WWSD #6: d3.js projections

Working with spatial data

Example #6

Working with d3.js projections for mapping geospatial data

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forked from enjalot's block: WWSD #6: d3.js projections

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script src="//d3js.org/d3.geo.projection.v0.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg { width:100%; height: 100% }
  </style>
</head>

<body>
  <script>
    var width = 960;
    var height = 500;
    
    var svg = d3.select("body").append("svg")
    
  
var projection2 = d3.geo.albers()
    //.center([37.77, -122.43])
    .scale(169)
    .translate([width / 2, height / 2]);

var projection = d3.geo.airy()
    .rotate([86, -55, 29])
    .scale(340)
    .translate([width / 2, height / 2])
    .precision(0.1)
    .clipAngle(83)
    .radius(90);

var path = d3.geo.path()
      .projection(projection);
    
    var url = "https://enjalot.github.io/wwsd/data/world/world-110m.geojson";
    d3.json(url, function(err, geojson) {
      svg.append("path")
        .attr("d", path(geojson))
      
      var point = projection([-122.43, 37.77])

svg.append("circle")
         .attr({
           cx: point[0],
           cy: point[1],
           r: 10,
           fill: "red"
      })
      
    })
    
  </script>
</body>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js

https://d3js.org/d3.geo.projection.v0.min.js

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