Created
January 7, 2015 21:20
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D3 leaflet apply class value from geojson data
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| <!-- based off the code @ http://bost.ocks.org/mike/leaflet/ --> | |
| <!DOCTYPE html> | |
| <html class=""> | |
| <meta charset="utf-8"> | |
| <title>D3test</title> | |
| <style> | |
| @import url(//cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.2/leaflet.css); | |
| html { height: 100% } | |
| body { height: 100%; margin: 0; padding: 0;} | |
| #map{ height: 100% } | |
| svg { | |
| position: relative; | |
| } | |
| path { | |
| fill: #000; | |
| fill-opacity: .2; | |
| stroke: #fff; | |
| stroke-width: 1.5px; | |
| } | |
| path:hover { | |
| fill: brown; | |
| fill-opacity: .7; | |
| } | |
| </style> | |
| <header></header> | |
| <div id="map"></div> | |
| <footer></footer> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.2/leaflet.js"></script> | |
| <script> | |
| var map = new L.Map("map", {center: [46.861967, -113.982825], zoom: 17}) | |
| .addLayer(new L.TileLayer("http://tile1.map.umt.edu/tiles/tiles.py/composite/{z}/{x}/{y}.png")); | |
| var svg = d3.select(map.getPanes().overlayPane).append("svg"), | |
| g = svg.append("g").attr("class", "leaflet-zoom-hide"); | |
| d3.json("bldgs.geojson", function (collection) { | |
| var transform = d3.geo.transform({point: projectPoint}), | |
| path = d3.geo.path().projection(transform); | |
| var feature = g.selectAll("path") | |
| .data(collection.features) | |
| .enter() | |
| .append("path"); | |
| map.on("viewreset", reset); | |
| reset(); | |
| // Reposition the SVG to cover the features. | |
| function reset() { | |
| var bounds = path.bounds(collection), | |
| topLeft = bounds[0], | |
| bottomRight = bounds[1]; | |
| svg.attr("width", bottomRight[0] - topLeft[0]) | |
| .attr("height", bottomRight[1] - topLeft[1]) | |
| .style("left", topLeft[0] + "px") | |
| .style("top", topLeft[1] + "px"); | |
| g.attr("transform", "translate(" + -topLeft[0] + "," + -topLeft[1] + ")"); | |
| //apply a class with the 'handle' value from the geojson file | |
| feature.attr("class", function (d) { | |
| return "code " + d.handle; | |
| }); | |
| feature.attr("d", path); | |
| } | |
| // Use Leaflet to implement a D3 geometric transformation. | |
| function projectPoint(x, y) { | |
| var point = map.latLngToLayerPoint(new L.LatLng(y, x)); | |
| this.stream.point(point.x, point.y); | |
| } | |
| }); | |
| </script> | |
| <script async src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.4/highlight.min.js"></script> |
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