rogerfischer/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>
<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 = "http://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>
	<!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 = "http://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>