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

      
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              plate0.json
            
          
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	<!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>