U.S. States TopoJSON small multiples

A demo of TopoJSON on a U.S. counties shapefile from the census bureau using d3.geo.albersUsa. The same TopoJSON file can also be used to show counties.

forked from mbostock's block: U.S. States TopoJSON small multiple

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

.land {
  fill: #222;
}

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

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

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script>

var width = 96,
    height = 50;

var projection = d3.geo.albersUsa()
    .scale(100)
    .translate([width / 2, height / 2]);

var path = d3.geo.path()
    .projection(projection);

d3.json("https://gist.githubusercontent.com/mbostock/4090846/raw/d534aba169207548a8a3d670c9c2cc719ff05c47/us.json", function(error, us) {
  if (error) throw error;

var land = topojson.feature(us, us.objects.land),
        land_path = path(land),
        counties = topojson.mesh(us, us.objects.counties, function(a, b) { return a !== b && !(a.id / 1000 ^ b.id / 1000); }),
        counties_path = path(counties),
        states = topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; })
        states_path = path(states);
        
    for (var i=1; i<=81; i++) {
      console.log(i, new Date())

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

svg.insert("path", ".graticule")
      .datum(land)
      .attr("class", "land")
      .attr("d", land_path);

svg.insert("path", ".graticule")
      .datum(counties)
      .attr("class", "county-boundary")
      .attr("d", counties_path);

svg.insert("path", ".graticule")
      .datum(states)
      .attr("class", "state-boundary")
      .attr("d", states_path);

}
  });

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

</script>

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

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