygon",
      coordinates: [
        X(X0).concat(
        Y(Y1).slice(1),
        X(X1).reverse().slice(1),
        Y(Y0).reverse().slice(1))
      ]
    };
  };

  graticule.extent = function(_) {
    if (!arguments.length) return graticule.extentMinor();
    return graticule.extentMajor(_).extentMinor(_);
  };

  graticule.extentMajor = function(_) {
    if (!arguments.length) return [[X0, Y0], [X1, Y1]];
    X0 = +_[0][0], X1 = +_[1][0];
    Y0 = +_[0][1], Y1 = +_[1][1];
    if (X0 > X1) _ = X0, X0 = X1, X1 = _;
    if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
    return graticule.precision(precision);
  };

  graticule.extentMinor = function(_) {
    if (!arguments.length) return [[x0, y0], [x1, y1]];
    x0 = +_[0][0], x1 = +_[1][0];
    y0 = +_[0][1], y1 = +_[1][1];
    if (x0 > x1) _ = x0, x0 = x1, x1 = _;
    if (y0 > y1) _ = y0, y0 = y1, y1 = _;
    return graticule.precision(precision);
  };

  graticule.step = function(_) {
    if (!arguments.length) return graticule.stepMinor();
    return graticule.stepMajor(_).stepMinor(_);
  };

  graticule.stepMajor = function(_) {
    if (!arguments.length) return [DX, DY];
    DX = +_[0], DY = +_[1];
    return graticule;
  };

  graticule.stepMinor = function(_) {
    if (!arguments.length) return [dx, dy];
    dx = +_[0], dy = +_[1];
    return graticule;
  };

  graticule.precision = function(_) {
    if (!arguments.length) return precision;
    precision = +_;
    x = graticuleX(y0, y1, 90);
    y = graticuleY(x0, x1, precision);
    X = graticuleX(Y0, Y1, 90);
    Y = graticuleY(X0, X1, precision);
    return graticule;
  };

  return graticule
      .extentMajor([[-180, -90 + epsilon], [180, 90 - epsilon]])
      .extentMinor([[-180, -80 - epsilon], [180, 80 + epsilon]]);
}

var interpolate = function(a, b) {
  var x0 = a[0] * radians,
      y0 = a[1] * radians,
      x1 = b[0] * radians,
      y1 = b[1] * radians,
      cy0 = cos(y0),
      sy0 = sin(y0),
      cy1 = cos(y1),
      sy1 = sin(y1),
      kx0 = cy0 * cos(x0),
      ky0 = cy0 * sin(x0),
      kx1 = cy1 * cos(x1),
      ky1 = cy1 * sin(x1),
      d = 2 * asin(sqrt(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),
      k = sin(d);

  var interpolate = d ? function(t) {
    var B = sin(t *= d) / k,
        A = sin(d - t) / k,
        x = A * kx0 + B * kx1,
        y = A * ky0 + B * ky1,
        z = A * sy0 + B * sy1;
    return [
      atan2(y, x) * degrees,
      atan2(z, sqrt(x * x + y * y)) * degrees
    ];
  } : function() {
    return [x0 * degrees, y0 * degrees];
  };

  interpolate.distance = d;

  return interpolate;
}

var identity = function(x) {
  return x;
}

var areaSum$1 = adder();
var areaRingSum$1 = adder();
var x00;
var y00;
var x0$1;
var y0$1;

var areaStream$1 = {
  point: noop,
  lineStart: noop,
  lineEnd: noop,
  polygonStart: function() {
    areaStream$1.lineStart = areaRingStart$1;
    areaStream$1.lineEnd = areaRingEnd$1;
  },
  polygonEnd: function() {
    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop;
    areaSum$1.add(abs(areaRingSum$1));
    areaRingSum$1.reset();
  },
  result: function() {
    var area = areaSum$1 / 2;
    areaSum$1.reset();
    return area;
  }
};

function areaRingStart$1() {
  areaStream$1.point = areaPointFirst$1;
}

function areaPointFirst$1(x, y) {
  areaStream$1.point = areaPoint$1;
  x00 = x0$1 = x, y00 = y0$1 = y;
}

function areaPoint$1(x, y) {
  areaRingSum$1.add(y0$1 * x - x0$1 * y);
  x0$1 = x, y0$1 = y;
}

function areaRingEnd$1() {
  areaPoint$1(x00, y00);
}

var x0$2 = Infinity;
var y0$2 = x0$2;
var x1 = -x0$2;
var y1 = x1;

var boundsStream$1 = {
  point: boundsPoint$1,
  lineStart: noop,
  lineEnd: noop,
  polygonStart: noop,
  polygonEnd: noop,
  result: function() {
    var bounds = [[x0$2, y0$2], [x1, y1]];
    x1 = y1 = -(y0$2 = x0$2 = Infinity);
    return bounds;
  }
};

function boundsPoint$1(x, y) {
  if (x < x0$2) x0$2 = x;
  if (x > x1) x1 = x;
  if (y < y0$2) y0$2 = y;
  if (y > y1) y1 = y;
}

// TODO Enforce positive area for exterior, negative area for interior?

var X0$1 = 0;
var Y0$1 = 0;
var Z0$1 = 0;
var X1$1 = 0;
var Y1$1 = 0;
var Z1$1 = 0;
var X2$1 = 0;
var Y2$1 = 0;
var Z2$1 = 0;
var x00$1;
var y00$1;
var x0$3;
var y0$3;

var centroidStream$1 = {
  point: centroidPoint$1,
  lineStart: centroidLineStart$1,
  lineEnd: centroidLineEnd$1,
  polygonStart: function() {
    centroidStream$1.lineStart = centroidRingStart$1;
    centroidStream$1.lineEnd = centroidRingEnd$1;
  },
  polygonEnd: function() {
    centroidStream$1.point = centroidPoint$1;
    centroidStream$1.lineStart = centroidLineStart$1;
    centroidStream$1.lineEnd = centroidLineEnd$1;
  },
  result: function() {
    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]
        : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]
        : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]
        : [NaN, NaN];
    X0$1 = Y0$1 = Z0$1 =
    X1$1 = Y1$1 = Z1$1 =
    X2$1 = Y2$1 = Z2$1 = 0;
    return centroid;
  }
};

function centroidPoint$1(x, y) {
  X0$1 += x;
  Y0$1 += y;
  ++Z0$1;
}

function centroidLineStart$1() {
  centroidStream$1.point = centroidPointFirstLine;
}

function centroidPointFirstLine(x, y) {
  centroidStream$1.point = centroidPointLine;
  centroidPoint$1(x0$3 = x, y0$3 = y);
}

function centroidPointLine(x, y) {
  var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);
  X1$1 += z * (x0$3 + x) / 2;
  Y1$1 += z * (y0$3 + y) / 2;
  Z1$1 += z;
  centroidPoint$1(x0$3 = x, y0$3 = y);
}

function centroidLineEnd$1() {
  centroidStream$1.point = centroidPoint$1;
}

function centroidRingStart$1() {
  centroidStream$1.point = centroidPointFirstRing;
}

function centroidRingEnd$1() {
  centroidPointRing(x00$1, y00$1);
}

function centroidPointFirstRing(x, y) {
  centroidStream$1.point = centroidPointRing;
  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
}

function centroidPointRing(x, y) {
  var dx = x - x0$3,
      dy = y - y0$3,
      z = sqrt(dx * dx + dy * dy);

  X1$1 += z * (x0$3 + x) / 2;
  Y1$1 += z * (y0$3 + y) / 2;
  Z1$1 += z;

  z = y0$3 * x - x0$3 * y;
  X2$1 += z * (x0$3 + x);
  Y2$1 += z * (y0$3 + y);
  Z2$1 += z * 3;
  centroidPoint$1(x0$3 = x, y0$3 = y);
}

function PathContext(context) {
  this._context = context;
}

PathContext.prototype = {
  _radius: 4.5,
  pointRadius: function(_) {
    return this._radius = _, this;
  },
  polygonStart: function() {
    this._line = 0;
  },
  polygonEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._point = 0;
  },
  lineEnd: function() {
    if (this._line === 0) this._context.closePath();
    this._point = NaN;
  },
  point: function(x, y) {
    switch (this._point) {
      case 0: {
        this._context.moveTo(x, y);
        this._point = 1;
        break;
      }
      case 1: {
        this._context.lineTo(x, y);
        break;
      }
      default: {
        this._context.moveTo(x + this._radius, y);
        this._context.arc(x, y, this._radius, 0, tau);
        break;
      }
    }
  },
  result: noop
};

function PathString() {
  this._string = [];
}

PathString.prototype = {
  _circle: circle$1(4.5),
  pointRadius: function(_) {
    return this._circle = circle$1(_), this;
  },
  polygonStart: function() {
    this._line = 0;
  },
  polygonEnd: function() {
    this._line = NaN;
  },
  lineStart: function() {
    this._point = 0;
  },
  lineEnd: function() {
    if (this._line === 0) this._string.push("Z");
    this._point = NaN;
  },
  point: function(x, y) {
    switch (this._point) {
      case 0: {
        this._string.push("M", x, ",", y);
        this._point = 1;
        break;
      }
      case 1: {
        this._string.push("L", x, ",", y);
        break;
      }
      default: {
        this._string.push("M", x, ",", y, this._circle);
        break;
      }
    }
  },
  result: function() {
    if (this._string.length) {
      var result = this._string.join("");
      this._string = [];
      return result;
    }
  }
};

function circle$1(radius) {
  return "m0," + radius
      + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
      + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
      + "z";
}

var index = function() {
  var pointRadius = 4.5,
      projection,
      projectionStream,
      context,
      contextStream;

  function path(object) {
    if (object) {
      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
      geoStream(object, projectionStream(contextStream));
    }
    return contextStream.result();
  }

  path.area = function(object) {
    geoStream(object, projectionStream(areaStream$1));
    return areaStream$1.result();
  };

  path.bounds = function(object) {
    geoStream(object, projectionStream(boundsStream$1));
    return boundsStream$1.result();
  };

  path.centroid = function(object) {
    geoStream(object, projectionStream(centroidStream$1));
    return centroidStream$1.result();
  };

  path.projection = function(_) {
    return arguments.length ? (projectionStream = (projection = _) == null ? identity : _.stream, path) : projection;
  };

  path.context = function(_) {
    if (!arguments.length) return context;
    contextStream = (context = _) == null ? new PathString : new PathContext(_);
    if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
    return path;
  };

  path.pointRadius = function(_) {
    if (!arguments.length) return pointRadius;
    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
    return path;
  };

  return path.projection(null).context(null);
}

var sum = adder();

var polygonContains = function(polygon, point) {
  var lambda = point[0],
      phi = point[1],
      normal = [sin(lambda), -cos(lambda), 0],
      angle = 0,
      winding = 0;

  sum.reset();

  for (var i = 0, n = polygon.length; i < n; ++i) {
    if (!(m = (ring = polygon[i]).length)) continue;
    var ring,
        m,
        point0 = ring[m - 1],
        lambda0 = point0[0],
        phi0 = point0[1] / 2 + quarterPi,
        sinPhi0 = sin(phi0),
        cosPhi0 = cos(phi0);

    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
      var point1 = ring[j],
          lambda1 = point1[0],
          phi1 = point1[1] / 2 + quarterPi,
          sinPhi1 = sin(phi1),
          cosPhi1 = cos(phi1),
          delta = lambda1 - lambda0,
          sign$$1 = delta >= 0 ? 1 : -1,
          absDelta = sign$$1 * delta,
          antimeridian = absDelta > pi,
          k = sinPhi0 * sinPhi1;

      sum.add(atan2(k * sign$$1 * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
      angle += antimeridian ? delta + sign$$1 * tau : delta;

      // Are the longitudes either side of the point’s meridian (lambda),
      // and are the latitudes smaller than the parallel (phi)?
      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
        var arc = cartesianCross(cartesian(point0), cartesian(point1));
        cartesianNormalizeInPlace(arc);
        var intersection = cartesianCross(normal, arc);
        cartesianNormalizeInPlace(intersection);
        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
          winding += antimeridian ^ delta >= 0 ? 1 : -1;
        }
      }
    }
  }

  // First, determine whether the South pole is inside or outside:
  //
  // It is inside if:
  // * the polygon winds around it in a clockwise direction.
  // * the polygon does not (cumulatively) wind around it, but has a negative
  //   (counter-clockwise) area.
  //
  // Second, count the (signed) number of times a segment crosses a lambda
  // from the point to the South pole.  If it is zero, then the point is the
  // same side as the South pole.

  return (angle < -epsilon || angle < epsilon && sum < -epsilon) ^ (winding & 1);
}

var clip = function(pointVisible, clipLine, interpolate, start) {
  return function(rotate, sink) {
    var line = clipLine(sink),
        rotatedStart = rotate.invert(start[0], start[1]),
        ringBuffer = clipBuffer(),
        ringSink = clipLine(ringBuffer),
        polygonStarted = false,
        polygon,
        segments,
        ring;

    var clip = {
      point: point,
      lineStart: lineStart,
      lineEnd: lineEnd,
      polygonStart: function() {
        clip.point = pointRing;
        clip.lineStart = ringStart;
        clip.lineEnd = ringEnd;
        segments = [];
        polygon = [];
      },
      polygonEnd: function() {
        clip.point = point;
        clip.lineStart = lineStart;
        clip.lineEnd = lineEnd;
        segments = d3Array.merge(segments);
        var startInside = polygonContains(polygon, rotatedStart);
        if (segments.length) {
          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
          clipPolygon(segments, compareIntersection, startInside, interpolate, sink);
        } else if (startInside) {
          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
          sink.lineStart();
          interpolate(null, null, 1, sink);
          sink.lineEnd();
        }
        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
        segments = polygon = null;
      },
      sphere: function() {
        sink.polygonStart();
        sink.lineStart();
        interpolate(null, null, 1, sink);
        sink.lineEnd();
        sink.polygonEnd();
      }
    };

    function point(lambda, phi) {
      var point = rotate(lambda, phi);
      if (pointVisible(lambda = point[0], phi = point[1])) sink.point(lambda, phi);
    }

    function pointLine(lambda, phi) {
      var point = rotate(lambda, phi);
      line.point(point[0], point[1]);
    }

    function lineStart() {
      clip.point = pointLine;
      line.lineStart();
    }

    function lineEnd() {
      clip.point = point;
      line.lineEnd();
    }

    function pointRing(lambda, phi) {
      ring.push([lambda, phi]);
      var point = rotate(lambda, phi);
      ringSink.point(point[0], point[1]);
    }

    function ringStart() {
      ringSink.lineStart();
      ring = [];
    }

    function ringEnd() {
      pointRing(ring[0][0], ring[0][1]);
      ringSink.lineEnd();

      var clean = ringSink.clean(),
          ringSegments = ringBuffer.result(),
          i, n = ringSegments.length, m,
          segment,
          point;

      ring.pop();
      polygon.push(ring);
      ring = null;

      if (!n) return;

      // No intersections.
      if (clean & 1) {
        segment = ringSegments[0];
        if ((m = segment.length - 1) > 0) {
          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
          sink.lineStart();
          for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);
          sink.lineEnd();
        }
        return;
      }

      // Rejoin connected segments.
      // TODO reuse ringBuffer.rejoin()?
      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));

      segments.push(ringSegments.filter(validSegment));
    }

    return clip;
  };
}

function validSegment(segment) {
  return segment.length > 1;
}

// Intersections are sorted along the clip edge. For both antimeridian cutting
// and circle clipping, the same comparison is used.
function compareIntersection(a, b) {
  return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon : halfPi - a[1])
       - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon : halfPi - b[1]);
}

var clipAntimeridian = clip(
  function() { return true; },
  clipAntimeridianLine,
  clipAntimeridianInterpolate,
  [-pi, -halfPi]
);

