Working with d3.js projections for mapping geospatial data
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forked from enjalot's block: WWSD #6: d3.js projections
Created
June 26, 2016 23:47
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WWSD #6: d3.js projections
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <script src="//d3js.org/d3.geo.projection.v0.min.js"></script> | |
| <script src="//d3js.org/topojson.v1.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| svg { width:100%; height: 100% } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var width = 960; | |
| var height = 500; | |
| var svg = d3.select("body").append("svg") | |
| var projection2 = d3.geo.albers() | |
| //.center([37.77, -122.43]) | |
| .scale(169) | |
| .translate([width / 2, height / 2]); | |
| var projection = d3.geo.airy() | |
| .rotate([86, -55, 29]) | |
| .scale(340) | |
| .translate([width / 2, height / 2]) | |
| .precision(0.1) | |
| .clipAngle(83) | |
| .radius(90); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| var url = "http://enjalot.github.io/wwsd/data/world/world-110m.geojson"; | |
| d3.json(url, function(err, geojson) { | |
| svg.append("path") | |
| .attr("d", path(geojson)) | |
| var point = projection([-122.43, 37.77]) | |
| svg.append("circle") | |
| .attr({ | |
| cx: point[0], | |
| cy: point[1], | |
| r: 10, | |
| fill: "red" | |
| }) | |
| }) | |
| </script> | |
| </body> |
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