Alberta Aboriginal Treaty Lands.
Created
December 6, 2012 21:41
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D3 + Albers + zoom behavior
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="http://d3js.org/d3.v2.js?2.10.3"></script> | |
| <style> | |
| path { | |
| fill: #aaa; | |
| stroke: #fff; | |
| stroke-width: 1.5px; | |
| -webkit-transition: fill .15s ease-in-out; | |
| } | |
| path:hover { | |
| fill: #888; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var width = 960 | |
| var height = 500 | |
| // create chart containers | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| // projection | |
| // see https://github.com/mbostock/d3/wiki/Geo-Projections | |
| var projection = d3.geo.albers() | |
| .origin([-115, 54.5]) | |
| .parallels([48,61]) | |
| .scale(2500) | |
| .translate([width/2, height/2]) | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| // https://github.com/mbostock/d3/wiki/Zoom-Behavior | |
| // see http://bl.ocks.org/2374239 | |
| var zoom = d3.behavior.zoom() | |
| .translate(projection.translate()) | |
| .scale(projection.scale()) | |
| // .scaleExtent([width, 8 * width]) | |
| .on("zoom", zoommove); | |
| var states = svg.append("g") | |
| .attr("id", "states") | |
| .call(zoom) | |
| // treaty polygons | |
| d3.json("ab-treaties.json", function(json) { | |
| states.selectAll("path") | |
| .data(json.features) | |
| .enter().append("path") | |
| .attr("d", path) | |
| }) | |
| function zoommove() { | |
| console.log('zoommove called') | |
| projection.translate(d3.event.translate).scale(d3.event.scale); | |
| states.selectAll("path").attr("d", path); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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