// Takes a line and cuts into visible segments. Return values: 0 - there were
// intersections or the line was empty; 1 - no intersections; 2 - there were
// intersections, and the first and last segments should be rejoined.
function clipAntimeridianLine(stream) {
  var lambda0 = NaN,
      phi0 = NaN,
      sign0 = NaN,
      clean; // no intersections

  return {
    lineStart: function() {
      stream.lineStart();
      clean = 1;
    },
    point: function(lambda1, phi1) {
      var sign1 = lambda1 > 0 ? pi : -pi,
          delta = abs(lambda1 - lambda0);
      if (abs(delta - pi) < epsilon) { // line crosses a pole
        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
        stream.point(sign0, phi0);
        stream.lineEnd();
        stream.lineStart();
        stream.point(sign1, phi0);
        stream.point(lambda1, phi0);
        clean = 0;
      } else if (sign0 !== sign1 && delta >= pi) { // line crosses antimeridian
        if (abs(lambda0 - sign0) < epsilon) lambda0 -= sign0 * epsilon; // handle degeneracies
        if (abs(lambda1 - sign1) < epsilon) lambda1 -= sign1 * epsilon;
        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
        stream.point(sign0, phi0);
        stream.lineEnd();
        stream.lineStart();
        stream.point(sign1, phi0);
        clean = 0;
      }
      stream.point(lambda0 = lambda1, phi0 = phi1);
      sign0 = sign1;
    },
    lineEnd: function() {
      stream.lineEnd();
      lambda0 = phi0 = NaN;
    },
    clean: function() {
      return 2 - clean; // if intersections, rejoin first and last segments
    }
  };
}

function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
  var cosPhi0,
      cosPhi1,
      sinLambda0Lambda1 = sin(lambda0 - lambda1);
  return abs(sinLambda0Lambda1) > epsilon
      ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1)
          - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0))
          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
      : (phi0 + phi1) / 2;
}

function clipAntimeridianInterpolate(from, to, direction, stream) {
  var phi;
  if (from == null) {
    phi = direction * halfPi;
    stream.point(-pi, phi);
    stream.point(0, phi);
    stream.point(pi, phi);
    stream.point(pi, 0);
    stream.point(pi, -phi);
    stream.point(0, -phi);
    stream.point(-pi, -phi);
    stream.point(-pi, 0);
    stream.point(-pi, phi);
  } else if (abs(from[0] - to[0]) > epsilon) {
    var lambda = from[0] < to[0] ? pi : -pi;
    phi = direction * lambda / 2;
    stream.point(-lambda, phi);
    stream.point(0, phi);
    stream.point(lambda, phi);
  } else {
    stream.point(to[0], to[1]);
  }
}

var clipCircle = function(radius, delta) {
  var cr = cos(radius),
      smallRadius = cr > 0,
      notHemisphere = abs(cr) > epsilon; // TODO optimise for this common case

  function interpolate(from, to, direction, stream) {
    circleStream(stream, radius, delta, direction, from, to);
  }

  function visible(lambda, phi) {
    return cos(lambda) * cos(phi) > cr;
  }

  // Takes a line and cuts into visible segments. Return values used for polygon
  // clipping: 0 - there were intersections or the line was empty; 1 - no
  // intersections 2 - there were intersections, and the first and last segments
  // should be rejoined.
  function clipLine(stream) {
    var point0, // previous point
        c0, // code for previous point
        v0, // visibility of previous point
        v00, // visibility of first point
        clean; // no intersections
    return {
      lineStart: function() {
        v00 = v0 = false;
        clean = 1;
      },
      point: function(lambda, phi) {
        var point1 = [lambda, phi],
            point2,
            v = visible(lambda, phi),
            c = smallRadius
              ? v ? 0 : code(lambda, phi)
              : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
        if (!point0 && (v00 = v0 = v)) stream.lineStart();
        // Handle degeneracies.
        // TODO ignore if not clipping polygons.
        if (v !== v0) {
          point2 = intersect(point0, point1);
          if (pointEqual(point0, point2) || pointEqual(point1, point2)) {
            point1[0] += epsilon;
            point1[1] += epsilon;
            v = visible(point1[0], point1[1]);
          }
        }
        if (v !== v0) {
          clean = 0;
          if (v) {
            // outside going in
            stream.lineStart();
            point2 = intersect(point1, point0);
            stream.point(point2[0], point2[1]);
          } else {
            // inside going out
            point2 = intersect(point0, point1);
            stream.point(point2[0], point2[1]);
            stream.lineEnd();
          }
          point0 = point2;
        } else if (notHemisphere && point0 && smallRadius ^ v) {
          var t;
          // If the codes for two points are different, or are both zero,
          // and there this segment intersects with the small circle.
          if (!(c & c0) && (t = intersect(point1, point0, true))) {
            clean = 0;
            if (smallRadius) {
              stream.lineStart();
              stream.point(t[0][0], t[0][1]);
              stream.point(t[1][0], t[1][1]);
              stream.lineEnd();
            } else {
              stream.point(t[1][0], t[1][1]);
              stream.lineEnd();
              stream.lineStart();
              stream.point(t[0][0], t[0][1]);
            }
          }
        }
        if (v && (!point0 || !pointEqual(point0, point1))) {
          stream.point(point1[0], point1[1]);
        }
        point0 = point1, v0 = v, c0 = c;
      },
      lineEnd: function() {
        if (v0) stream.lineEnd();
        point0 = null;
      },
      // Rejoin first and last segments if there were intersections and the first
      // and last points were visible.
      clean: function() {
        return clean | ((v00 && v0) << 1);
      }
    };
  }

  // Intersects the great circle between a and b with the clip circle.
  function intersect(a, b, two) {
    var pa = cartesian(a),
        pb = cartesian(b);

    // We have two planes, n1.p = d1 and n2.p = d2.
    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
    var n1 = [1, 0, 0], // normal
        n2 = cartesianCross(pa, pb),
        n2n2 = cartesianDot(n2, n2),
        n1n2 = n2[0], // cartesianDot(n1, n2),
        determinant = n2n2 - n1n2 * n1n2;

    // Two polar points.
    if (!determinant) return !two && a;

    var c1 =  cr * n2n2 / determinant,
        c2 = -cr * n1n2 / determinant,
        n1xn2 = cartesianCross(n1, n2),
        A = cartesianScale(n1, c1),
        B = cartesianScale(n2, c2);
    cartesianAddInPlace(A, B);

    // Solve |p(t)|^2 = 1.
    var u = n1xn2,
        w = cartesianDot(A, u),
        uu = cartesianDot(u, u),
        t2 = w * w - uu * (cartesianDot(A, A) - 1);

    if (t2 < 0) return;

    var t = sqrt(t2),
        q = cartesianScale(u, (-w - t) / uu);
    cartesianAddInPlace(q, A);
    q = spherical(q);

    if (!two) return q;

    // Two intersection points.
    var lambda0 = a[0],
        lambda1 = b[0],
        phi0 = a[1],
        phi1 = b[1],
        z;

    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;

    var delta = lambda1 - lambda0,
        polar = abs(delta - pi) < epsilon,
        meridian = polar || delta < epsilon;

    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;

    // Check that the first point is between a and b.
    if (meridian
        ? polar
          ? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon ? phi0 : phi1)
          : phi0 <= q[1] && q[1] <= phi1
        : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
      var q1 = cartesianScale(u, (-w + t) / uu);
      cartesianAddInPlace(q1, A);
      return [q, spherical(q1)];
    }
  }

  // Generates a 4-bit vector representing the location of a point relative to
  // the small circle's bounding box.
  function code(lambda, phi) {
    var r = smallRadius ? radius : pi - radius,
        code = 0;
    if (lambda < -r) code |= 1; // left
    else if (lambda > r) code |= 2; // right
    if (phi < -r) code |= 4; // below
    else if (phi > r) code |= 8; // above
    return code;
  }

  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
}

var transform = function(prototype) {
  return {
    stream: transform$1(prototype)
  };
}

function transform$1(prototype) {
  function T() {}
  var p = T.prototype = Object.create(Transform.prototype);
  for (var k in prototype) p[k] = prototype[k];
  return function(stream) {
    var t = new T;
    t.stream = stream;
    return t;
  };
}

function Transform() {}

Transform.prototype = {
  point: function(x, y) { this.stream.point(x, y); },
  sphere: function() { this.stream.sphere(); },
  lineStart: function() { this.stream.lineStart(); },
  lineEnd: function() { this.stream.lineEnd(); },
  polygonStart: function() { this.stream.polygonStart(); },
  polygonEnd: function() { this.stream.polygonEnd(); }
};

function fit(project, extent, object) {
  var w = extent[1][0] - extent[0][0],
      h = extent[1][1] - extent[0][1],
      clip = project.clipExtent && project.clipExtent();

  project
      .scale(150)
      .translate([0, 0]);

  if (clip != null) project.clipExtent(null);

  geoStream(object, project.stream(boundsStream$1));

  var b = boundsStream$1.result(),
      k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
      x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
      y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;

  if (clip != null) project.clipExtent(clip);

  return project
      .scale(k * 150)
      .translate([x, y]);
}

function fitSize(project) {
  return function(size, object) {
    return fit(project, [[0, 0], size], object);
  };
}

function fitExtent(project) {
  return function(extent, object) {
    return fit(project, extent, object);
  };
}

var maxDepth = 16;
var cosMinDistance = cos(30 * radians); // cos(minimum angular distance)

var resample = function(project, delta2) {
  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
}

function resampleNone(project) {
  return transform$1({
    point: function(x, y) {
      x = project(x, y);
      this.stream.point(x[0], x[1]);
    }
  });
}

function resample$1(project, delta2) {

  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
    var dx = x1 - x0,
        dy = y1 - y0,
        d2 = dx * dx + dy * dy;
    if (d2 > 4 * delta2 && depth--) {
      var a = a0 + a1,
          b = b0 + b1,
          c = c0 + c1,
          m = sqrt(a * a + b * b + c * c),
          phi2 = asin(c /= m),
          lambda2 = abs(abs(c) - 1) < epsilon || abs(lambda0 - lambda1) < epsilon ? (lambda0 + lambda1) / 2 : atan2(b, a),
          p = project(lambda2, phi2),
          x2 = p[0],
          y2 = p[1],
          dx2 = x2 - x0,
          dy2 = y2 - y0,
          dz = dy * dx2 - dx * dy2;
      if (dz * dz / d2 > delta2 // perpendicular projected distance
          || abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
          || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
        stream.point(x2, y2);
        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
      }
    }
  }
  return function(stream) {
    var lambda00, x00, y00, a00, b00, c00, // first point
        lambda0, x0, y0, a0, b0, c0; // previous point

    var resampleStream = {
      point: point,
      lineStart: lineStart,
      lineEnd: lineEnd,
      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
    };

    function point(x, y) {
      x = project(x, y);
      stream.point(x[0], x[1]);
    }

    function lineStart() {
      x0 = NaN;
      resampleStream.point = linePoint;
      stream.lineStart();
    }

    function linePoint(lambda, phi) {
      var c = cartesian([lambda, phi]), p = project(lambda, phi);
      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
      stream.point(x0, y0);
    }

    function lineEnd() {
      resampleStream.point = point;
      stream.lineEnd();
    }

    function ringStart() {
      lineStart();
      resampleStream.point = ringPoint;
      resampleStream.lineEnd = ringEnd;
    }

    function ringPoint(lambda, phi) {
      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
      resampleStream.point = linePoint;
    }

    function ringEnd() {
      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
      resampleStream.lineEnd = lineEnd;
      lineEnd();
    }

    return resampleStream;
  };
}

var transformRadians = transform$1({
  point: function(x, y) {
    this.stream.point(x * radians, y * radians);
  }
});

function projection(project) {
  return projectionMutator(function() { return project; })();
}

function projectionMutator(projectAt) {
  var project,
      k = 150, // scale
      x = 480, y = 250, // translate
      dx, dy, lambda = 0, phi = 0, // center
      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, projectRotate, // rotate
      theta = null, preclip = clipAntimeridian, // clip angle
      x0 = null, y0, x1, y1, postclip = identity, // clip extent
      delta2 = 0.5, projectResample = resample(projectTransform, delta2), // precision
      cache,
      cacheStream;

  function projection(point) {
    point = projectRotate(point[0] * radians, point[1] * radians);
    return [point[0] * k + dx, dy - point[1] * k];
  }

  function invert(point) {
    point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k);
    return point && [point[0] * degrees, point[1] * degrees];
  }

  function projectTransform(x, y) {
    return x = project(x, y), [x[0] * k + dx, dy - x[1] * k];
  }

  projection.stream = function(stream) {
    return cache && cacheStream === stream ? cache : cache = transformRadians(preclip(rotate, projectResample(postclip(cacheStream = stream))));
  };

  projection.clipAngle = function(_) {
    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians, 6 * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
  };

  projection.clipExtent = function(_) {
    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
  };

  projection.scale = function(_) {
    return arguments.length ? (k = +_, recenter()) : k;
  };

  projection.translate = function(_) {
    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
  };

  projection.center = function(_) {
    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
  };

  projection.rotate = function(_) {
    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
  };

  projection.precision = function(_) {
    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
  };

  projection.fitExtent = fitExtent(projection);

  projection.fitSize = fitSize(projection);

  function recenter() {
    projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project);
    var center = project(lambda, phi);
    dx = x - center[0] * k;
    dy = y + center[1] * k;
    return reset();
  }

  function reset() {
    cache = cacheStream = null;
    return projection;
  }

  return function() {
    project = projectAt.apply(this, arguments);
    projection.invert = project.invert && invert;
    return recenter();
  };
}

function conicProjection(projectAt) {
  var phi0 = 0,
      phi1 = pi / 3,
      m = projectionMutator(projectAt),
      p = m(phi0, phi1);

  p.parallels = function(_) {
    return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees, phi1 * degrees];
  };

  return p;
}

function conicEqualAreaRaw(y0, y1) {
  var sy0 = sin(y0),
      n = (sy0 + sin(y1)) / 2,
      c = 1 + sy0 * (2 * n - sy0),
      r0 = sqrt(c) / n;

  function project(x, y) {
    var r = sqrt(c - 2 * n * sin(y)) / n;
    return [r * sin(x *= n), r0 - r * cos(x)];
  }

  project.invert = function(x, y) {
    var r0y = r0 - y;
    return [atan2(x, r0y) / n, asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
  };

  return project;
}

var conicEqualArea = function() {
  return conicProjection(conicEqualAreaRaw)
      .scale(155.424)
      .center([0, 33.6442]);
}

var albers = function() {
  return conicEqualArea()
      .parallels([29.5, 45.5])
      .scale(1070)
      .translate([480, 250])
      .rotate([96, 0])
      .center([-0.6, 38.7]);
}

// The projections must have mutually exclusive clip regions on the sphere,
// as this will avoid emitting interleaving lines and polygons.
function multiplex(streams) {
  var n = streams.length;
  return {
    point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
    sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
    lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
    lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
    polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
    polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
  };
}

