D3 Examples - SF police districts

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
.district {
  fill: #ccc;
  stroke: #333;
  stroke-width: .7px;
}
​
.district :hover {
  fill: #845b46;
}
​
</style>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/topojson/1.6.19/topojson.min.js"></script>
<script>
​
var width = 960,
    height = 700;
​
var path = d3.geo.path()
    .projection(null);
​
var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);
​
d3.json("sfp.json", function(error, sfp) {
  if (error) throw error;
​
  var districts = svg.append("g")
      .attr("class","district")
    .selectAll("path")
      .data(topojson.feature(sfp, sfp.objects.sfpd_districts).features)
    .enter().append("path")
      .style("opacity", 0)
      .attr("d", path)
    
  districts.append("title")
    .text(function(d) { return d.properties.district; });
​
  districts.transition().ease("elastic").duration(500).delay(function(d,i) { return 100*i; }).style("opacity",.8);
​
});
​
d3.select(self.frameElement).style("height", height + "px");
​
</script>
    