D3 Examples - HDI Indonesia Choropleth Map

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
.background {
  fill: none;
  pointer-events: all;
}
​
#subunits {
}
​
#subunits .active {
  fill: orange;
}
​
#state-borders {
  fill: none;
  stroke: #fff;
  stroke-width: 0.1px;
  stroke-linejoin: round;
  stroke-linecap: round;
  pointer-events: none;
}
​
#info-location {
  text-align: center;
  font-size: 26px;
  font-weight: bold;
  font-family:monospace;
}
​
#info-details {
  text-align: center;
  font-size: 22px;
  font-family:monospace;
}
​
</style>
<body>
<svg id='map'></svg>
​
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script>
<script src="https://d3js.org/topojson.v1.min.js"></script>
<script>
​
var width = 960,
    height = 500,
    centered;
​
var ipm = d3.map();
​
var averageIPM = 0;
​
var color = d3.scaleThreshold()
    .domain(d3.range(2,10))
    .range(d3.schemeGreens[9]);
​
var projection = d3.geoEquirectangular()
        .scale(1050)
        .rotate([-120, 0])
        .translate([width / 2, height / 2]);
​
var path = d3.geoPath()
    .projection(projection);
​
var svg = d3.select("#map")
    .attr("width", width)
    .attr("height", height);
​
svg.append("rect")
    .attr("class", "background")
    .attr("width", width)
    .attr("height", height)
    .on("click", clicked);
​
var g = svg.append("g");
​
var x = d3.scaleLinear()
    .domain([1, 10])
    .rangeRound([600, 860]);
​
g.selectAll("rect")
  .data(color.range().map(function(d) {
      d = color.invertExtent(d);
      if (d[0] == null) d[0] = x.domain()[0];
      if (d[1] == null) d[1] = x.domain()[1];
      return d;
    }))
  .enter().append("rect")
    .attr("height", 8)
    .attr("x", function(d) { return x(d[0]); })
    .attr("width", function(d) { return x(d[1]) - x(d[0]); })
    .attr("fill", function(d) { return color(d[0]); });
​
g.append("text")
    .attr("class", "caption")
    .attr("x", x.range()[0])
    .attr("y", 60)
    .attr("fill", "#000")
    .attr("text-anchor", "start")
    .attr("font-weight", "bold")
    .text("Human Development Index : Indonesia");
​
g.call(d3.axisBottom(x)
    .tickSize(13)
    .tickFormat(function(x, i) { return x + "0"; })
    .tickValues(color.domain()))
    .select(".domain")
    .remove();
//*
​
d3.queue()
  .defer(d3.json,"indonesia-topojson-city-regency.json")
  .defer(d3.csv,"./ipm.csv", function(d) {
    ipm.set(d.nama_kabkota, Number(d.ipm/10));
  })
  .await(ready);
​
function ready(error, data) {
  if (error) throw error;
​
  // Calculate Average IPM
  ipm.each(function(d) {
    averageIPM += Number(d)*10;
  });
  averageIPM = (averageIPM/ipm.size()).toPrecision(4);
​
  document.getElementById('info-details').innerHTML = "Human Development Index (Average) : " + averageIPM;
​
  g.append("g")
      .attr("id", "subunits")
      .selectAll("path")
      .data(topojson.feature(data, data.objects.IDN_adm_2_kabkota).features)
      .enter().append("path")
      .attr("fill", function(d) {
        var key = d.properties.NAME_2;
        key = (d.properties.VARNAME_2) ? d.properties.VARNAME_2 : key;
        if(!ipm.get(key)) key = d.properties.NAME_2;
        if(!ipm.get(key)) console.log(d.properties.VARNAME_2,key);
​
        return color(d.ipm = ipm.get(key))
      })
      .attr("d", path)
      .text(function(d) { return d.ipm + "%"; })
      .on("click", clicked);
​
  g.append("path")
      .datum(topojson.mesh(data, data.objects.IDN_adm_2_kabkota, function(a, b) { return a !== b; }))
      .attr("id", "state-borders")
      .attr("d", path);
};
​
function regionName(region) {
​
  return region.properties.NAME_1.toUpperCase() +" : "+ region.properties.NAME_2.toUpperCase();
}
​
function getHDI(region) {
  var key = region.properties.NAME_2;
  if(ipm.get(key)) return (ipm.get(key)*10).toPrecision(4);
  key = region.properties.VARNAME_2;
  if(ipm.get(key)) return (ipm.get(key)*10).toPrecision(4);
​
  return "no data";
}
​
function clicked(d) {
  var x, y, k;
​
  if(d) {
    console.log(d.properties);
    document.getElementById('info-location').innerHTML = regionName(d);
    document.getElementById('info-details').innerHTML = "Human Development Index : " + getHDI(d);
  } else {
    document.getElementById('info-location').innerHTML = "INDONESIA";
    document.getElementById('info-details').innerHTML = "Human Development Index (Average) : " + averageIPM;
  }
​
  if (d && centered !== d) {
    var centroid = path.centroid(d);
    x = centroid[0];
    y = centroid[1];
    k = 4;
    centered = d;
  } else {
    x = width / 2;
    y = height / 2;
    k = 1;
    centered = null;
  }
​
  g.selectAll("path")
      .classed("active", centered && function(d) { return d === centered; });
​
  g.transition()
      .duration(750)
      .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")scale(" + k + ")translate(" + -x + "," + -y + ")")
      .style("stroke-width", 1.5 / k + "px");
}
​
</script>
​
    