// A composite projection for the United States, configured by default for
// 960×500. The projection also works quite well at 960×600 if you change the
// scale to 1285 and adjust the translate accordingly. The set of standard
// parallels for each region comes from USGS, which is published here:
// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
var albersUsa = function() {
  var cache,
      cacheStream,
      lower48 = albers(), lower48Point,
      alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338
      hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007
      point, pointStream = {point: function(x, y) { point = [x, y]; }};

  function albersUsa(coordinates) {
    var x = coordinates[0], y = coordinates[1];
    return point = null,
        (lower48Point.point(x, y), point)
        || (alaskaPoint.point(x, y), point)
        || (hawaiiPoint.point(x, y), point);
  }

  albersUsa.invert = function(coordinates) {
    var k = lower48.scale(),
        t = lower48.translate(),
        x = (coordinates[0] - t[0]) / k,
        y = (coordinates[1] - t[1]) / k;
    return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska
        : y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii
        : lower48).invert(coordinates);
  };

  albersUsa.stream = function(stream) {
    return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
  };

  albersUsa.precision = function(_) {
    if (!arguments.length) return lower48.precision();
    lower48.precision(_), alaska.precision(_), hawaii.precision(_);
    return reset();
  };

  albersUsa.scale = function(_) {
    if (!arguments.length) return lower48.scale();
    lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
    return albersUsa.translate(lower48.translate());
  };

  albersUsa.translate = function(_) {
    if (!arguments.length) return lower48.translate();
    var k = lower48.scale(), x = +_[0], y = +_[1];

    lower48Point = lower48
        .translate(_)
        .clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])
        .stream(pointStream);

    alaskaPoint = alaska
        .translate([x - 0.307 * k, y + 0.201 * k])
        .clipExtent([[x - 0.425 * k + epsilon, y + 0.120 * k + epsilon], [x - 0.214 * k - epsilon, y + 0.234 * k - epsilon]])
        .stream(pointStream);

    hawaiiPoint = hawaii
        .translate([x - 0.205 * k, y + 0.212 * k])
        .clipExtent([[x - 0.214 * k + epsilon, y + 0.166 * k + epsilon], [x - 0.115 * k - epsilon, y + 0.234 * k - epsilon]])
        .stream(pointStream);

    return reset();
  };

  albersUsa.fitExtent = fitExtent(albersUsa);

  albersUsa.fitSize = fitSize(albersUsa);

  function reset() {
    cache = cacheStream = null;
    return albersUsa;
  }

  return albersUsa.scale(1070);
}

function azimuthalRaw(scale) {
  return function(x, y) {
    var cx = cos(x),
        cy = cos(y),
        k = scale(cx * cy);
    return [
      k * cy * sin(x),
      k * sin(y)
    ];
  }
}

function azimuthalInvert(angle) {
  return function(x, y) {
    var z = sqrt(x * x + y * y),
        c = angle(z),
        sc = sin(c),
        cc = cos(c);
    return [
      atan2(x * sc, z * cc),
      asin(z && y * sc / z)
    ];
  }
}

var azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {
  return sqrt(2 / (1 + cxcy));
});

azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {
  return 2 * asin(z / 2);
});

var azimuthalEqualArea = function() {
  return projection(azimuthalEqualAreaRaw)
      .scale(124.75)
      .clipAngle(180 - 1e-3);
}

var azimuthalEquidistantRaw = azimuthalRaw(function(c) {
  return (c = acos(c)) && c / sin(c);
});

azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {
  return z;
});

var azimuthalEquidistant = function() {
  return projection(azimuthalEquidistantRaw)
      .scale(79.4188)
      .clipAngle(180 - 1e-3);
}

function mercatorRaw(lambda, phi) {
  return [lambda, log(tan((halfPi + phi) / 2))];
}

mercatorRaw.invert = function(x, y) {
  return [x, 2 * atan(exp(y)) - halfPi];
};

var mercator = function() {
  return mercatorProjection(mercatorRaw)
      .scale(961 / tau);
}

function mercatorProjection(project) {
  var m = projection(project),
      scale = m.scale,
      translate = m.translate,
      clipExtent = m.clipExtent,
      clipAuto;

  m.scale = function(_) {
    return arguments.length ? (scale(_), clipAuto && m.clipExtent(null), m) : scale();
  };

  m.translate = function(_) {
    return arguments.length ? (translate(_), clipAuto && m.clipExtent(null), m) : translate();
  };

  m.clipExtent = function(_) {
    if (!arguments.length) return clipAuto ? null : clipExtent();
    if (clipAuto = _ == null) {
      var k = pi * scale(),
          t = translate();
      _ = [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]];
    }
    clipExtent(_);
    return m;
  };

  return m.clipExtent(null);
}

function tany(y) {
  return tan((halfPi + y) / 2);
}

function conicConformalRaw(y0, y1) {
  var cy0 = cos(y0),
      n = y0 === y1 ? sin(y0) : log(cy0 / cos(y1)) / log(tany(y1) / tany(y0)),
      f = cy0 * pow(tany(y0), n) / n;

  if (!n) return mercatorRaw;

  function project(x, y) {
    if (f > 0) { if (y < -halfPi + epsilon) y = -halfPi + epsilon; }
    else { if (y > halfPi - epsilon) y = halfPi - epsilon; }
    var r = f / pow(tany(y), n);
    return [r * sin(n * x), f - r * cos(n * x)];
  }

  project.invert = function(x, y) {
    var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy);
    return [atan2(x, fy) / n, 2 * atan(pow(f / r, 1 / n)) - halfPi];
  };

  return project;
}

var conicConformal = function() {
  return conicProjection(conicConformalRaw)
      .scale(109.5)
      .parallels([30, 30]);
}

function equirectangularRaw(lambda, phi) {
  return [lambda, phi];
}

equirectangularRaw.invert = equirectangularRaw;

var equirectangular = function() {
  return projection(equirectangularRaw)
      .scale(152.63);
}

function conicEquidistantRaw(y0, y1) {
  var cy0 = cos(y0),
      n = y0 === y1 ? sin(y0) : (cy0 - cos(y1)) / (y1 - y0),
      g = cy0 / n + y0;

  if (abs(n) < epsilon) return equirectangularRaw;

  function project(x, y) {
    var gy = g - y, nx = n * x;
    return [gy * sin(nx), g - gy * cos(nx)];
  }

  project.invert = function(x, y) {
    var gy = g - y;
    return [atan2(x, gy) / n, g - sign(n) * sqrt(x * x + gy * gy)];
  };

  return project;
}

var conicEquidistant = function() {
  return conicProjection(conicEquidistantRaw)
      .scale(131.154)
      .center([0, 13.9389]);
}

function gnomonicRaw(x, y) {
  var cy = cos(y), k = cos(x) * cy;
  return [cy * sin(x) / k, sin(y) / k];
}

gnomonicRaw.invert = azimuthalInvert(atan);

var gnomonic = function() {
  return projection(gnomonicRaw)
      .scale(144.049)
      .clipAngle(60);
}

function orthographicRaw(x, y) {
  return [cos(y) * sin(x), sin(y)];
}

orthographicRaw.invert = azimuthalInvert(asin);

var orthographic = function() {
  return projection(orthographicRaw)
      .scale(249.5)
      .clipAngle(90 + epsilon);
}

function stereographicRaw(x, y) {
  var cy = cos(y), k = 1 + cos(x) * cy;
  return [cy * sin(x) / k, sin(y) / k];
}

stereographicRaw.invert = azimuthalInvert(function(z) {
  return 2 * atan(z);
});

var stereographic = function() {
  return projection(stereographicRaw)
      .scale(250)
      .clipAngle(142);
}

function transverseMercatorRaw(lambda, phi) {
  return [log(tan((halfPi + phi) / 2)), -lambda];
}

transverseMercatorRaw.invert = function(x, y) {
  return [-y, 2 * atan(exp(x)) - halfPi];
};

var transverseMercator = function() {
  var m = mercatorProjection(transverseMercatorRaw),
      center = m.center,
      rotate = m.rotate;

  m.center = function(_) {
    return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);
  };

  m.rotate = function(_) {
    return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);
  };

  return rotate([0, 0, 90])
      .scale(159.155);
}

exports.geoArea = area;
exports.geoBounds = bounds;
exports.geoCentroid = centroid;
exports.geoCircle = circle;
exports.geoClipExtent = extent;
exports.geoDistance = distance;
exports.geoGraticule = graticule;
exports.geoInterpolate = interpolate;
exports.geoLength = length;
exports.geoPath = index;
exports.geoAlbers = albers;
exports.geoAlbersUsa = albersUsa;
exports.geoAzimuthalEqualArea = azimuthalEqualArea;
exports.geoAzimuthalEqualAreaRaw = azimuthalEqualAreaRaw;
exports.geoAzimuthalEquidistant = azimuthalEquidistant;
exports.geoAzimuthalEquidistantRaw = azimuthalEquidistantRaw;
exports.geoConicConformal = conicConformal;
exports.geoConicConformalRaw = conicConformalRaw;
exports.geoConicEqualArea = conicEqualArea;
exports.geoConicEqualAreaRaw = conicEqualAreaRaw;
exports.geoConicEquidistant = conicEquidistant;
exports.geoConicEquidistantRaw = conicEquidistantRaw;
exports.geoEquirectangular = equirectangular;
exports.geoEquirectangularRaw = equirectangularRaw;
exports.geoGnomonic = gnomonic;
exports.geoGnomonicRaw = gnomonicRaw;
exports.geoProjection = projection;
exports.geoProjectionMutator = projectionMutator;
exports.geoMercator = mercator;
exports.geoMercatorRaw = mercatorRaw;
exports.geoOrthographic = orthographic;
exports.geoOrthographicRaw = orthographicRaw;
exports.geoStereographic = stereographic;
exports.geoStereographicRaw = stereographicRaw;
exports.geoTransverseMercator = transverseMercator;
exports.geoTransverseMercatorRaw = transverseMercatorRaw;
exports.geoRotation = rotation;
exports.geoStream = geoStream;
exports.geoTransform = transform;

Object.defineProperty(exports, '__esModule', { value: true });

})));

},{"d3-array":2}],11:[function(require,module,exports){
// https://d3js.org/d3-interpolate/ Version 1.1.1. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-color')) :
  typeof define === 'function' && define.amd ? define(['exports', 'd3-color'], factory) :
  (factory((global.d3 = global.d3 || {}),global.d3));
}(this, function (exports,d3Color) { 'use strict';

  function basis(t1, v0, v1, v2, v3) {
    var t2 = t1 * t1, t3 = t2 * t1;
    return ((1 - 3 * t1 + 3 * t2 - t3) * v0
        + (4 - 6 * t2 + 3 * t3) * v1
        + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2
        + t3 * v3) / 6;
  }

  function basis$1(values) {
    var n = values.length - 1;
    return function(t) {
      var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
          v1 = values[i],
          v2 = values[i + 1],
          v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
          v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
      return basis((t - i / n) * n, v0, v1, v2, v3);
    };
  }

  function basisClosed(values) {
    var n = values.length;
    return function(t) {
      var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
          v0 = values[(i + n - 1) % n],
          v1 = values[i % n],
          v2 = values[(i + 1) % n],
          v3 = values[(i + 2) % n];
      return basis((t - i / n) * n, v0, v1, v2, v3);
    };
  }

  function constant(x) {
    return function() {
      return x;
    };
  }

  function linear(a, d) {
    return function(t) {
      return a + t * d;
    };
  }

  function exponential(a, b, y) {
    return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
      return Math.pow(a + t * b, y);
    };
  }

  function hue(a, b) {
    var d = b - a;
    return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant(isNaN(a) ? b : a);
  }

  function gamma(y) {
    return (y = +y) === 1 ? nogamma : function(a, b) {
      return b - a ? exponential(a, b, y) : constant(isNaN(a) ? b : a);
    };
  }

  function nogamma(a, b) {
    var d = b - a;
    return d ? linear(a, d) : constant(isNaN(a) ? b : a);
  }

  var rgb$1 = (function rgbGamma(y) {
    var color = gamma(y);

    function rgb(start, end) {
      var r = color((start = d3Color.rgb(start)).r, (end = d3Color.rgb(end)).r),
          g = color(start.g, end.g),
          b = color(start.b, end.b),
          opacity = color(start.opacity, end.opacity);
      return function(t) {
        start.r = r(t);
        start.g = g(t);
        start.b = b(t);
        start.opacity = opacity(t);
        return start + "";
      };
    }

    rgb.gamma = rgbGamma;

    return rgb;
  })(1);

  function rgbSpline(spline) {
    return function(colors) {
      var n = colors.length,
          r = new Array(n),
          g = new Array(n),
          b = new Array(n),
          i, color;
      for (i = 0; i < n; ++i) {
        color = d3Color.rgb(colors[i]);
        r[i] = color.r || 0;
        g[i] = color.g || 0;
        b[i] = color.b || 0;
      }
      r = spline(r);
      g = spline(g);
      b = spline(b);
      color.opacity = 1;
      return function(t) {
        color.r = r(t);
        color.g = g(t);
        color.b = b(t);
        return color + "";
      };
    };
  }

  var rgbBasis = rgbSpline(basis$1);
  var rgbBasisClosed = rgbSpline(basisClosed);

  function array(a, b) {
    var nb = b ? b.length : 0,
        na = a ? Math.min(nb, a.length) : 0,
        x = new Array(nb),
        c = new Array(nb),
        i;

    for (i = 0; i < na; ++i) x[i] = value(a[i], b[i]);
    for (; i < nb; ++i) c[i] = b[i];

    return function(t) {
      for (i = 0; i < na; ++i) c[i] = x[i](t);
      return c;
    };
  }

  function date(a, b) {
    var d = new Date;
    return a = +a, b -= a, function(t) {
      return d.setTime(a + b * t), d;
    };
  }

  function number(a, b) {
    return a = +a, b -= a, function(t) {
      return a + b * t;
    };
  }

  function object(a, b) {
    var i = {},
        c = {},
        k;

    if (a === null || typeof a !== "object") a = {};
    if (b === null || typeof b !== "object") b = {};

    for (k in b) {
      if (k in a) {
        i[k] = value(a[k], b[k]);
      } else {
        c[k] = b[k];
      }
    }

    return function(t) {
      for (k in i) c[k] = i[k](t);
      return c;
    };
  }

  var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;
  var reB = new RegExp(reA.source, "g");
  function zero(b) {
    return function() {
      return b;
    };
  }

  function one(b) {
    return function(t) {
      return b(t) + "";
    };
  }

  function string(a, b) {
    var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
        am, // current match in a
        bm, // current match in b
        bs, // string preceding current number in b, if any
        i = -1, // index in s
        s = [], // string constants and placeholders
        q = []; // number interpolators

    // Coerce inputs to strings.
    a = a + "", b = b + "";

    // Interpolate pairs of numbers in a & b.
    while ((am = reA.exec(a))
        && (bm = reB.exec(b))) {
      if ((bs = bm.index) > bi) { // a string precedes the next number in b
        bs = b.slice(bi, bs);
        if (s[i]) s[i] += bs; // coalesce with previous string
        else s[++i] = bs;
      }
      if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
        if (s[i]) s[i] += bm; // coalesce with previous string
        else s[++i] = bm;
      } else { // interpolate non-matching numbers
        s[++i] = null;
        q.push({i: i, x: number(am, bm)});
      }
      bi = reB.lastIndex;
    }

    // Add remains of b.
    if (bi < b.length) {
      bs = b.slice(bi);
      if (s[i]) s[i] += bs; // coalesce with previous string
      else s[++i] = bs;
    }

