powersa/110m_land.json

## 110m_land.json

      
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## README.md

      
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              README.md
            
          
    This map demonstrates a problem I have animating d3 transitions across the antimeridian. Click the update button to see what I mean. On update the map transitions from .rotate([-160, 0]) (eastern hemisphere) to .rotate([160, 0]) (western hemisphere). Rather than cross the antimeridian, the transition travels the long way round.

  
## HISPEED_1000.json

      
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              HISPEED_1000.json
            
          
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## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  background: #fcfcfa;
}

.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;
}

.points {
  fill: #3182bd;
  stroke-width: .1;
}

.boundary {
  fill: none;
  stroke: #fff;
  stroke-width: .5px;
}

</style>
<body>
<div id="option">
    <input name="updateButton"
                 type="button"
                value="Update"
                onclick="updateData()" />
</div>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>

var width = 425,
    height =425,
    rotate = [10, -10],
    velocity = [.003, -.001],
    time = Date.now();

var projection = d3.geo.orthographic()
    .scale(200)
    .translate([width / 2, height / 2])
    .clipAngle(90)
    .rotate([-160, 0])
    .precision(.1);

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

var graticule = d3.geo.graticule();

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

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("110m_land.json", function(error, world) {
  svg.insert("path")
      .datum(topojson.feature(world, world.objects.ne_110m_land))
      .attr("class", "land")
      .attr("d", path);

  svg.insert("path", ".graticule")
      .datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
      .attr("class", "boundary")
      .attr("d", path);
});

d3.json("HISPEED_1000.json", function(json) {
  svg.selectAll("g")
     .data(json.features)
     .enter()
     .append("path")
       .attr("class", "points")
       .attr("lat", function(d) { return d.geometry.coordinates[0]; })
       .attr("lon", function(d) { return d.geometry.coordinates[1]; })
       .attr("d", path);
});

var transition = d3.transition()
  .duration(2500);

function updateData() {
    d3.transition()
      .duration(3000)
      .tween("rotate", function() {
        var r = d3.interpolate(projection.rotate(), [160, 0]);
        return function(t) {
          projection.rotate(r(t));
          svg.selectAll("path").attr("d", path);
        };
      })
    };

</script>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	background: #fcfcfa;
	}

	.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;
	}

	.points {
	fill: #3182bd;
	stroke-width: .1;
	}

	.boundary {
	fill: none;
	stroke: #fff;
	stroke-width: .5px;
	}

	</style>
	<body>
	<div id="option">
	<input name="updateButton"
	type="button"
	value="Update"
	onclick="updateData()" />
	</div>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://d3js.org/topojson.v1.min.js"></script>
	<script>

	var width = 425,
	height =425,
	rotate = [10, -10],
	velocity = [.003, -.001],
	time = Date.now();

	var projection = d3.geo.orthographic()
	.scale(200)
	.translate([width / 2, height / 2])
	.clipAngle(90)
	.rotate([-160, 0])
	.precision(.1);

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

	var graticule = d3.geo.graticule();

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

	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("110m_land.json", function(error, world) {
	svg.insert("path")
	.datum(topojson.feature(world, world.objects.ne_110m_land))
	.attr("class", "land")
	.attr("d", path);

	svg.insert("path", ".graticule")
	.datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
	.attr("class", "boundary")
	.attr("d", path);
	});

	d3.json("HISPEED_1000.json", function(json) {
	svg.selectAll("g")
	.data(json.features)
	.enter()
	.append("path")
	.attr("class", "points")
	.attr("lat", function(d) { return d.geometry.coordinates[0]; })
	.attr("lon", function(d) { return d.geometry.coordinates[1]; })
	.attr("d", path);
	});

	var transition = d3.transition()
	.duration(2500);

	function updateData() {
	d3.transition()
	.duration(3000)
	.tween("rotate", function() {
	var r = d3.interpolate(projection.rotate(), [160, 0]);
	return function(t) {
	projection.rotate(r(t));
	svg.selectAll("path").attr("d", path);
	};
	})
	};

	</script>