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testing circles in Leaflet.js (working)
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Testing d3.js in Leaflet.js</title> | |
| <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.4/leaflet.css"></link> | |
| <script src="http://mbostock.github.com/d3/d3.v2.js?2.8.1"></script> | |
| <script src="http://cdn.leafletjs.com/leaflet-0.4/leaflet.js"></script> | |
| <style type="text/css"> | |
| svg , g | |
| { | |
| border: solid 3px red; | |
| stroke-width: 1.5px; | |
| } | |
| circle { | |
| fill: steelblue; | |
| fill-opacity: .8; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map" style="width: 600px; height: 600px;position:relative"></div> | |
| <script type="text/javascript"> | |
| var cloudmadeUrl = 'http://{s}.tile.cloudmade.com/3eb45b95929d472d8fe4a2a5dafbd314/998/256/{z}/{x}/{y}.png', | |
| cloudmadeAttribution = 'Map data © 2011 OpenStreetMap contributors, Imagery © 2011 CloudMade', | |
| cloudmade = new L.TileLayer(cloudmadeUrl, {maxZoom: 18, attribution: cloudmadeAttribution}); | |
| var map = new L.Map('map', { | |
| center: new L.LatLng( 47.0176,2.3427,6), | |
| zoom: 5, | |
| layers: [cloudmade] | |
| }); | |
| /* Initialize the SVG layer */ | |
| map._initPathRoot() | |
| /* We simply pick up the SVG from the map object */ | |
| var svg = d3.select("#map").select("svg"), | |
| g = svg.append("g"); | |
| d3.json("taxa_json.json", function(collection) { | |
| /* Add a LatLng object to each item in the dataset */ | |
| collection.features.forEach(function(d) { | |
| d.LatLng = new L.LatLng(d.geometry.coordinates[1],d.geometry.coordinates[0]) | |
| }) | |
| var feature = g.selectAll("circle") | |
| .data(collection.features) | |
| .enter().append("circle").attr("r", function (d) { return d.properties.count/20 }); | |
| function update() { | |
| feature.attr("cx",function(d) { return map.latLngToLayerPoint(d.LatLng).x}) | |
| feature.attr("cy",function(d) { return map.latLngToLayerPoint(d.LatLng).y}) | |
| feature.attr("r",function(d) { return d.properties.count/1400*Math.pow(2,map.getZoom())}) | |
| } | |
| map.on("viewreset", update); | |
| update(); | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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