    // Special optimization for only a single match.
    // Otherwise, interpolate each of the numbers and rejoin the string.
    return s.length < 2 ? (q[0]
        ? one(q[0].x)
        : zero(b))
        : (b = q.length, function(t) {
            for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
            return s.join("");
          });
  }

  function value(a, b) {
    var t = typeof b, c;
    return b == null || t === "boolean" ? constant(b)
        : (t === "number" ? number
        : t === "string" ? ((c = d3Color.color(b)) ? (b = c, rgb$1) : string)
        : b instanceof d3Color.color ? rgb$1
        : b instanceof Date ? date
        : Array.isArray(b) ? array
        : isNaN(b) ? object
        : number)(a, b);
  }

  function round(a, b) {
    return a = +a, b -= a, function(t) {
      return Math.round(a + b * t);
    };
  }

  var degrees = 180 / Math.PI;

  var identity = {
    translateX: 0,
    translateY: 0,
    rotate: 0,
    skewX: 0,
    scaleX: 1,
    scaleY: 1
  };

  function decompose(a, b, c, d, e, f) {
    var scaleX, scaleY, skewX;
    if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
    if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
    if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
    if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
    return {
      translateX: e,
      translateY: f,
      rotate: Math.atan2(b, a) * degrees,
      skewX: Math.atan(skewX) * degrees,
      scaleX: scaleX,
      scaleY: scaleY
    };
  }

  var cssNode;
  var cssRoot;
  var cssView;
  var svgNode;
  function parseCss(value) {
    if (value === "none") return identity;
    if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
    cssNode.style.transform = value;
    value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
    cssRoot.removeChild(cssNode);
    value = value.slice(7, -1).split(",");
    return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
  }

  function parseSvg(value) {
    if (value == null) return identity;
    if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
    svgNode.setAttribute("transform", value);
    if (!(value = svgNode.transform.baseVal.consolidate())) return identity;
    value = value.matrix;
    return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
  }

  function interpolateTransform(parse, pxComma, pxParen, degParen) {

    function pop(s) {
      return s.length ? s.pop() + " " : "";
    }

    function translate(xa, ya, xb, yb, s, q) {
      if (xa !== xb || ya !== yb) {
        var i = s.push("translate(", null, pxComma, null, pxParen);
        q.push({i: i - 4, x: number(xa, xb)}, {i: i - 2, x: number(ya, yb)});
      } else if (xb || yb) {
        s.push("translate(" + xb + pxComma + yb + pxParen);
      }
    }

    function rotate(a, b, s, q) {
      if (a !== b) {
        if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
        q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: number(a, b)});
      } else if (b) {
        s.push(pop(s) + "rotate(" + b + degParen);
      }
    }

    function skewX(a, b, s, q) {
      if (a !== b) {
        q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: number(a, b)});
      } else if (b) {
        s.push(pop(s) + "skewX(" + b + degParen);
      }
    }

    function scale(xa, ya, xb, yb, s, q) {
      if (xa !== xb || ya !== yb) {
        var i = s.push(pop(s) + "scale(", null, ",", null, ")");
        q.push({i: i - 4, x: number(xa, xb)}, {i: i - 2, x: number(ya, yb)});
      } else if (xb !== 1 || yb !== 1) {
        s.push(pop(s) + "scale(" + xb + "," + yb + ")");
      }
    }

    return function(a, b) {
      var s = [], // string constants and placeholders
          q = []; // number interpolators
      a = parse(a), b = parse(b);
      translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
      rotate(a.rotate, b.rotate, s, q);
      skewX(a.skewX, b.skewX, s, q);
      scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
      a = b = null; // gc
      return function(t) {
        var i = -1, n = q.length, o;
        while (++i < n) s[(o = q[i]).i] = o.x(t);
        return s.join("");
      };
    };
  }

  var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
  var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");

  var rho = Math.SQRT2;
  var rho2 = 2;
  var rho4 = 4;
  var epsilon2 = 1e-12;
  function cosh(x) {
    return ((x = Math.exp(x)) + 1 / x) / 2;
  }

  function sinh(x) {
    return ((x = Math.exp(x)) - 1 / x) / 2;
  }

  function tanh(x) {
    return ((x = Math.exp(2 * x)) - 1) / (x + 1);
  }

  // p0 = [ux0, uy0, w0]
  // p1 = [ux1, uy1, w1]
  function zoom(p0, p1) {
    var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
        ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
        dx = ux1 - ux0,
        dy = uy1 - uy0,
        d2 = dx * dx + dy * dy,
        i,
        S;

    // Special case for u0 ≅ u1.
    if (d2 < epsilon2) {
      S = Math.log(w1 / w0) / rho;
      i = function(t) {
        return [
          ux0 + t * dx,
          uy0 + t * dy,
          w0 * Math.exp(rho * t * S)
        ];
      }
    }

    // General case.
    else {
      var d1 = Math.sqrt(d2),
          b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
          b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
          r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
          r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
      S = (r1 - r0) / rho;
      i = function(t) {
        var s = t * S,
            coshr0 = cosh(r0),
            u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
        return [
          ux0 + u * dx,
          uy0 + u * dy,
          w0 * coshr0 / cosh(rho * s + r0)
        ];
      }
    }

    i.duration = S * 1000;

    return i;
  }

  function hsl$1(hue) {
    return function(start, end) {
      var h = hue((start = d3Color.hsl(start)).h, (end = d3Color.hsl(end)).h),
          s = nogamma(start.s, end.s),
          l = nogamma(start.l, end.l),
          opacity = nogamma(start.opacity, end.opacity);
      return function(t) {
        start.h = h(t);
        start.s = s(t);
        start.l = l(t);
        start.opacity = opacity(t);
        return start + "";
      };
    }
  }

  var hsl$2 = hsl$1(hue);
  var hslLong = hsl$1(nogamma);

  function lab$1(start, end) {
    var l = nogamma((start = d3Color.lab(start)).l, (end = d3Color.lab(end)).l),
        a = nogamma(start.a, end.a),
        b = nogamma(start.b, end.b),
        opacity = nogamma(start.opacity, end.opacity);
    return function(t) {
      start.l = l(t);
      start.a = a(t);
      start.b = b(t);
      start.opacity = opacity(t);
      return start + "";
    };
  }

  function hcl$1(hue) {
    return function(start, end) {
      var h = hue((start = d3Color.hcl(start)).h, (end = d3Color.hcl(end)).h),
          c = nogamma(start.c, end.c),
          l = nogamma(start.l, end.l),
          opacity = nogamma(start.opacity, end.opacity);
      return function(t) {
        start.h = h(t);
        start.c = c(t);
        start.l = l(t);
        start.opacity = opacity(t);
        return start + "";
      };
    }
  }

  var hcl$2 = hcl$1(hue);
  var hclLong = hcl$1(nogamma);

  function cubehelix$1(hue) {
    return (function cubehelixGamma(y) {
      y = +y;

      function cubehelix(start, end) {
        var h = hue((start = d3Color.cubehelix(start)).h, (end = d3Color.cubehelix(end)).h),
            s = nogamma(start.s, end.s),
            l = nogamma(start.l, end.l),
            opacity = nogamma(start.opacity, end.opacity);
        return function(t) {
          start.h = h(t);
          start.s = s(t);
          start.l = l(Math.pow(t, y));
          start.opacity = opacity(t);
          return start + "";
        };
      }

      cubehelix.gamma = cubehelixGamma;

      return cubehelix;
    })(1);
  }

  var cubehelix$2 = cubehelix$1(hue);
  var cubehelixLong = cubehelix$1(nogamma);

  function quantize(interpolator, n) {
    var samples = new Array(n);
    for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
    return samples;
  }

  exports.interpolate = value;
  exports.interpolateArray = array;
  exports.interpolateBasis = basis$1;
  exports.interpolateBasisClosed = basisClosed;
  exports.interpolateDate = date;
  exports.interpolateNumber = number;
  exports.interpolateObject = object;
  exports.interpolateRound = round;
  exports.interpolateString = string;
  exports.interpolateTransformCss = interpolateTransformCss;
  exports.interpolateTransformSvg = interpolateTransformSvg;
  exports.interpolateZoom = zoom;
  exports.interpolateRgb = rgb$1;
  exports.interpolateRgbBasis = rgbBasis;
  exports.interpolateRgbBasisClosed = rgbBasisClosed;
  exports.interpolateHsl = hsl$2;
  exports.interpolateHslLong = hslLong;
  exports.interpolateLab = lab$1;
  exports.interpolateHcl = hcl$2;
  exports.interpolateHclLong = hclLong;
  exports.interpolateCubehelix = cubehelix$2;
  exports.interpolateCubehelixLong = cubehelixLong;
  exports.quantize = quantize;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
},{"d3-color":4}],12:[function(require,module,exports){
// https://d3js.org/d3-path/ Version 1.0.2. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.d3 = global.d3 || {})));
}(this, (function (exports) { 'use strict';

var pi = Math.PI;
var tau = 2 * pi;
var epsilon = 1e-6;
var tauEpsilon = tau - epsilon;

function Path() {
  this._x0 = this._y0 = // start of current subpath
  this._x1 = this._y1 = null; // end of current subpath
  this._ = [];
}

function path() {
  return new Path;
}

Path.prototype = path.prototype = {
  constructor: Path,
  moveTo: function(x, y) {
    this._.push("M", this._x0 = this._x1 = +x, ",", this._y0 = this._y1 = +y);
  },
  closePath: function() {
    if (this._x1 !== null) {
      this._x1 = this._x0, this._y1 = this._y0;
      this._.push("Z");
    }
  },
  lineTo: function(x, y) {
    this._.push("L", this._x1 = +x, ",", this._y1 = +y);
  },
  quadraticCurveTo: function(x1, y1, x, y) {
    this._.push("Q", +x1, ",", +y1, ",", this._x1 = +x, ",", this._y1 = +y);
  },
  bezierCurveTo: function(x1, y1, x2, y2, x, y) {
    this._.push("C", +x1, ",", +y1, ",", +x2, ",", +y2, ",", this._x1 = +x, ",", this._y1 = +y);
  },
  arcTo: function(x1, y1, x2, y2, r) {
    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;
    var x0 = this._x1,
        y0 = this._y1,
        x21 = x2 - x1,
        y21 = y2 - y1,
        x01 = x0 - x1,
        y01 = y0 - y1,
        l01_2 = x01 * x01 + y01 * y01;

    // Is the radius negative? Error.
    if (r < 0) throw new Error("negative radius: " + r);

    // Is this path empty? Move to (x1,y1).
    if (this._x1 === null) {
      this._.push(
        "M", this._x1 = x1, ",", this._y1 = y1
      );
    }

    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
    else if (!(l01_2 > epsilon)) {}

    // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
    // Equivalently, is (x1,y1) coincident with (x2,y2)?
    // Or, is the radius zero? Line to (x1,y1).
    else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon) || !r) {
      this._.push(
        "L", this._x1 = x1, ",", this._y1 = y1
      );
    }

    // Otherwise, draw an arc!
    else {
      var x20 = x2 - x0,
          y20 = y2 - y0,
          l21_2 = x21 * x21 + y21 * y21,
          l20_2 = x20 * x20 + y20 * y20,
          l21 = Math.sqrt(l21_2),
          l01 = Math.sqrt(l01_2),
          l = r * Math.tan((pi - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),
          t01 = l / l01,
          t21 = l / l21;

      // If the start tangent is not coincident with (x0,y0), line to.
      if (Math.abs(t01 - 1) > epsilon) {
        this._.push(
          "L", x1 + t01 * x01, ",", y1 + t01 * y01
        );
      }

      this._.push(
        "A", r, ",", r, ",0,0,", +(y01 * x20 > x01 * y20), ",", this._x1 = x1 + t21 * x21, ",", this._y1 = y1 + t21 * y21
      );
    }
  },
  arc: function(x, y, r, a0, a1, ccw) {
    x = +x, y = +y, r = +r;
    var dx = r * Math.cos(a0),
        dy = r * Math.sin(a0),
        x0 = x + dx,
        y0 = y + dy,
        cw = 1 ^ ccw,
        da = ccw ? a0 - a1 : a1 - a0;

    // Is the radius negative? Error.
    if (r < 0) throw new Error("negative radius: " + r);

    // Is this path empty? Move to (x0,y0).
    if (this._x1 === null) {
      this._.push(
        "M", x0, ",", y0
      );
    }

    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).
    else if (Math.abs(this._x1 - x0) > epsilon || Math.abs(this._y1 - y0) > epsilon) {
      this._.push(
        "L", x0, ",", y0
      );
    }

    // Is this arc empty? We’re done.
    if (!r) return;

    // Is this a complete circle? Draw two arcs to complete the circle.
    if (da > tauEpsilon) {
      this._.push(
        "A", r, ",", r, ",0,1,", cw, ",", x - dx, ",", y - dy,
        "A", r, ",", r, ",0,1,", cw, ",", this._x1 = x0, ",", this._y1 = y0
      );
    }

    // Otherwise, draw an arc!
    else {
      if (da < 0) da = da % tau + tau;
      this._.push(
        "A", r, ",", r, ",0,", +(da >= pi), ",", cw, ",", this._x1 = x + r * Math.cos(a1), ",", this._y1 = y + r * Math.sin(a1)
      );
    }
  },
  rect: function(x, y, w, h) {
    this._.push("M", this._x0 = this._x1 = +x, ",", this._y0 = this._y1 = +y, "h", +w, "v", +h, "h", -w, "Z");
  },
  toString: function() {
    return this._.join("");
  }
};

exports.path = path;

Object.defineProperty(exports, '__esModule', { value: true });

})));
},{}],13:[function(require,module,exports){
// https://d3js.org/d3-request/ Version 1.0.2. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-collection'), require('d3-dispatch'), require('d3-dsv')) :
  typeof define === 'function' && define.amd ? define(['exports', 'd3-collection', 'd3-dispatch', 'd3-dsv'], factory) :
  (factory((global.d3 = global.d3 || {}),global.d3,global.d3,global.d3));
}(this, function (exports,d3Collection,d3Dispatch,d3Dsv) { 'use strict';

  function request(url, callback) {
    var request,
        event = d3Dispatch.dispatch("beforesend", "progress", "load", "error"),
        mimeType,
        headers = d3Collection.map(),
        xhr = new XMLHttpRequest,
        user = null,
        password = null,
        response,
        responseType,
        timeout = 0;

    // If IE does not support CORS, use XDomainRequest.
    if (typeof XDomainRequest !== "undefined"
        && !("withCredentials" in xhr)
        && /^(http(s)?:)?\/\//.test(url)) xhr = new XDomainRequest;

    "onload" in xhr
        ? xhr.onload = xhr.onerror = xhr.ontimeout = respond
        : xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); };

    function respond(o) {
      var status = xhr.status, result;
      if (!status && hasResponse(xhr)
          || status >= 200 && status < 300
          || status === 304) {
        if (response) {
          try {
            result = response.call(request, xhr);
          } catch (e) {
            event.call("error", request, e);
            return;
          }
        } else {
          result = xhr;
        }
        event.call("load", request, result);
      } else {
        event.call("error", request, o);
      }
    }

    xhr.onprogress = function(e) {
      event.call("progress", request, e);
    };

    request = {
      header: function(name, value) {
        name = (name + "").toLowerCase();
        if (arguments.length < 2) return headers.get(name);
        if (value == null) headers.remove(name);
        else headers.set(name, value + "");
        return request;
      },

      // If mimeType is non-null and no Accept header is set, a default is used.
      mimeType: function(value) {
        if (!arguments.length) return mimeType;
        mimeType = value == null ? null : value + "";
        return request;
      },

      // Specifies what type the response value should take;
      // for instance, arraybuffer, blob, document, or text.
      responseType: function(value) {
        if (!arguments.length) return responseType;
        responseType = value;
        return request;
      },

      timeout: function(value) {
        if (!arguments.length) return timeout;
        timeout = +value;
        return request;
      },

      user: function(value) {
        return arguments.length < 1 ? user : (user = value == null ? null : value + "", request);
      },

      password: function(value) {
        return arguments.length < 1 ? password : (password = value == null ? null : value + "", request);
      },

