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Using d3.behavior.drag with a map
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| background: #fcfcfa; | |
| height: 500px; | |
| position: relative; | |
| width: 960px; | |
| } | |
| #projection-menu { | |
| position: absolute; | |
| right: 10px; | |
| top: 10px; | |
| } | |
| .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 drag = d3.behavior.drag() | |
| .origin(function() { return {x: rotate[0], y: -rotate[1]}; }) | |
| .on("drag", function() { | |
| rotate[0] = d3.event.x; | |
| rotate[1] = -d3.event.y; | |
| projection.rotate(rotate); | |
| 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> |
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