rveciana - d3-composite-projections-albersusa

d3-composite-projections albersUsa

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This file shows how to use the albersUsa projection from d3-composite-projections. In this case, the example (and projection) is copied directly from the d3 projection, but adding the borders a the composed zones.

<!DOCTYPE html>
<meta charset="utf-8">

.land {
  fill: #222;

.county-boundary {
  fill: none;
  stroke: #fff;
  stroke-width: .5px;

.state-boundary {
  fill: none;
  stroke: #fff;

<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-composite-projections/0.3.5/albersUsa-proj.min.js"></script>


var width = 960,
    height = 500;

var projection = d3.geo.albersUsa()
    .translate([width / 2, height / 2]);

var path = d3.geo.path()

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

d3.json("/d/4090846/us.json", function(error, us) {
  svg.insert("path", ".graticule")
      .datum(topojson.feature(us, us.objects.land))
      .attr("class", "land")
      .attr("d", path);

  svg.insert("path", ".graticule")
      .datum(topojson.mesh(us, us.objects.counties, function(a, b) { return a !== b && !(a.id / 1000 ^ b.id / 1000); }))
      .attr("class", "county-boundary")
      .attr("d", path);

  svg.insert("path", ".graticule")
      .datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; }))
      .attr("class", "state-boundary")
      .attr("d", path);

      .attr("d", projection.getCompositionBorders());


d3.select(self.frameElement).style("height", height + "px");