      // Specify how to convert the response content to a specific type;
      // changes the callback value on "load" events.
      response: function(value) {
        response = value;
        return request;
      },

      // Alias for send("GET", …).
      get: function(data, callback) {
        return request.send("GET", data, callback);
      },

      // Alias for send("POST", …).
      post: function(data, callback) {
        return request.send("POST", data, callback);
      },

      // If callback is non-null, it will be used for error and load events.
      send: function(method, data, callback) {
        xhr.open(method, url, true, user, password);
        if (mimeType != null && !headers.has("accept")) headers.set("accept", mimeType + ",*/*");
        if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); });
        if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType);
        if (responseType != null) xhr.responseType = responseType;
        if (timeout > 0) xhr.timeout = timeout;
        if (callback == null && typeof data === "function") callback = data, data = null;
        if (callback != null && callback.length === 1) callback = fixCallback(callback);
        if (callback != null) request.on("error", callback).on("load", function(xhr) { callback(null, xhr); });
        event.call("beforesend", request, xhr);
        xhr.send(data == null ? null : data);
        return request;
      },

      abort: function() {
        xhr.abort();
        return request;
      },

      on: function() {
        var value = event.on.apply(event, arguments);
        return value === event ? request : value;
      }
    };

    if (callback != null) {
      if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
      return request.get(callback);
    }

    return request;
  }

  function fixCallback(callback) {
    return function(error, xhr) {
      callback(error == null ? xhr : null);
    };
  }

  function hasResponse(xhr) {
    var type = xhr.responseType;
    return type && type !== "text"
        ? xhr.response // null on error
        : xhr.responseText; // "" on error
  }

  function type(defaultMimeType, response) {
    return function(url, callback) {
      var r = request(url).mimeType(defaultMimeType).response(response);
      if (callback != null) {
        if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
        return r.get(callback);
      }
      return r;
    };
  }

  var html = type("text/html", function(xhr) {
    return document.createRange().createContextualFragment(xhr.responseText);
  });

  var json = type("application/json", function(xhr) {
    return JSON.parse(xhr.responseText);
  });

  var text = type("text/plain", function(xhr) {
    return xhr.responseText;
  });

  var xml = type("application/xml", function(xhr) {
    var xml = xhr.responseXML;
    if (!xml) throw new Error("parse error");
    return xml;
  });

  function dsv(defaultMimeType, parse) {
    return function(url, row, callback) {
      if (arguments.length < 3) callback = row, row = null;
      var r = request(url).mimeType(defaultMimeType);
      r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; };
      r.row(row);
      return callback ? r.get(callback) : r;
    };
  }

  function responseOf(parse, row) {
    return function(request) {
      return parse(request.responseText, row);
    };
  }

  var csv = dsv("text/csv", d3Dsv.csvParse);

  var tsv = dsv("text/tab-separated-values", d3Dsv.tsvParse);

  exports.request = request;
  exports.html = html;
  exports.json = json;
  exports.text = text;
  exports.xml = xml;
  exports.csv = csv;
  exports.tsv = tsv;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
},{"d3-collection":3,"d3-dispatch":7,"d3-dsv":8}],14:[function(require,module,exports){
// https://d3js.org/d3-selection/ Version 1.0.2. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.d3 = global.d3 || {})));
}(this, function (exports) { 'use strict';

  var xhtml = "http://www.w3.org/1999/xhtml";

  var namespaces = {
    svg: "http://www.w3.org/2000/svg",
    xhtml: xhtml,
    xlink: "http://www.w3.org/1999/xlink",
    xml: "http://www.w3.org/XML/1998/namespace",
    xmlns: "http://www.w3.org/2000/xmlns/"
  };

  function namespace(name) {
    var prefix = name += "", i = prefix.indexOf(":");
    if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
    return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
  }

  function creatorInherit(name) {
    return function() {
      var document = this.ownerDocument,
          uri = this.namespaceURI;
      return uri === xhtml && document.documentElement.namespaceURI === xhtml
          ? document.createElement(name)
          : document.createElementNS(uri, name);
    };
  }

  function creatorFixed(fullname) {
    return function() {
      return this.ownerDocument.createElementNS(fullname.space, fullname.local);
    };
  }

  function creator(name) {
    var fullname = namespace(name);
    return (fullname.local
        ? creatorFixed
        : creatorInherit)(fullname);
  }

  var nextId = 0;

  function local() {
    return new Local;
  }

  function Local() {
    this._ = "@" + (++nextId).toString(36);
  }

  Local.prototype = local.prototype = {
    constructor: Local,
    get: function(node) {
      var id = this._;
      while (!(id in node)) if (!(node = node.parentNode)) return;
      return node[id];
    },
    set: function(node, value) {
      return node[this._] = value;
    },
    remove: function(node) {
      return this._ in node && delete node[this._];
    },
    toString: function() {
      return this._;
    }
  };

  var matcher = function(selector) {
    return function() {
      return this.matches(selector);
    };
  };

  if (typeof document !== "undefined") {
    var element = document.documentElement;
    if (!element.matches) {
      var vendorMatches = element.webkitMatchesSelector
          || element.msMatchesSelector
          || element.mozMatchesSelector
          || element.oMatchesSelector;
      matcher = function(selector) {
        return function() {
          return vendorMatches.call(this, selector);
        };
      };
    }
  }

  var matcher$1 = matcher;

  var filterEvents = {};

  exports.event = null;

  if (typeof document !== "undefined") {
    var element$1 = document.documentElement;
    if (!("onmouseenter" in element$1)) {
      filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
    }
  }

  function filterContextListener(listener, index, group) {
    listener = contextListener(listener, index, group);
    return function(event) {
      var related = event.relatedTarget;
      if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
        listener.call(this, event);
      }
    };
  }

  function contextListener(listener, index, group) {
    return function(event1) {
      var event0 = exports.event; // Events can be reentrant (e.g., focus).
      exports.event = event1;
      try {
        listener.call(this, this.__data__, index, group);
      } finally {
        exports.event = event0;
      }
    };
  }

  function parseTypenames(typenames) {
    return typenames.trim().split(/^|\s+/).map(function(t) {
      var name = "", i = t.indexOf(".");
      if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
      return {type: t, name: name};
    });
  }

  function onRemove(typename) {
    return function() {
      var on = this.__on;
      if (!on) return;
      for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
        if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
          this.removeEventListener(o.type, o.listener, o.capture);
        } else {
          on[++i] = o;
        }
      }
      if (++i) on.length = i;
      else delete this.__on;
    };
  }

  function onAdd(typename, value, capture) {
    var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
    return function(d, i, group) {
      var on = this.__on, o, listener = wrap(value, i, group);
      if (on) for (var j = 0, m = on.length; j < m; ++j) {
        if ((o = on[j]).type === typename.type && o.name === typename.name) {
          this.removeEventListener(o.type, o.listener, o.capture);
          this.addEventListener(o.type, o.listener = listener, o.capture = capture);
          o.value = value;
          return;
        }
      }
      this.addEventListener(typename.type, listener, capture);
      o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
      if (!on) this.__on = [o];
      else on.push(o);
    };
  }

  function selection_on(typename, value, capture) {
    var typenames = parseTypenames(typename + ""), i, n = typenames.length, t;

    if (arguments.length < 2) {
      var on = this.node().__on;
      if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
        for (i = 0, o = on[j]; i < n; ++i) {
          if ((t = typenames[i]).type === o.type && t.name === o.name) {
            return o.value;
          }
        }
      }
      return;
    }

    on = value ? onAdd : onRemove;
    if (capture == null) capture = false;
    for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
    return this;
  }

  function customEvent(event1, listener, that, args) {
    var event0 = exports.event;
    event1.sourceEvent = exports.event;
    exports.event = event1;
    try {
      return listener.apply(that, args);
    } finally {
      exports.event = event0;
    }
  }

  function sourceEvent() {
    var current = exports.event, source;
    while (source = current.sourceEvent) current = source;
    return current;
  }

  function point(node, event) {
    var svg = node.ownerSVGElement || node;

    if (svg.createSVGPoint) {
      var point = svg.createSVGPoint();
      point.x = event.clientX, point.y = event.clientY;
      point = point.matrixTransform(node.getScreenCTM().inverse());
      return [point.x, point.y];
    }

    var rect = node.getBoundingClientRect();
    return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
  }

  function mouse(node) {
    var event = sourceEvent();
    if (event.changedTouches) event = event.changedTouches[0];
    return point(node, event);
  }

  function none() {}

  function selector(selector) {
    return selector == null ? none : function() {
      return this.querySelector(selector);
    };
  }

  function selection_select(select) {
    if (typeof select !== "function") select = selector(select);

    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
      for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
        if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
          if ("__data__" in node) subnode.__data__ = node.__data__;
          subgroup[i] = subnode;
        }
      }
    }

    return new Selection(subgroups, this._parents);
  }

  function empty() {
    return [];
  }

  function selectorAll(selector) {
    return selector == null ? empty : function() {
      return this.querySelectorAll(selector);
    };
  }

  function selection_selectAll(select) {
    if (typeof select !== "function") select = selectorAll(select);

    for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
      for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
        if (node = group[i]) {
          subgroups.push(select.call(node, node.__data__, i, group));
          parents.push(node);
        }
      }
    }

    return new Selection(subgroups, parents);
  }

  function selection_filter(match) {
    if (typeof match !== "function") match = matcher$1(match);

    for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
      for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
        if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
          subgroup.push(node);
        }
      }
    }

    return new Selection(subgroups, this._parents);
  }

  function sparse(update) {
    return new Array(update.length);
  }

  function selection_enter() {
    return new Selection(this._enter || this._groups.map(sparse), this._parents);
  }

  function EnterNode(parent, datum) {
    this.ownerDocument = parent.ownerDocument;
    this.namespaceURI = parent.namespaceURI;
    this._next = null;
    this._parent = parent;
    this.__data__ = datum;
  }

  EnterNode.prototype = {
    constructor: EnterNode,
    appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
    insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
    querySelector: function(selector) { return this._parent.querySelector(selector); },
    querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
  };

  function constant(x) {
    return function() {
      return x;
    };
  }

  var keyPrefix = "$"; // Protect against keys like “__proto__”.

  function bindIndex(parent, group, enter, update, exit, data) {
    var i = 0,
        node,
        groupLength = group.length,
        dataLength = data.length;

    // Put any non-null nodes that fit into update.
    // Put any null nodes into enter.
    // Put any remaining data into enter.
    for (; i < dataLength; ++i) {
      if (node = group[i]) {
        node.__data__ = data[i];
        update[i] = node;
      } else {
        enter[i] = new EnterNode(parent, data[i]);
      }
    }

    // Put any non-null nodes that don’t fit into exit.
    for (; i < groupLength; ++i) {
      if (node = group[i]) {
        exit[i] = node;
      }
    }
  }

  function bindKey(parent, group, enter, update, exit, data, key) {
    var i,
        node,
        nodeByKeyValue = {},
        groupLength = group.length,
        dataLength = data.length,
        keyValues = new Array(groupLength),
        keyValue;

    // Compute the key for each node.
    // If multiple nodes have the same key, the duplicates are added to exit.
    for (i = 0; i < groupLength; ++i) {
      if (node = group[i]) {
        keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
        if (keyValue in nodeByKeyValue) {
          exit[i] = node;
        } else {
          nodeByKeyValue[keyValue] = node;
        }
      }
    }

    // Compute the key for each datum.
    // If there a node associated with this key, join and add it to update.
    // If there is not (or the key is a duplicate), add it to enter.
    for (i = 0; i < dataLength; ++i) {
      keyValue = keyPrefix + key.call(parent, data[i], i, data);
      if (node = nodeByKeyValue[keyValue]) {
        update[i] = node;
        node.__data__ = data[i];
        nodeByKeyValue[keyValue] = null;
      } else {
        enter[i] = new EnterNode(parent, data[i]);
      }
    }

    // Add any remaining nodes that were not bound to data to exit.
    for (i = 0; i < groupLength; ++i) {
      if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
        exit[i] = node;
      }
    }
  }

  function selection_data(value, key) {
    if (!value) {
      data = new Array(this.size()), j = -1;
      this.each(function(d) { data[++j] = d; });
      return data;
    }

    var bind = key ? bindKey : bindIndex,
        parents = this._parents,
        groups = this._groups;

    if (typeof value !== "function") value = constant(value);

    for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
      var parent = parents[j],
          group = groups[j],
          groupLength = group.length,
          data = value.call(parent, parent && parent.__data__, j, parents),
          dataLength = data.length,
          enterGroup = enter[j] = new Array(dataLength),
          updateGroup = update[j] = new Array(dataLength),
          exitGroup = exit[j] = new Array(groupLength);

      bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);

      // Now connect the enter nodes to their following update node, such that
      // appendChild can insert the materialized enter node before this node,
      // rather than at the end of the parent node.
      for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
        if (previous = enterGroup[i0]) {
          if (i0 >= i1) i1 = i0 + 1;
          while (!(next = updateGroup[i1]) && ++i1 < dataLength);
          previous._next = next || null;
        }
      }
    }

    update = new Selection(update, parents);
    update._enter = enter;
    update._exit = exit;
    return update;
  }

  function selection_exit() {
    return new Selection(this._exit || this._groups.map(sparse), this._parents);
  }

  function selection_merge(selection) {

    for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
      for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
        if (node = group0[i] || group1[i]) {
          merge[i] = node;
        }
      }
    }

    for (; j < m0; ++j) {
      merges[j] = groups0[j];
    }

    return new Selection(merges, this._parents);
  }

  function selection_order() {

    for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
      for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
        if (node = group[i]) {
          if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
          next = node;
        }
      }
    }

    return this;
  }

  function selection_sort(compare) {
    if (!compare) compare = ascending;

    function compareNode(a, b) {
      return a && b ? compare(a.__data__, b.__data__) : !a - !b;
    }

    for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
      for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
        if (node = group[i]) {
          sortgroup[i] = node;
        }
      }
      sortgroup.sort(compareNode);
    }

    return new Selection(sortgroups, this._parents).order();
  }

  function ascending(a, b) {
    return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
  }

  function selection_call() {
    var callback = arguments[0];
    arguments[0] = this;
    callback.apply(null, arguments);
    return this;
  }

  function selection_nodes() {
    var nodes = new Array(this.size()), i = -1;
    this.each(function() { nodes[++i] = this; });
    return nodes;
  }

  function selection_node() {

    for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
      for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
        var node = group[i];
        if (node) return node;
      }
    }

    return null;
  }

  function selection_size() {
    var size = 0;
    this.each(function() { ++size; });
    return size;
  }

  function selection_empty() {
    return !this.node();
  }

  function selection_each(callback) {

    for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
      for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
        if (node = group[i]) callback.call(node, node.__data__, i, group);
      }
    }

    return this;
  }

  function attrRemove(name) {
    return function() {
      this.removeAttribute(name);
    };
  }

  function attrRemoveNS(fullname) {
    return function() {
      this.removeAttributeNS(fullname.space, fullname.local);
    };
  }

  function attrConstant(name, value) {
    return function() {
      this.setAttribute(name, value);
    };
  }

  function attrConstantNS(fullname, value) {
    return function() {
      this.setAttributeNS(fullname.space, fullname.local, value);
    };
  }

  function attrFunction(name, value) {
    return function() {
      var v = value.apply(this, arguments);
      if (v == null) this.removeAttribute(name);
      else this.setAttribute(name, v);
    };
  }

  function attrFunctionNS(fullname, value) {
    return function() {
      var v = value.apply(this, arguments);
      if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
      else this.setAttributeNS(fullname.space, fullname.local, v);
    };
  }

  function selection_attr(name, value) {
    var fullname = namespace(name);

    if (arguments.length < 2) {
      var node = this.node();
      return fullname.local
          ? node.getAttributeNS(fullname.space, fullname.local)
          : node.getAttribute(fullname);
    }

    return this.each((value == null
        ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
        ? (fullname.local ? attrFunctionNS : attrFunction)
        : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
  }

  function defaultView(node) {
    return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
        || (node.document && node) // node is a Window
        || node.defaultView; // node is a Document
  }

  function styleRemove(name) {
    return function() {
      this.style.removeProperty(name);
    };
  }

  function styleConstant(name, value, priority) {
    return function() {
      this.style.setProperty(name, value, priority);
    };
  }

  function styleFunction(name, value, priority) {
    return function() {
      var v = value.apply(this, arguments);
      if (v == null) this.style.removeProperty(name);
      else this.style.setProperty(name, v, priority);
    };
  }

  function selection_style(name, value, priority) {
    var node;
    return arguments.length > 1
        ? this.each((value == null
              ? styleRemove : typeof value === "function"
              ? styleFunction
              : styleConstant)(name, value, priority == null ? "" : priority))
        : defaultView(node = this.node())
            .getComputedStyle(node, null)
            .getPropertyValue(name);
  }

  function propertyRemove(name) {
    return function() {
      delete this[name];
    };
  }

  function propertyConstant(name, value) {
    return function() {
      this[name] = value;
    };
  }

  function propertyFunction(name, value) {
    return function() {
      var v = value.apply(this, arguments);
      if (v == null) delete this[name];
      else this[name] = v;
    };
  }

  function selection_property(name, value) {
    return arguments.length > 1
        ? this.each((value == null
            ? propertyRemove : typeof value === "function"
            ? propertyFunction
            : propertyConstant)(name, value))
        : this.node()[name];
  }

  function classArray(string) {
    return string.trim().split(/^|\s+/);
  }

  function classList(node) {
    return node.classList || new ClassList(node);
  }

  function ClassList(node) {
    this._node = node;
    this._names = classArray(node.getAttribute("class") || "");
  }

