jczaplew/README.md

## README.md

      
    Raw
  

              README.md
            
          
    An updated version of https://gist.github.com/jczaplew/6453048 or http://bl.ocks.org/jczaplew/6453048 using the logic from this example http://mbostock.github.io/d3/talk/20111018/azimuthal.html

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
  background: #fcfcfa;
  height: 500px;
  position: relative;
  width: 960px;
}
.stroke {
  fill: none;
  stroke: #000;
  stroke-width: 3px;
}
.fill {
  fill: #fff;
}
.graticule {
  fill: none;
  stroke: #777;
  stroke-width: .5px;
  stroke-opacity: .5;
}
.land {
  fill: #222;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>

var width = 960,
    height = 500,
    rotate = [0,0],
    graticule = d3.geo.graticule();

var projection = d3.geo.azimuthalEqualArea()
     .scale(250)
     .precision(0.3)
     .clipAngle(180 - 1e-3)
     .rotate(rotate);

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

var m0,
    o0;

var drag = d3.behavior.drag()
    .on("dragstart", function() {
    // Adapted from http://mbostock.github.io/d3/talk/20111018/azimuthal.html and updated for d3 v3
      var proj = projection.rotate();
      m0 = [d3.event.sourceEvent.pageX, d3.event.sourceEvent.pageY];
      o0 = [-proj[0],-proj[1]];
    })
    .on("drag", function() {
      if (m0) {
        var m1 = [d3.event.sourceEvent.pageX, d3.event.sourceEvent.pageY],
            o1 = [o0[0] + (m0[0] - m1[0]) / 4, o0[1] + (m1[1] - m0[1]) / 4];
        projection.rotate([-o1[0], -o1[1]]);
      }

    // Update the map
      path = d3.geo.path().projection(projection);
      d3.selectAll("path").attr("d", path);
    });

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
    .call(drag);

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

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

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

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

d3.json("plate0.json", function(error, plates) {
  svg.insert("path", ".graticule")
      .datum(topojson.feature(plates, plates.objects.plates0))
      .attr("class", "land")
      .attr("d", path);
});

</script>
</body>
</html>

## plate0.json

      
Display the source blob

    
Display the rendered blob

    
    Raw
  

              plate0.json
            
          
      Loading

      Sorry, something went wrong. Reload?
      Sorry, we cannot display this file.
      Sorry, this file is invalid so it cannot be displayed.
      
          Viewer requires iframe.
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	body {
	background: #fcfcfa;
	height: 500px;
	position: relative;
	width: 960px;
	}
	.stroke {
	fill: none;
	stroke: #000;
	stroke-width: 3px;
	}
	.fill {
	fill: #fff;
	}
	.graticule {
	fill: none;
	stroke: #777;
	stroke-width: .5px;
	stroke-opacity: .5;
	}
	.land {
	fill: #222;
	}
	</style>
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://d3js.org/topojson.v1.min.js"></script>
	<script>

	var width = 960,
	height = 500,
	rotate = [0,0],
	graticule = d3.geo.graticule();

	var projection = d3.geo.azimuthalEqualArea()
	.scale(250)
	.precision(0.3)
	.clipAngle(180 - 1e-3)
	.rotate(rotate);

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

	var m0,
	o0;

	var drag = d3.behavior.drag()
	.on("dragstart", function() {
	// Adapted from http://mbostock.github.io/d3/talk/20111018/azimuthal.html and updated for d3 v3
	var proj = projection.rotate();
	m0 = [d3.event.sourceEvent.pageX, d3.event.sourceEvent.pageY];
	o0 = [-proj[0],-proj[1]];
	})
	.on("drag", function() {
	if (m0) {
	var m1 = [d3.event.sourceEvent.pageX, d3.event.sourceEvent.pageY],
	o1 = [o0[0] + (m0[0] - m1[0]) / 4, o0[1] + (m1[1] - m0[1]) / 4];
	projection.rotate([-o1[0], -o1[1]]);
	}

	// Update the map
	path = d3.geo.path().projection(projection);
	d3.selectAll("path").attr("d", path);
	});

	var svg = d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height)
	.call(drag);

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

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

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

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

	d3.json("plate0.json", function(error, plates) {
	svg.insert("path", ".graticule")
	.datum(topojson.feature(plates, plates.objects.plates0))
	.attr("class", "land")
	.attr("d", path);
	});

	</script>
	</body>
	</html>