d3.chart('Choropleth', {

    initialize: function() {

        var chart = this;

        chart.brews = {'BuGn': ['#EDF8FB', '#CCECE6', '#CCECE6', '#66C2A4', '#41AE76',
                                '#238B45', '#005824'],
                       'BuPu': ['#EDF8FB', '#BFD3E6', '#9EBCDA', '#8C96C6', '#8C6BB1',
                                '#88419D', '#6E016B'],
                       'GnBu': ['#F0F9E8', '#CCEBC5', '#A8DDB5', '#7BCCC4', '#4EB3D3',
                                '#2B8CBE', '#08589E'],
                       'OrRd': ['#FEF0D9', '#FDD49E', '#FDBB84', '#FC8D59', '#EF6548',
                                '#D7301F', '#990000'],
                       'PuBu': ['#F1EEF6', '#D0D1E6', '#A6BDDB', '#74A9CF', '#3690C0',
                                '#0570B0', '#034E7B'],
                       'PuBuGn': ['#F6EFF7', '#D0D1E6', '#A6BDDB', '#67A9CF', '#3690C0',
                                  '#02818A', '#016450'],
                       'PuRd': ['#F1EEF6', '#D4B9DA', '#C994C7', '#DF65B0', '#E7298A',
                                '#CE1256', '#91003F'],
                       'RdPu': ['#FEEBE2', '#FCC5C0', '#FA9FB5', '#F768A1', '#DD3497',
                                '#AE017E', '#7A0177'],
                       'YlGn': ['#FFFFCC', '#D9F0A3', '#ADDD8E', '#78C679', '#41AB5D',
                                '#238443', '#005A32'],
                       'YlGnBu': ['#FFFFCC', '#C7E9B4', '#7FCDBB', '#41B6C4', '#1D91C0',
                                  '#225EA8', '#0C2C84'],
                       'YlOrBr': ['#FFFFD4', '#FEE391', '#FEC44F', '#FE9929', '#EC7014',
                                  '#CC4C02', '#8C2D04'],
                       'YlOrRd': ['#FFFFB2', '#FED976', '#FEB24C', '#FD8D3C', '#FC4E2A',
                                  '#E31A1C', '#B10026']};

        chart.w = chart.base.attr('width') || 960;
        chart.h = chart.base.attr('height') || 500;
        chart._range = chart._range || chart.brews['YlGnBu'];
        chart._domain = chart._domain || 0;
        chart._path = d3.geo.path();
        chart._projection = chart._projection || d3.geo.mercator();
        chart._scale = chart._scale || 1000;

        chart.quantize = d3.scale.quantize()
          .domain(chart._domain)
          .range(chart._range);

        function dataBind(data) {

          var chart = this.chart();

          chart.geo_data = data['Geo'];
          chart.data = data['ToBind'];

          getMax = function(data) {
            var maxVal = -1;
            for (id in data) {
              var value = data[id];
              if (value > maxVal) {
                maxId = id;
                maxVal = value;
              }
            }
            return maxVal;
          };

          chart._domain = chart._domain === 0 ? [0, getMax(chart.data)] : chart._domain;
          chart.quantize.domain(chart._domain).range(chart._range);

          return this.selectAll("path")
                     .data(chart.geo_data);
        }

        function insert() {
            var chart = this.chart();

            scale = chart._scale;

            return this.append("path")
                .style("fill", function (d) { return chart.quantize(chart.data[d.id]); })
                .attr("d", chart._path.projection(chart._projection
                                                       .scale(chart._scale)
                                                       .translate([chart.w / 2, chart.h / 2])));
        }

        var mapBase = this.base
          .append('g')
          .classed('geodata', true);

        chart.layer('map', mapBase, {
            dataBind: dataBind,
            insert: insert
        });
    },

    width: function(newWidth) {
    if (arguments.length === 0) {
      return this.w;
    }
    this.w = newWidth;
    return this;
    },

    height: function(newHeight) {
      if (arguments.length === 0) {
        return this.h;
      }
      this.h = newHeight;
      return this;
    },

   range: function(newRange) {
     if (arguments.length === 0) {
        return this._range;
      }
      this._range = this.brews[newRange];
      return this;
    },

   domain: function(newDomain) {
     if (arguments.length === 0) {
        return this._domain;
      }
      this._domain= newDomain;
      return this;
    },

    projection: function(newProj) {
     if (arguments.length === 0) {
        return this._projection;
      }
      this._projection= newProj;
      return this;
    },

    scale: function(newScale) {
     if (arguments.length === 0) {
        return this._scale;
      }
      this._scale = newScale;
      return this;
    }

});