  ClassList.prototype = {
    add: function(name) {
      var i = this._names.indexOf(name);
      if (i < 0) {
        this._names.push(name);
        this._node.setAttribute("class", this._names.join(" "));
      }
    },
    remove: function(name) {
      var i = this._names.indexOf(name);
      if (i >= 0) {
        this._names.splice(i, 1);
        this._node.setAttribute("class", this._names.join(" "));
      }
    },
    contains: function(name) {
      return this._names.indexOf(name) >= 0;
    }
  };

  function classedAdd(node, names) {
    var list = classList(node), i = -1, n = names.length;
    while (++i < n) list.add(names[i]);
  }

  function classedRemove(node, names) {
    var list = classList(node), i = -1, n = names.length;
    while (++i < n) list.remove(names[i]);
  }

  function classedTrue(names) {
    return function() {
      classedAdd(this, names);
    };
  }

  function classedFalse(names) {
    return function() {
      classedRemove(this, names);
    };
  }

  function classedFunction(names, value) {
    return function() {
      (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
    };
  }

  function selection_classed(name, value) {
    var names = classArray(name + "");

    if (arguments.length < 2) {
      var list = classList(this.node()), i = -1, n = names.length;
      while (++i < n) if (!list.contains(names[i])) return false;
      return true;
    }

    return this.each((typeof value === "function"
        ? classedFunction : value
        ? classedTrue
        : classedFalse)(names, value));
  }

  function textRemove() {
    this.textContent = "";
  }

  function textConstant(value) {
    return function() {
      this.textContent = value;
    };
  }

  function textFunction(value) {
    return function() {
      var v = value.apply(this, arguments);
      this.textContent = v == null ? "" : v;
    };
  }

  function selection_text(value) {
    return arguments.length
        ? this.each(value == null
            ? textRemove : (typeof value === "function"
            ? textFunction
            : textConstant)(value))
        : this.node().textContent;
  }

  function htmlRemove() {
    this.innerHTML = "";
  }

  function htmlConstant(value) {
    return function() {
      this.innerHTML = value;
    };
  }

  function htmlFunction(value) {
    return function() {
      var v = value.apply(this, arguments);
      this.innerHTML = v == null ? "" : v;
    };
  }

  function selection_html(value) {
    return arguments.length
        ? this.each(value == null
            ? htmlRemove : (typeof value === "function"
            ? htmlFunction
            : htmlConstant)(value))
        : this.node().innerHTML;
  }

  function raise() {
    if (this.nextSibling) this.parentNode.appendChild(this);
  }

  function selection_raise() {
    return this.each(raise);
  }

  function lower() {
    if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
  }

  function selection_lower() {
    return this.each(lower);
  }

  function selection_append(name) {
    var create = typeof name === "function" ? name : creator(name);
    return this.select(function() {
      return this.appendChild(create.apply(this, arguments));
    });
  }

  function constantNull() {
    return null;
  }

  function selection_insert(name, before) {
    var create = typeof name === "function" ? name : creator(name),
        select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
    return this.select(function() {
      return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
    });
  }

  function remove() {
    var parent = this.parentNode;
    if (parent) parent.removeChild(this);
  }

  function selection_remove() {
    return this.each(remove);
  }

  function selection_datum(value) {
    return arguments.length
        ? this.property("__data__", value)
        : this.node().__data__;
  }

  function dispatchEvent(node, type, params) {
    var window = defaultView(node),
        event = window.CustomEvent;

    if (event) {
      event = new event(type, params);
    } else {
      event = window.document.createEvent("Event");
      if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
      else event.initEvent(type, false, false);
    }

    node.dispatchEvent(event);
  }

  function dispatchConstant(type, params) {
    return function() {
      return dispatchEvent(this, type, params);
    };
  }

  function dispatchFunction(type, params) {
    return function() {
      return dispatchEvent(this, type, params.apply(this, arguments));
    };
  }

  function selection_dispatch(type, params) {
    return this.each((typeof params === "function"
        ? dispatchFunction
        : dispatchConstant)(type, params));
  }

  var root = [null];

  function Selection(groups, parents) {
    this._groups = groups;
    this._parents = parents;
  }

  function selection() {
    return new Selection([[document.documentElement]], root);
  }

  Selection.prototype = selection.prototype = {
    constructor: Selection,
    select: selection_select,
    selectAll: selection_selectAll,
    filter: selection_filter,
    data: selection_data,
    enter: selection_enter,
    exit: selection_exit,
    merge: selection_merge,
    order: selection_order,
    sort: selection_sort,
    call: selection_call,
    nodes: selection_nodes,
    node: selection_node,
    size: selection_size,
    empty: selection_empty,
    each: selection_each,
    attr: selection_attr,
    style: selection_style,
    property: selection_property,
    classed: selection_classed,
    text: selection_text,
    html: selection_html,
    raise: selection_raise,
    lower: selection_lower,
    append: selection_append,
    insert: selection_insert,
    remove: selection_remove,
    datum: selection_datum,
    on: selection_on,
    dispatch: selection_dispatch
  };

  function select(selector) {
    return typeof selector === "string"
        ? new Selection([[document.querySelector(selector)]], [document.documentElement])
        : new Selection([[selector]], root);
  }

  function selectAll(selector) {
    return typeof selector === "string"
        ? new Selection([document.querySelectorAll(selector)], [document.documentElement])
        : new Selection([selector == null ? [] : selector], root);
  }

  function touch(node, touches, identifier) {
    if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;

    for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
      if ((touch = touches[i]).identifier === identifier) {
        return point(node, touch);
      }
    }

    return null;
  }

  function touches(node, touches) {
    if (touches == null) touches = sourceEvent().touches;

    for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {
      points[i] = point(node, touches[i]);
    }

    return points;
  }

  exports.creator = creator;
  exports.local = local;
  exports.matcher = matcher$1;
  exports.mouse = mouse;
  exports.namespace = namespace;
  exports.namespaces = namespaces;
  exports.select = select;
  exports.selectAll = selectAll;
  exports.selection = selection;
  exports.selector = selector;
  exports.selectorAll = selectorAll;
  exports.touch = touch;
  exports.touches = touches;
  exports.window = defaultView;
  exports.customEvent = customEvent;

  Object.defineProperty(exports, '__esModule', { value: true });

}));
},{}],15:[function(require,module,exports){
// https://d3js.org/d3-timer/ Version 1.0.3. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.d3 = global.d3 || {})));
}(this, (function (exports) { 'use strict';

var frame = 0;
var timeout = 0;
var interval = 0;
var pokeDelay = 1000;
var taskHead;
var taskTail;
var clockLast = 0;
var clockNow = 0;
var clockSkew = 0;
var clock = typeof performance === "object" && performance.now ? performance : Date;
var setFrame = typeof requestAnimationFrame === "function" ? requestAnimationFrame : function(f) { setTimeout(f, 17); };
function now() {
  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
}

function clearNow() {
  clockNow = 0;
}

function Timer() {
  this._call =
  this._time =
  this._next = null;
}

Timer.prototype = timer.prototype = {
  constructor: Timer,
  restart: function(callback, delay, time) {
    if (typeof callback !== "function") throw new TypeError("callback is not a function");
    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
    if (!this._next && taskTail !== this) {
      if (taskTail) taskTail._next = this;
      else taskHead = this;
      taskTail = this;
    }
    this._call = callback;
    this._time = time;
    sleep();
  },
  stop: function() {
    if (this._call) {
      this._call = null;
      this._time = Infinity;
      sleep();
    }
  }
};

function timer(callback, delay, time) {
  var t = new Timer;
  t.restart(callback, delay, time);
  return t;
}

function timerFlush() {
  now(); // Get the current time, if not already set.
  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
  var t = taskHead, e;
  while (t) {
    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
    t = t._next;
  }
  --frame;
}

function wake() {
  clockNow = (clockLast = clock.now()) + clockSkew;
  frame = timeout = 0;
  try {
    timerFlush();
  } finally {
    frame = 0;
    nap();
    clockNow = 0;
  }
}

function poke() {
  var now = clock.now(), delay = now - clockLast;
  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
}

function nap() {
  var t0, t1 = taskHead, t2, time = Infinity;
  while (t1) {
    if (t1._call) {
      if (time > t1._time) time = t1._time;
      t0 = t1, t1 = t1._next;
    } else {
      t2 = t1._next, t1._next = null;
      t1 = t0 ? t0._next = t2 : taskHead = t2;
    }
  }
  taskTail = t0;
  sleep(time);
}

function sleep(time) {
  if (frame) return; // Soonest alarm already set, or will be.
  if (timeout) timeout = clearTimeout(timeout);
  var delay = time - clockNow;
  if (delay > 24) {
    if (time < Infinity) timeout = setTimeout(wake, delay);
    if (interval) interval = clearInterval(interval);
  } else {
    if (!interval) interval = setInterval(poke, pokeDelay);
    frame = 1, setFrame(wake);
  }
}

function timeout$1(callback, delay, time) {
  var t = new Timer;
  delay = delay == null ? 0 : +delay;
  t.restart(function(elapsed) {
    t.stop();
    callback(elapsed + delay);
  }, delay, time);
  return t;
}

function interval$1(callback, delay, time) {
  var t = new Timer, total = delay;
  if (delay == null) return t.restart(callback, delay, time), t;
  delay = +delay, time = time == null ? now() : +time;
  t.restart(function tick(elapsed) {
    elapsed += total;
    t.restart(tick, total += delay, time);
    callback(elapsed);
  }, delay, time);
  return t;
}

exports.now = now;
exports.timer = timer;
exports.timerFlush = timerFlush;
exports.timeout = timeout$1;
exports.interval = interval$1;

Object.defineProperty(exports, '__esModule', { value: true });

})));
},{}],16:[function(require,module,exports){
// https://d3js.org/d3-transition/ Version 1.0.2. Copyright 2016 Mike Bostock.
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-selection'), require('d3-dispatch'), require('d3-timer'), require('d3-interpolate'), require('d3-color'), require('d3-ease')) :
  typeof define === 'function' && define.amd ? define(['exports', 'd3-selection', 'd3-dispatch', 'd3-timer', 'd3-interpolate', 'd3-color', 'd3-ease'], factory) :
  (factory((global.d3 = global.d3 || {}),global.d3,global.d3,global.d3,global.d3,global.d3,global.d3));
}(this, (function (exports,d3Selection,d3Dispatch,d3Timer,d3Interpolate,d3Color,d3Ease) { 'use strict';

var emptyOn = d3Dispatch.dispatch("start", "end", "interrupt");
var emptyTween = [];

var CREATED = 0;
var SCHEDULED = 1;
var STARTING = 2;
var STARTED = 3;
var RUNNING = 4;
var ENDING = 5;
var ENDED = 6;

function schedule(node, name, id, index, group, timing) {
  var schedules = node.__transition;
  if (!schedules) node.__transition = {};
  else if (id in schedules) return;
  create(node, id, {
    name: name,
    index: index, // For context during callback.
    group: group, // For context during callback.
    on: emptyOn,
    tween: emptyTween,
    time: timing.time,
    delay: timing.delay,
    duration: timing.duration,
    ease: timing.ease,
    timer: null,
    state: CREATED
  });
}

function init(node, id) {
  var schedule = node.__transition;
  if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late");
  return schedule;
}

function set(node, id) {
  var schedule = node.__transition;
  if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late");
  return schedule;
}

function get(node, id) {
  var schedule = node.__transition;
  if (!schedule || !(schedule = schedule[id])) throw new Error("too late");
  return schedule;
}

function create(node, id, self) {
  var schedules = node.__transition,
      tween;

  // Initialize the self timer when the transition is created.
  // Note the actual delay is not known until the first callback!
  schedules[id] = self;
  self.timer = d3Timer.timer(schedule, 0, self.time);

  function schedule(elapsed) {
    self.state = SCHEDULED;
    self.timer.restart(start, self.delay, self.time);

    // If the elapsed delay is less than our first sleep, start immediately.
    if (self.delay <= elapsed) start(elapsed - self.delay);
  }

  function start(elapsed) {
    var i, j, n, o;

    // If the state is not SCHEDULED, then we previously errored on start.
    if (self.state !== SCHEDULED) return stop();

    for (i in schedules) {
      o = schedules[i];
      if (o.name !== self.name) continue;

      // While this element already has a starting transition during this frame,
      // defer starting an interrupting transition until that transition has a
      // chance to tick (and possibly end); see d3/d3-transition#54!
      if (o.state === STARTED) return d3Timer.timeout(start);

      // Interrupt the active transition, if any.
      // Dispatch the interrupt event.
      if (o.state === RUNNING) {
        o.state = ENDED;
        o.timer.stop();
        o.on.call("interrupt", node, node.__data__, o.index, o.group);
        delete schedules[i];
      }

      // Cancel any pre-empted transitions. No interrupt event is dispatched
      // because the cancelled transitions never started. Note that this also
      // removes this transition from the pending list!
      else if (+i < id) {
        o.state = ENDED;
        o.timer.stop();
        delete schedules[i];
      }
    }

    // Defer the first tick to end of the current frame; see d3/d3#1576.
    // Note the transition may be canceled after start and before the first tick!
    // Note this must be scheduled before the start event; see d3/d3-transition#16!
    // Assuming this is successful, subsequent callbacks go straight to tick.
    d3Timer.timeout(function() {
      if (self.state === STARTED) {
        self.state = RUNNING;
        self.timer.restart(tick, self.delay, self.time);
        tick(elapsed);
      }
    });

