In contrast to the other example (http://bl.ocks.org/jczaplew/7204160), this example uses the same data, but with all latitudes in the GeoJSON file flipped before converting to TopoJSON. This results in the GeoJSON rendering incorrectly, but the TopoJSON rendering correctly.
Created
October 28, 2013 20:44
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Topojson Paleogeography (reversed latitudes)
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| <!DOCTYPE html> | |
| <html lang="en" xml:lang="en" xmlns= "http://www.w3.org/1999/xhtml"> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <meta http-equiv="Content-Language" content="en" /> | |
| <meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, width=device-width"> | |
| <style> | |
| #map { | |
| height:400px; | |
| } | |
| .plates { | |
| fill: #fff; | |
| stroke:#000; | |
| stroke-width:1px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <p>Topojson</p> | |
| <div id="topoSvgMap"></div> | |
| <p>Geojson</p> | |
| <div id="svgMap"></div> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script src="http://d3js.org/topojson.v1.min.js"></script> | |
| <script src="http://d3js.org/d3.geo.projection.v0.min.js" charset="utf-8"></script> | |
| <script type="text/javascript"> | |
| var height = 500, | |
| width = 960; | |
| var projection = d3.geo.hammer() | |
| .scale(165) | |
| .translate([width / 2, height / 2]) | |
| .precision(.3); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| // Build the geojson map | |
| var svg = d3.select("#svgMap") | |
| .append("svg") | |
| .attr("height", height) | |
| .attr("width", width); | |
| 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"); | |
| d3.json("plates203.geojson", function(er, result) { | |
| svg.insert("path") | |
| .datum(result) | |
| .attr("class", "plates") | |
| .attr("d", path); | |
| }); | |
| // Build the topojson map | |
| var topoSvg = d3.select("#topoSvgMap") | |
| .append("svg") | |
| .attr("height", height) | |
| .attr("width", width); | |
| topoSvg.append("defs").append("path") | |
| .datum({type: "Sphere"}) | |
| .attr("id", "sphere") | |
| .attr("d", path); | |
| topoSvg.append("use") | |
| .attr("class", "stroke") | |
| .attr("xlink:href", "#sphere"); | |
| topoSvg.append("use") | |
| .attr("class", "fill") | |
| .attr("xlink:href", "#sphere"); | |
| d3.json("plates203.topojson", function(er, data) { | |
| topoSvg.insert("path") | |
| .datum(topojson.feature(data, data.objects.plates203)) | |
| .attr("class", "plates") | |
| .attr("d", path); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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