clhenrick/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Working with spatial data

Example #6

Working with d3.js projections for mapping geospatial data
Built with blockbuilder.org
forked from enjalot's block: WWSD #6: d3.js projections

  
## index.html
<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg {
      width:100%;
      height: 100%;
    }
    .graticule {
      fill: none;
      stroke: #777;
      stroke-width: .5px;
      stroke-opacity: .5;
		}

    .fill {
      fill: red;
    }
  </style>
</head>

<body>
  <script src="//d3js.org/d3.geo.projection.v0.min.js"></script>
  <script>
    var width = 960;
    var height = 500;

    var svg = d3.select("body").append("svg")

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

		//https://gist.github.com/mbostock/a7ae83252305ed4d54d4
    var projectionWerner = d3.geo.bonne()
    .center([0, 27])
    .scale(120)
    .translate([width / 2, height / 2])
    .parallel(90)
    .precision(0.2);

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

    var graticule = d3.geo.graticule();

    svg.append("defs").append("path")
    .datum({type: "Sphere"})
    .attr("id", "sphere")
    .attr("d", path);

    svg.append("use")
    .attr("class", "fill")
    .attr("xlink:href", "#sphere");

    svg.append("path")
    .datum(graticule)
    .attr("class", "graticule")
    .attr("d", path);

    var url = "http://enjalot.github.io/wwsd/data/world/world-110m.geojson";

    var sf = projectionWerner([-122.41, 37.77]);

    d3.json(url, function(err, geojson) {
      svg.append("path")
        .attr("d", path(geojson))

      svg.append("circle")
      	.attr({
        	cx: sf[0],
        	cy: sf[1],
        	r: 5,
        	fill: "cornflowerblue"
      });
    })

  </script>
</body>
	<!DOCTYPE html>
	<head>
	<meta charset="utf-8">
	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
	<style>
	body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
	svg {
	width:100%;
	height: 100%;
	}
	.graticule {
	fill: none;
	stroke: #777;
	stroke-width: .5px;
	stroke-opacity: .5;
	}

	.fill {
	fill: red;
	}
	</style>
	</head>

	<body>
	<script src="//d3js.org/d3.geo.projection.v0.min.js"></script>
	<script>
	var width = 960;
	var height = 500;

	var svg = d3.select("body").append("svg")

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

	//https://gist.github.com/mbostock/a7ae83252305ed4d54d4
	var projectionWerner = d3.geo.bonne()
	.center([0, 27])
	.scale(120)
	.translate([width / 2, height / 2])
	.parallel(90)
	.precision(0.2);

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

	var graticule = d3.geo.graticule();

	svg.append("defs").append("path")
	.datum({type: "Sphere"})
	.attr("id", "sphere")
	.attr("d", path);

	svg.append("use")
	.attr("class", "fill")
	.attr("xlink:href", "#sphere");

	svg.append("path")
	.datum(graticule)
	.attr("class", "graticule")
	.attr("d", path);

	var url = "http://enjalot.github.io/wwsd/data/world/world-110m.geojson";

	var sf = projectionWerner([-122.41, 37.77]);

	d3.json(url, function(err, geojson) {
	svg.append("path")
	.attr("d", path(geojson))

	svg.append("circle")
	.attr({
	cx: sf[0],
	cy: sf[1],
	r: 5,
	fill: "cornflowerblue"
	});
	})

	</script>
	</body>