D3 Examples - ZipScribble Switzerland

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
  background: #222;
}
#input {
  position: absolute;
  top: 20px;
  left: 20px;
}
path {
  fill: none;
}
</style>
<body>
<input autofocus id="input" type="text" placeholder="Type a Postal Code" maxlength="4" />
<script src="https://d3js.org/d3.v3.min.js"></script>
<script type="text/javascript">
​
var width = 960,
    height = 500;
​
var projection = d3.geo.albers()
  .rotate([0, 0])
  .center([8.23, 46.8])
  .scale(13000);
​
var color = d3.scale.category10();
​
var path = d3.svg.line()
  .x(function(d) { return d.x; })
  .y(function(d) { return d.y; });
​
var vis = d3.select("body").append("svg")
  .attr("width", width)
  .attr("height", height);
​
d3.tsv("ch.tsv", function(error, postalCodes) {
  postalCodes.forEach(function(d) {
    var coords = projection([d.longitude, d.latitude]);
    d.x = Math.round(coords[0]);
    d.y = Math.round(coords[1]);
  })
​
  groupedCodes = d3.nest()
    .key(function(d) { return d.postalCode.substr(0, 1); })
    .sortKeys(d3.ascending)
    .key(function(d) { return d.postalCode.substr(0, 2); })
    .sortKeys(d3.ascending)
    .key(function(d) { return d.postalCode.substr(0, 3); })
    .sortKeys(d3.ascending)
    .entries(postalCodes);
​
  var l1 = vis.selectAll(".l1")
    .data(groupedCodes);
  l1.enter().append("g")
    .attr("class", "l1")
    .style("stroke", function(d) { return color(d.key); });
​
  // L2 placeholder. Stroke coloring could also be done here.
  var l2 = l1.selectAll(".l2")
    .data(function(d) { return d.values; })
  l2.enter().append("g")
    .attr("class", "l2");
​
  var l3 = l2.selectAll(".l3")
    .data(function(d) { return d.values; })
  l3.enter().append("path")
    .attr("class", "l3")
    .attr("d", function(d) { return path(d.values); });
​
  d3.select("#input")
    .on("keyup", function() {
      var inputCode = this.value;
      l3.transition().duration(600)
        .style("stroke", function(d) {
          return d.key.indexOf(inputCode) === 0 ? null : "#000";
        });
    });
});
</script>
​
    