Commutes 2012

This map shows the number of commuters to Dutch municipalities in 2012. Click on a municipality to see were the commuters working there are living.

Source: CBS Statline

<!DOCTYPE html>
<meta charset="utf-8">
<style>
  path {
    fill: lightgrey;
  }
</style>
<div id="viz"></div>
<script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script src="https://d3js.org/queue.v1.min.js"></script>
<script>
var width = 960,
  height = 500;

var svg = d3.select("#viz").append("svg")
  .attr("width",width)
  .attr("height",height)
  .attr("id", "root")
  .append("g")
    .call(d3.behavior.zoom().scaleExtent([1, 8]).on("zoom", zoom))
  .append("g");

var text = d3.select("#root").append("text")
  .text("Click on a municipality...")
  .attr("id","legend")
  .attr("transform","translate(10,15)");
	  
var path,
    banenByID;
  
var colours = ["#fef0d9","#fdd49e","#fdbb84", "#fc8d59", "#ef6548", "#d7301f", "#990000", "#990000"];

var heatmapColour = d3.scale.linear()
  .domain(d3.range(0, 1, 1.0 / (colours.length - 1)))
  .range(colours);
  
var c = d3.scale.linear().domain([0,10]).range([0,1]);

queue()
  .defer(d3.json,"https://dl.dropboxusercontent.com/s/k066kxpah3aw8oy/nlGem2012wgs.json?dl=1")
  .defer(d3.tsv,"https://dl.dropboxusercontent.com/s/w3ojz1g4458s8yr/nlGemForens2012.tsv?dl=1")
  .await(ready);
  
function ready(error, mapdata,_banen) {
  
  var gemIdByName = {};
  mapdata.features.forEach(function(d) {
    gemIdByName[d.properties.name] = d.properties.code;
  });
  
  banenByID = {};
  _banen.forEach(function(d) {
    banenByID[d.gemcode] = d;
  });
  
  var center = d3.geo.centroid(mapdata);
  var scale = 100;
  var offset = [width/2, height/2];
  var projection = d3.geo.mercator()
    .scale(scale)
    .center(center)
    .translate(offset);
    
  path = d3.geo.path()
    .projection(projection);
    
  var bounds  = path.bounds(mapdata);
  var hscale  = scale*width  / (bounds[1][0] - bounds[0][0]);
  var vscale  = scale*height / (bounds[1][1] - bounds[0][1]);
  var scale   = (hscale < vscale) ? hscale : vscale;
  var offset  = [width - (bounds[0][0] + bounds[1][0])/2,
    height -20 -(bounds[0][1] + bounds[1][1])/2];
    
  projection = d3.geo.mercator()
    .center(center)
    .scale(scale)
    .translate(offset);
    
  path = path.projection(projection);
  
  var map = svg.append("g");  
  
  var gems = map.selectAll("path")
    .data(mapdata.features)
   .enter().append("path")
    .attr("d", path)
    .attr("class", function(d) {return "gems G"+pad(d.properties.GEMNR,4)})
    .on("click",function(d){doIt(d)});
    
  var arrows = svg.selectAll("arrows")
    .data(mapdata.features).enter()
    .append("g")
    .attr("transform", function (d) {
      cx = path.centroid(d)[0];
      cy = path.centroid(d)[1];
      return "translate("+cx+","+cy+")"; });
      
  var arrow = arrows.append("g")
    .attr("class","a")
    .style("display", "none");
    
  arrow.append("path")
  	.attr("class",function (d) {return "arrow p" + d.properties.GEMNR})
    .attr("d", "M6 0 L1 0.5 L-6 0.5 L-6 -0.5 L1 -0.5 Z")
    .style("fill", "steelblue");
  
};

function compassAngle(p, center, duration) {
	p.transition("compassAngle")
	  .duration(duration)
	  .ease("elastic-in")
	  .attr("transform", function(d) {return "rotate("+angleDeg(path.centroid(d),center)+")"});
}

function compassWidth(p, duration) {
	p.select(".arrow").transition("compassWidth")
	  .duration(duration)
	  .style("stroke-width", function(d) {return banen["G"+pad(d.properties.GEMNR,4)]})
	  .attr("transform", function(d) {
	  	v = banen["G"+pad(d.properties.GEMNR,4)];
	  	return "scale(1 " + v +")"});
	
}

function angleDeg(p1,p2) {
	return Math.atan2(p2[1] - p1[1], p2[0] - p1[0]) * 180 / Math.PI;
}

function pad(num, size) {
    var s = num+"";
    while (s.length < size) s = "0" + s;
    return s;
}

function zoom() {
  svg.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}
</script>

Modified http://d3js.org/queue.v1.min.js to a secure url

https://d3js.org/d3.v3.min.js

https://d3js.org/queue.v1.min.js