D3 Examples - SF Precincts

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<!DOCTYPE html>
<meta charset="utf-8">
<head>
  <title>San Francisco Precincts / Prop F</title>
<style>
​
body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: 'Lato', sans-serif;
    color: #272a2f;
}
​
#mapcanvas {
  width: 960px;
  height: 600px;
  margin: 10px 10px 10px 10px;
  /*padding: 5px 5px 5px 5px;*/
  border: 0.5px solid #555;
​
}
  
p {
   margin: 10px 10px 10px 10px;
  }
.precinct {
  fill: #555;
}
​
.precinct-boundary {
  fill: none;
  stroke: #fff;
  stroke-width: none;
}
​
</style>
​
<link href='https://fonts.googleapis.com/css?family=Varela+Round' rel='stylesheet' type='text/css'>
<link href='https://fonts.googleapis.com/css?family=Lato' rel='stylesheet' type='text/css'>
</head>
​
<body>
<div id="mapcanvas" ></div> 
<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 src="https://d3js.org/queue.v1.min.js"></script>
​
<script>
​
​
​
var width = 960,
    height = 600;
​
// PROJECTION   
​
// SF_DOE_Precincts_20120702.prj
// You can also center the map on: -122.51494800050519,37.70813100002812 like in the TopoJSON
/*var projection = d3.geo.conicConformal() 
    .rotate([0, 0, 0])  
    .center([-122.433701, 37.767683])
    .scale(235000)
    .parallels([37.06666666666667, 38.43333333333333])
    .translate([width / 2, height / 2])
    .precision(.1);*/
​
// MERCATOR
var projection = d3.geo.mercator()
    .center([-122.433701, 37.767683])
    .scale(211000)
    .translate([width / 2, 310]);
​
var path = d3.geo.path()
    .projection(projection);
​
​
var svg = d3.select("#mapcanvas").append("svg")
    .attr("width", width)
    .attr("height", height);
​
// Title inside the Map
svg.append("text")
    .attr("x", "50")             
    .attr("y", "29")
    .attr("text-anchor", "start")  
    .style("font-size", "16px") 
    .style("text-decoration", "none")  
    .text("San Francisco Precincts");
​
queue()
      .defer(d3.json, 'san_francisco_precinct_20120702.topojson')               
      .defer(d3.csv, 'san_francisco_precinct_20120702.csv') // REF
      .await(ready);
​
function ready(error, MAP, REF) {
  if (error) throw error; 
  console.log(MAP)  
  console.log(REF)   
​
  var precincts = topojson.feature(MAP, MAP.objects.precinct);  
​
  svg.append("g")
      .attr("class", "precinct")
      .selectAll("path")
      .data(precincts.features)
      .enter()
      .append("path")
      .attr("d", path)
      .append('svg:title').text(function(d) {        
         return ("GeoID: " + d.id); });
​
  //Borders 
  svg.append("path")
      .datum(topojson.mesh(MAP, MAP.objects.precinct, function(a, b) { return a !== b; }))
      .attr("class", "precinct-boundary")
      .attr("d", path); 
 
};
​
</script>
  <p>Let us know about your needs at <a href="https://www.datamap.io/contact">https://www.datamap.io/contact</a></p>
</html>
    