    // Dispatch the start event.
    // Note this must be done before the tween are initialized.
    self.state = STARTING;
    self.on.call("start", node, node.__data__, self.index, self.group);
    if (self.state !== STARTING) return; // interrupted
    self.state = STARTED;

    // Initialize the tween, deleting null tween.
    tween = new Array(n = self.tween.length);
    for (i = 0, j = -1; i < n; ++i) {
      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
        tween[++j] = o;
      }
    }
    tween.length = j + 1;
  }

  function tick(elapsed) {
    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
        i = -1,
        n = tween.length;

    while (++i < n) {
      tween[i].call(null, t);
    }

    // Dispatch the end event.
    if (self.state === ENDING) {
      self.on.call("end", node, node.__data__, self.index, self.group);
      stop();
    }
  }

  function stop() {
    self.state = ENDED;
    self.timer.stop();
    delete schedules[id];
    for (var i in schedules) return; // eslint-disable-line no-unused-vars
    delete node.__transition;
  }
}

function interrupt(node, name) {
  var schedules = node.__transition,
      schedule,
      active,
      empty = true,
      i;

  if (!schedules) return;

  name = name == null ? null : name + "";

  for (i in schedules) {
    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
    active = schedule.state === STARTED;
    schedule.state = ENDED;
    schedule.timer.stop();
    if (active) schedule.on.call("interrupt", node, node.__data__, schedule.index, schedule.group);
    delete schedules[i];
  }

  if (empty) delete node.__transition;
}

function selection_interrupt(name) {
  return this.each(function() {
    interrupt(this, name);
  });
}

function tweenRemove(id, name) {
  var tween0, tween1;
  return function() {
    var schedule = set(this, id),
        tween = schedule.tween;

    // If this node shared tween with the previous node,
    // just assign the updated shared tween and we’re done!
    // Otherwise, copy-on-write.
    if (tween !== tween0) {
      tween1 = tween0 = tween;
      for (var i = 0, n = tween1.length; i < n; ++i) {
        if (tween1[i].name === name) {
          tween1 = tween1.slice();
          tween1.splice(i, 1);
          break;
        }
      }
    }

    schedule.tween = tween1;
  };
}

function tweenFunction(id, name, value) {
  var tween0, tween1;
  if (typeof value !== "function") throw new Error;
  return function() {
    var schedule = set(this, id),
        tween = schedule.tween;

    // If this node shared tween with the previous node,
    // just assign the updated shared tween and we’re done!
    // Otherwise, copy-on-write.
    if (tween !== tween0) {
      tween1 = (tween0 = tween).slice();
      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
        if (tween1[i].name === name) {
          tween1[i] = t;
          break;
        }
      }
      if (i === n) tween1.push(t);
    }

    schedule.tween = tween1;
  };
}

function transition_tween(name, value) {
  var id = this._id;

  name += "";

  if (arguments.length < 2) {
    var tween = get(this.node(), id).tween;
    for (var i = 0, n = tween.length, t; i < n; ++i) {
      if ((t = tween[i]).name === name) {
        return t.value;
      }
    }
    return null;
  }

  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
}

function tweenValue(transition, name, value) {
  var id = transition._id;

  transition.each(function() {
    var schedule = set(this, id);
    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
  });

  return function(node) {
    return get(node, id).value[name];
  };
}

function interpolate(a, b) {
  var c;
  return (typeof b === "number" ? d3Interpolate.interpolateNumber
      : b instanceof d3Color.color ? d3Interpolate.interpolateRgb
      : (c = d3Color.color(b)) ? (b = c, d3Interpolate.interpolateRgb)
      : d3Interpolate.interpolateString)(a, b);
}

function attrRemove(name) {
  return function() {
    this.removeAttribute(name);
  };
}

function attrRemoveNS(fullname) {
  return function() {
    this.removeAttributeNS(fullname.space, fullname.local);
  };
}

function attrConstant(name, interpolate, value1) {
  var value00,
      interpolate0;
  return function() {
    var value0 = this.getAttribute(name);
    return value0 === value1 ? null
        : value0 === value00 ? interpolate0
        : interpolate0 = interpolate(value00 = value0, value1);
  };
}

function attrConstantNS(fullname, interpolate, value1) {
  var value00,
      interpolate0;
  return function() {
    var value0 = this.getAttributeNS(fullname.space, fullname.local);
    return value0 === value1 ? null
        : value0 === value00 ? interpolate0
        : interpolate0 = interpolate(value00 = value0, value1);
  };
}

function attrFunction(name, interpolate, value) {
  var value00,
      value10,
      interpolate0;
  return function() {
    var value0, value1 = value(this);
    if (value1 == null) return void this.removeAttribute(name);
    value0 = this.getAttribute(name);
    return value0 === value1 ? null
        : value0 === value00 && value1 === value10 ? interpolate0
        : interpolate0 = interpolate(value00 = value0, value10 = value1);
  };
}

function attrFunctionNS(fullname, interpolate, value) {
  var value00,
      value10,
      interpolate0;
  return function() {
    var value0, value1 = value(this);
    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
    value0 = this.getAttributeNS(fullname.space, fullname.local);
    return value0 === value1 ? null
        : value0 === value00 && value1 === value10 ? interpolate0
        : interpolate0 = interpolate(value00 = value0, value10 = value1);
  };
}

function transition_attr(name, value) {
  var fullname = d3Selection.namespace(name), i = fullname === "transform" ? d3Interpolate.interpolateTransformSvg : interpolate;
  return this.attrTween(name, typeof value === "function"
      ? (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, tweenValue(this, "attr." + name, value))
      : value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname)
      : (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value));
}

function attrTweenNS(fullname, value) {
  function tween() {
    var node = this, i = value.apply(node, arguments);
    return i && function(t) {
      node.setAttributeNS(fullname.space, fullname.local, i(t));
    };
  }
  tween._value = value;
  return tween;
}

function attrTween(name, value) {
  function tween() {
    var node = this, i = value.apply(node, arguments);
    return i && function(t) {
      node.setAttribute(name, i(t));
    };
  }
  tween._value = value;
  return tween;
}

function transition_attrTween(name, value) {
  var key = "attr." + name;
  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
  if (value == null) return this.tween(key, null);
  if (typeof value !== "function") throw new Error;
  var fullname = d3Selection.namespace(name);
  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
}

function delayFunction(id, value) {
  return function() {
    init(this, id).delay = +value.apply(this, arguments);
  };
}

function delayConstant(id, value) {
  return value = +value, function() {
    init(this, id).delay = value;
  };
}

function transition_delay(value) {
  var id = this._id;

  return arguments.length
      ? this.each((typeof value === "function"
          ? delayFunction
          : delayConstant)(id, value))
      : get(this.node(), id).delay;
}

function durationFunction(id, value) {
  return function() {
    set(this, id).duration = +value.apply(this, arguments);
  };
}

function durationConstant(id, value) {
  return value = +value, function() {
    set(this, id).duration = value;
  };
}

function transition_duration(value) {
  var id = this._id;

  return arguments.length
      ? this.each((typeof value === "function"
          ? durationFunction
          : durationConstant)(id, value))
      : get(this.node(), id).duration;
}

function easeConstant(id, value) {
  if (typeof value !== "function") throw new Error;
  return function() {
    set(this, id).ease = value;
  };
}

function transition_ease(value) {
  var id = this._id;

  return arguments.length
      ? this.each(easeConstant(id, value))
      : get(this.node(), id).ease;
}

function transition_filter(match) {
  if (typeof match !== "function") match = d3Selection.matcher(match);

  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
        subgroup.push(node);
      }
    }
  }

  return new Transition(subgroups, this._parents, this._name, this._id);
}

function transition_merge(transition) {
  if (transition._id !== this._id) throw new Error;

  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
      if (node = group0[i] || group1[i]) {
        merge[i] = node;
      }
    }
  }

  for (; j < m0; ++j) {
    merges[j] = groups0[j];
  }

  return new Transition(merges, this._parents, this._name, this._id);
}

function start(name) {
  return (name + "").trim().split(/^|\s+/).every(function(t) {
    var i = t.indexOf(".");
    if (i >= 0) t = t.slice(0, i);
    return !t || t === "start";
  });
}

function onFunction(id, name, listener) {
  var on0, on1, sit = start(name) ? init : set;
  return function() {
    var schedule = sit(this, id),
        on = schedule.on;

    // If this node shared a dispatch with the previous node,
    // just assign the updated shared dispatch and we’re done!
    // Otherwise, copy-on-write.
    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);

    schedule.on = on1;
  };
}

function transition_on(name, listener) {
  var id = this._id;

  return arguments.length < 2
      ? get(this.node(), id).on.on(name)
      : this.each(onFunction(id, name, listener));
}

function removeFunction(id) {
  return function() {
    var parent = this.parentNode;
    for (var i in this.__transition) if (+i !== id) return;
    if (parent) parent.removeChild(this);
  };
}

function transition_remove() {
  return this.on("end.remove", removeFunction(this._id));
}

function transition_select(select) {
  var name = this._name,
      id = this._id;

  if (typeof select !== "function") select = d3Selection.selector(select);

  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
        if ("__data__" in node) subnode.__data__ = node.__data__;
        subgroup[i] = subnode;
        schedule(subgroup[i], name, id, i, subgroup, get(node, id));
      }
    }
  }

  return new Transition(subgroups, this._parents, name, id);
}

function transition_selectAll(select) {
  var name = this._name,
      id = this._id;

  if (typeof select !== "function") select = d3Selection.selectorAll(select);

  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
      if (node = group[i]) {
        for (var children = select.call(node, node.__data__, i, group), child, inherit = get(node, id), k = 0, l = children.length; k < l; ++k) {
          if (child = children[k]) {
            schedule(child, name, id, k, children, inherit);
          }
        }
        subgroups.push(children);
        parents.push(node);
      }
    }
  }

  return new Transition(subgroups, parents, name, id);
}

var Selection = d3Selection.selection.prototype.constructor;

function transition_selection() {
  return new Selection(this._groups, this._parents);
}

function styleRemove(name, interpolate) {
  var value00,
      value10,
      interpolate0;
  return function() {
    var style = d3Selection.window(this).getComputedStyle(this, null),
        value0 = style.getPropertyValue(name),
        value1 = (this.style.removeProperty(name), style.getPropertyValue(name));
    return value0 === value1 ? null
        : value0 === value00 && value1 === value10 ? interpolate0
        : interpolate0 = interpolate(value00 = value0, value10 = value1);
  };
}

function styleRemoveEnd(name) {
  return function() {
    this.style.removeProperty(name);
  };
}

function styleConstant(name, interpolate, value1) {
  var value00,
      interpolate0;
  return function() {
    var value0 = d3Selection.window(this).getComputedStyle(this, null).getPropertyValue(name);
    return value0 === value1 ? null
        : value0 === value00 ? interpolate0
        : interpolate0 = interpolate(value00 = value0, value1);
  };
}

function styleFunction(name, interpolate, value) {
  var value00,
      value10,
      interpolate0;
  return function() {
    var style = d3Selection.window(this).getComputedStyle(this, null),
        value0 = style.getPropertyValue(name),
        value1 = value(this);
    if (value1 == null) value1 = (this.style.removeProperty(name), style.getPropertyValue(name));
    return value0 === value1 ? null
        : value0 === value00 && value1 === value10 ? interpolate0
        : interpolate0 = interpolate(value00 = value0, value10 = value1);
  };
}

function transition_style(name, value, priority) {
  var i = (name += "") === "transform" ? d3Interpolate.interpolateTransformCss : interpolate;
  return value == null ? this
          .styleTween(name, styleRemove(name, i))
          .on("end.style." + name, styleRemoveEnd(name))
      : this.styleTween(name, typeof value === "function"
          ? styleFunction(name, i, tweenValue(this, "style." + name, value))
          : styleConstant(name, i, value), priority);
}

function styleTween(name, value, priority) {
  function tween() {
    var node = this, i = value.apply(node, arguments);
    return i && function(t) {
      node.style.setProperty(name, i(t), priority);
    };
  }
  tween._value = value;
  return tween;
}

function transition_styleTween(name, value, priority) {
  var key = "style." + (name += "");
  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
  if (value == null) return this.tween(key, null);
  if (typeof value !== "function") throw new Error;
  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
}

function textConstant(value) {
  return function() {
    this.textContent = value;
  };
}

function textFunction(value) {
  return function() {
    var value1 = value(this);
    this.textContent = value1 == null ? "" : value1;
  };
}

function transition_text(value) {
  return this.tween("text", typeof value === "function"
      ? textFunction(tweenValue(this, "text", value))
      : textConstant(value == null ? "" : value + ""));
}

function transition_transition() {
  var name = this._name,
      id0 = this._id,
      id1 = newId();

  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
      if (node = group[i]) {
        var inherit = get(node, id0);
        schedule(node, name, id1, i, group, {
          time: inherit.time + inherit.delay + inherit.duration,
          delay: 0,
          duration: inherit.duration,
          ease: inherit.ease
        });
      }
    }
  }

  return new Transition(groups, this._parents, name, id1);
}

var id = 0;

function Transition(groups, parents, name, id) {
  this._groups = groups;
  this._parents = parents;
  this._name = name;
  this._id = id;
}

function transition(name) {
  return d3Selection.selection().transition(name);
}

function newId() {
  return ++id;
}

var selection_prototype = d3Selection.selection.prototype;

Transition.prototype = transition.prototype = {
  constructor: Transition,
  select: transition_select,
  selectAll: transition_selectAll,
  filter: transition_filter,
  merge: transition_merge,
  selection: transition_selection,
  transition: transition_transition,
  call: selection_prototype.call,
  nodes: selection_prototype.nodes,
  node: selection_prototype.node,
  size: selection_prototype.size,
  empty: selection_prototype.empty,
  each: selection_prototype.each,
  on: transition_on,
  attr: transition_attr,
  attrTween: transition_attrTween,
  style: transition_style,
  styleTween: transition_styleTween,
  text: transition_text,
  remove: transition_remove,
  tween: transition_tween,
  delay: transition_delay,
  duration: transition_duration,
  ease: transition_ease
};

var defaultTiming = {
  time: null, // Set on use.
  delay: 0,
  duration: 250,
  ease: d3Ease.easeCubicInOut
};

function inherit(node, id) {
  var timing;
  while (!(timing = node.__transition) || !(timing = timing[id])) {
    if (!(node = node.parentNode)) {
      return defaultTiming.time = d3Timer.now(), defaultTiming;
    }
  }
  return timing;
}

function selection_transition(name) {
  var id,
      timing;

  if (name instanceof Transition) {
    id = name._id, name = name._name;
  } else {
    id = newId(), (timing = defaultTiming).time = d3Timer.now(), name = name == null ? null : name + "";
  }

  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
      if (node = group[i]) {
        schedule(node, name, id, i, group, timing || inherit(node, id));
      }
    }
  }

  return new Transition(groups, this._parents, name, id);
}

d3Selection.selection.prototype.interrupt = selection_interrupt;
d3Selection.selection.prototype.transition = selection_transition;

var root = [null];

function active(node, name) {
  var schedules = node.__transition,
      schedule,
      i;

  if (schedules) {
    name = name == null ? null : name + "";
    for (i in schedules) {
      if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {
        return new Transition([[node]], root, name, +i);
      }
    }
  }

  return null;
}

exports.transition = transition;
exports.active = active;
exports.interrupt = interrupt;

Object.defineProperty(exports, '__esModule', { value: true });

})));
},{"d3-color":4,"d3-dispatch":7,"d3-ease":9,"d3-interpolate":11,"d3-selection":14,"d3-timer":15}],17:[function(require,module,exports){
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.topojson = global.topojson || {})));
}(this, (function (exports) { 'use strict';

function noop() {}

function transformAbsolute(transform) {
  if (!transform) return noop;
  var x0,
      y0,
      kx = transform.scale[0],
      ky = transform.scale[1],
      dx = transform.translate[0],
      dy = transform.translate[1];
  return function(point, i) {
    if (!i) x0 = y0 = 0;
    point[0] = (x0 += point[0]) * kx + dx;
    point[1] = (y0 += point[1]) * ky + dy;
  };
}

function transformRelative(transform) {
  if (!transform) return noop;
  var x0,
      y0,
      kx = transform.scale[0],
      ky = transform.scale[1],
      dx = transform.translate[0],
      dy = transform.translate[1];
  return function(point, i) {
    if (!i) x0 = y0 = 0;
    var x1 = Math.round((point[0] - dx) / kx),
        y1 = Math.round((point[1] - dy) / ky);
    point[0] = x1 - x0;
    point[1] = y1 - y0;
    x0 = x1;
    y0 = y1;
  };
}

function reverse(array, n) {
  var t, j = array.length, i = j - n;
  while (i < --j) t = array[i], array[i++] = array[j], array[j] = t;
}

function bisect(a, x) {
  var lo = 0, hi = a.length;
  while (lo < hi) {
    var mid = lo + hi >>> 1;
    if (a[mid] < x) lo = mid + 1;
    else hi = mid;
  }
  return lo;
}

function feature(topology, o) {
  return o.type === "GeometryCollection" ? {
    type: "FeatureCollection",
    features: o.geometries.map(function(o) { return feature$1(topology, o); })
  } : feature$1(topology, o);
}

function feature$1(topology, o) {
  var f = {
    type: "Feature",
    id: o.id,
    properties: o.properties || {},
    geometry: object(topology, o)
  };
  if (o.id == null) delete f.id;
  return f;
}

function object(topology, o) {
  var absolute = transformAbsolute(topology.transform),
      arcs = topology.arcs;

  function arc(i, points) {
    if (points.length) points.pop();
    for (var a = arcs[i < 0 ? ~i : i], k = 0, n = a.length, p; k < n; ++k) {
      points.push(p = a[k].slice());
      absolute(p, k);
    }
    if (i < 0) reverse(points, n);
  }

  function point(p) {
    p = p.slice();
    absolute(p, 0);
    return p;
  }

  function line(arcs) {
    var points = [];
    for (var i = 0, n = arcs.length; i < n; ++i) arc(arcs[i], points);
    if (points.length < 2) points.push(points[0].slice());
    return points;
  }

  function ring(arcs) {
    var points = line(arcs);
    while (points.length < 4) points.push(points[0].slice());
    return points;
  }

  function polygon(arcs) {
    return arcs.map(ring);
  }

  function geometry(o) {
    var t = o.type;
    return t === "GeometryCollection" ? {type: t, geometries: o.geometries.map(geometry)}
        : t in geometryType ? {type: t, coordinates: geometryType[t](o)}
        : null;
  }

  var geometryType = {
    Point: function(o) { return point(o.coordinates); },
    MultiPoint: function(o) { return o.coordinates.map(point); },
    LineString: function(o) { return line(o.arcs); },
    MultiLineString: function(o) { return o.arcs.map(line); },
    Polygon: function(o) { return polygon(o.arcs); },
    MultiPolygon: function(o) { return o.arcs.map(polygon); }
  };

  return geometry(o);
}

function stitchArcs(topology, arcs) {
  var stitchedArcs = {},
      fragmentByStart = {},
      fragmentByEnd = {},
      fragments = [],
      emptyIndex = -1;

  // Stitch empty arcs first, since they may be subsumed by other arcs.
  arcs.forEach(function(i, j) {
    var arc = topology.arcs[i < 0 ? ~i : i], t;
    if (arc.length < 3 && !arc[1][0] && !arc[1][1]) {
      t = arcs[++emptyIndex], arcs[emptyIndex] = i, arcs[j] = t;
    }
  });

  arcs.forEach(function(i) {
    var e = ends(i),
        start = e[0],
        end = e[1],
        f, g;

    if (f = fragmentByEnd[start]) {
      delete fragmentByEnd[f.end];
      f.push(i);
      f.end = end;
      if (g = fragmentByStart[end]) {
        delete fragmentByStart[g.start];
        var fg = g === f ? f : f.concat(g);
        fragmentByStart[fg.start = f.start] = fragmentByEnd[fg.end = g.end] = fg;
      } else {
        fragmentByStart[f.start] = fragmentByEnd[f.end] = f;
      }
    } else if (f = fragmentByStart[end]) {
      delete fragmentByStart[f.start];
      f.unshift(i);
      f.start = start;
      if (g = fragmentByEnd[start]) {
        delete fragmentByEnd[g.end];
        var gf = g === f ? f : g.concat(f);
        fragmentByStart[gf.start = g.start] = fragmentByEnd[gf.end = f.end] = gf;
      } else {
        fragmentByStart[f.start] = fragmentByEnd[f.end] = f;
      }
    } else {
      f = [i];
      fragmentByStart[f.start = start] = fragmentByEnd[f.end = end] = f;
    }
  });

  function ends(i) {
    var arc = topology.arcs[i < 0 ? ~i : i], p0 = arc[0], p1;
    if (topology.transform) p1 = [0, 0], arc.forEach(function(dp) { p1[0] += dp[0], p1[1] += dp[1]; });
    else p1 = arc[arc.length - 1];
    return i < 0 ? [p1, p0] : [p0, p1];
  }

  function flush(fragmentByEnd, fragmentByStart) {
    for (var k in fragmentByEnd) {
      var f = fragmentByEnd[k];
      delete fragmentByStart[f.start];
      delete f.start;
      delete f.end;
      f.forEach(function(i) { stitchedArcs[i < 0 ? ~i : i] = 1; });
      fragments.push(f);
    }
  }

  flush(fragmentByEnd, fragmentByStart);
  flush(fragmentByStart, fragmentByEnd);
  arcs.forEach(function(i) { if (!stitchedArcs[i < 0 ? ~i : i]) fragments.push([i]); });

  return fragments;
}

function mesh(topology) {
  return object(topology, meshArcs.apply(this, arguments));
}

function meshArcs(topology, o, filter) {
  var arcs = [];

  function arc(i) {
    var j = i < 0 ? ~i : i;
    (geomsByArc[j] || (geomsByArc[j] = [])).push({i: i, g: geom});
  }

  function line(arcs) {
    arcs.forEach(arc);
  }

  function polygon(arcs) {
    arcs.forEach(line);
  }

  function geometry(o) {
    if (o.type === "GeometryCollection") o.geometries.forEach(geometry);
    else if (o.type in geometryType) geom = o, geometryType[o.type](o.arcs);
  }

  if (arguments.length > 1) {
    var geomsByArc = [],
        geom;

    var geometryType = {
      LineString: line,
      MultiLineString: polygon,
      Polygon: polygon,
      MultiPolygon: function(arcs) { arcs.forEach(polygon); }
    };

    geometry(o);

    geomsByArc.forEach(arguments.length < 3
        ? function(geoms) { arcs.push(geoms[0].i); }
        : function(geoms) { if (filter(geoms[0].g, geoms[geoms.length - 1].g)) arcs.push(geoms[0].i); });
  } else {
    for (var i = 0, n = topology.arcs.length; i < n; ++i) arcs.push(i);
  }

  return {type: "MultiLineString", arcs: stitchArcs(topology, arcs)};
}

function cartesianTriangleArea(triangle) {
  var a = triangle[0], b = triangle[1], c = triangle[2];
  return Math.abs((a[0] - c[0]) * (b[1] - a[1]) - (a[0] - b[0]) * (c[1] - a[1]));
}

function ring(ring) {
  var i = -1,
      n = ring.length,
      a,
      b = ring[n - 1],
      area = 0;

  while (++i < n) {
    a = b;
    b = ring[i];
    area += a[0] * b[1] - a[1] * b[0];
  }

  return area / 2;
}

function merge(topology) {
  return object(topology, mergeArcs.apply(this, arguments));
}

function mergeArcs(topology, objects) {
  var polygonsByArc = {},
      polygons = [],
      components = [];

  objects.forEach(function(o) {
    if (o.type === "Polygon") register(o.arcs);
    else if (o.type === "MultiPolygon") o.arcs.forEach(register);
  });

  function register(polygon) {
    polygon.forEach(function(ring$$) {
      ring$$.forEach(function(arc) {
        (polygonsByArc[arc = arc < 0 ? ~arc : arc] || (polygonsByArc[arc] = [])).push(polygon);
      });
    });
    polygons.push(polygon);
  }

  function area(ring$$) {
    return Math.abs(ring(object(topology, {type: "Polygon", arcs: [ring$$]}).coordinates[0]));
  }

  polygons.forEach(function(polygon) {
    if (!polygon._) {
      var component = [],
          neighbors = [polygon];
      polygon._ = 1;
      components.push(component);
      while (polygon = neighbors.pop()) {
        component.push(polygon);
        polygon.forEach(function(ring$$) {
          ring$$.forEach(function(arc) {
            polygonsByArc[arc < 0 ? ~arc : arc].forEach(function(polygon) {
              if (!polygon._) {
                polygon._ = 1;
                neighbors.push(polygon);
              }
            });
          });
        });
      }
    }
  });

  polygons.forEach(function(polygon) {
    delete polygon._;
  });

  return {
    type: "MultiPolygon",
    arcs: components.map(function(polygons) {
      var arcs = [], n;

      // Extract the exterior (unique) arcs.
      polygons.forEach(function(polygon) {
        polygon.forEach(function(ring$$) {
          ring$$.forEach(function(arc) {
            if (polygonsByArc[arc < 0 ? ~arc : arc].length < 2) {
              arcs.push(arc);
            }
          });
        });
      });

      // Stitch the arcs into one or more rings.
      arcs = stitchArcs(topology, arcs);

      // If more than one ring is returned,
      // at most one of these rings can be the exterior;
      // choose the one with the greatest absolute area.
      if ((n = arcs.length) > 1) {
        for (var i = 1, k = area(arcs[0]), ki, t; i < n; ++i) {
          if ((ki = area(arcs[i])) > k) {
            t = arcs[0], arcs[0] = arcs[i], arcs[i] = t, k = ki;
          }
        }
      }

      return arcs;
    })
  };
}

function neighbors(objects) {
  var indexesByArc = {}, // arc index -> array of object indexes
      neighbors = objects.map(function() { return []; });

  function line(arcs, i) {
    arcs.forEach(function(a) {
      if (a < 0) a = ~a;
      var o = indexesByArc[a];
      if (o) o.push(i);
      else indexesByArc[a] = [i];
    });
  }

  function polygon(arcs, i) {
    arcs.forEach(function(arc) { line(arc, i); });
  }

  function geometry(o, i) {
    if (o.type === "GeometryCollection") o.geometries.forEach(function(o) { geometry(o, i); });
    else if (o.type in geometryType) geometryType[o.type](o.arcs, i);
  }

  var geometryType = {
    LineString: line,
    MultiLineString: polygon,
    Polygon: polygon,
    MultiPolygon: function(arcs, i) { arcs.forEach(function(arc) { polygon(arc, i); }); }
  };

  objects.forEach(geometry);

  for (var i in indexesByArc) {
    for (var indexes = indexesByArc[i], m = indexes.length, j = 0; j < m; ++j) {
      for (var k = j + 1; k < m; ++k) {
        var ij = indexes[j], ik = indexes[k], n;
        if ((n = neighbors[ij])[i = bisect(n, ik)] !== ik) n.splice(i, 0, ik);
        if ((n = neighbors[ik])[i = bisect(n, ij)] !== ij) n.splice(i, 0, ij);
      }
    }
  }

  return neighbors;
}

function compareArea(a, b) {
  return a[1][2] - b[1][2];
}

function minAreaHeap() {
  var heap = {},
      array = [],
      size = 0;

  heap.push = function(object) {
    up(array[object._ = size] = object, size++);
    return size;
  };

  heap.pop = function() {
    if (size <= 0) return;
    var removed = array[0], object;
    if (--size > 0) object = array[size], down(array[object._ = 0] = object, 0);
    return removed;
  };

  heap.remove = function(removed) {
    var i = removed._, object;
    if (array[i] !== removed) return; // invalid request
    if (i !== --size) object = array[size], (compareArea(object, removed) < 0 ? up : down)(array[object._ = i] = object, i);
    return i;
  };

  function up(object, i) {
    while (i > 0) {
      var j = ((i + 1) >> 1) - 1,
          parent = array[j];
      if (compareArea(object, parent) >= 0) break;
      array[parent._ = i] = parent;
      array[object._ = i = j] = object;
    }
  }

  function down(object, i) {
    while (true) {
      var r = (i + 1) << 1,
          l = r - 1,
          j = i,
          child = array[j];
      if (l < size && compareArea(array[l], child) < 0) child = array[j = l];
      if (r < size && compareArea(array[r], child) < 0) child = array[j = r];
      if (j === i) break;
      array[child._ = i] = child;
      array[object._ = i = j] = object;
    }
  }

  return heap;
}

function presimplify(topology, triangleArea) {
  var absolute = transformAbsolute(topology.transform),
      relative = transformRelative(topology.transform),
      heap = minAreaHeap();

  if (!triangleArea) triangleArea = cartesianTriangleArea;

  topology.arcs.forEach(function(arc) {
    var triangles = [],
        maxArea = 0,
        triangle,
        i,
        n,
        p;

    // To store each point’s effective area, we create a new array rather than
    // extending the passed-in point to workaround a Chrome/V8 bug (getting
    // stuck in smi mode). For midpoints, the initial effective area of
    // Infinity will be computed in the next step.
    for (i = 0, n = arc.length; i < n; ++i) {
      p = arc[i];
      absolute(arc[i] = [p[0], p[1], Infinity], i);
    }

    for (i = 1, n = arc.length - 1; i < n; ++i) {
      triangle = arc.slice(i - 1, i + 2);
      triangle[1][2] = triangleArea(triangle);
      triangles.push(triangle);
      heap.push(triangle);
    }

    for (i = 0, n = triangles.length; i < n; ++i) {
      triangle = triangles[i];
      triangle.previous = triangles[i - 1];
      triangle.next = triangles[i + 1];
    }

    while (triangle = heap.pop()) {
      var previous = triangle.previous,
          next = triangle.next;

      // If the area of the current point is less than that of the previous point
      // to be eliminated, use the latter's area instead. This ensures that the
      // current point cannot be eliminated without eliminating previously-
      // eliminated points.
      if (triangle[1][2] < maxArea) triangle[1][2] = maxArea;
      else maxArea = triangle[1][2];

      if (previous) {
        previous.next = next;
        previous[2] = triangle[2];
        update(previous);
      }

      if (next) {
        next.previous = previous;
        next[0] = triangle[0];
        update(next);
      }
    }

    arc.forEach(relative);
  });

  function update(triangle) {
    heap.remove(triangle);
    triangle[1][2] = triangleArea(triangle);
    heap.push(triangle);
  }

  return topology;
}

var version = "1.6.27";

exports.version = version;
exports.mesh = mesh;
exports.meshArcs = meshArcs;
exports.merge = merge;
exports.mergeArcs = mergeArcs;
exports.feature = feature;
exports.neighbors = neighbors;
exports.presimplify = presimplify;

Object.defineProperty(exports, '__esModule', { value: true });

})));
},{}]},{},[1]);