Created
October 23, 2015 22:52
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Experimenting with d3.geo layer on a leaflet map
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Pipeline test</title> | |
| <meta charset="UTF-8"> | |
| <meta name="description" content="" /> | |
| <meta name="keywords" content="" /> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js" charset="utf-8"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/topojson/1.6.19/topojson.min.js"></script> | |
| <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.5/leaflet.css" /> | |
| <script src="http://cdn.leafletjs.com/leaflet-0.7.5/leaflet.js"></script> | |
| <script type="text/javascript" src="http://maps.stamen.com/js/tile.stamen.js?v1.3.0"></script> | |
| <style> | |
| #map { | |
| width: 960px; | |
| height: 500px; | |
| } | |
| svg { | |
| position: relative; | |
| } | |
| .pipes { | |
| stroke-width: 2; | |
| fill: none; | |
| stroke-linejoin: "round"; | |
| } | |
| .hp { | |
| stroke: #f03b20; | |
| } | |
| .t { | |
| stroke: #d9b410; | |
| } | |
| .streets { | |
| stroke-width: 1; | |
| stroke: #cbcbca; | |
| stroke-linejoin: "round"; | |
| } | |
| /* | |
| .pipes:hover { | |
| stroke: #d98410; | |
| } | |
| */ | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map"></div> | |
| <script> | |
| var undermap = new L.StamenTileLayer("toner-lite"); | |
| var map = new L.Map("map", { center: [34.05, -118.25], zoom: 10 }) | |
| .addLayer(undermap); | |
| var svg = d3.select(map.getPanes().overlayPane).append("svg"), | |
| g = svg.append("g").attr("class", "leaflet-zoom-hide"); | |
| d3.json("pipeline_hp.json", function(error, collection) { | |
| if (error) throw error; | |
| var transform = d3.geo.transform({point: projectPoint}), | |
| path = d3.geo.path().projection(transform); | |
| var feature = g.selectAll("path") | |
| .data(collection.features) | |
| .enter().append("path") | |
| .attr("class", "pipes hp") | |
| 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[0]) | |
| .style("left", topLeft[0] + "px") | |
| .style("top", topLeft[1] + "px"); | |
| g.attr("transform", "translate(" + -topLeft[0] + "," + -topLeft[1] + ")"); | |
| feature.attr("d", path); | |
| } | |
| function projectPoint(x, y){ | |
| var point = map.latLngToLayerPoint(new L.LatLng(y, x)); | |
| this.stream.point(point.x, point.y); | |
| } | |
| }) | |
| // var width = 800, | |
| // height = 600; | |
| // | |
| // var svg = d3.select("body") | |
| // .append("svg") | |
| // .attr("width", width) | |
| // .attr("height", height); | |
| // | |
| // var projection = d3.geo.mercator() | |
| //// .rotate(); | |
| // | |
| // var path = d3.geo.path() | |
| // .projection(projection); | |
| // | |
| // // Load high-pressure pipeline | |
| // d3.json("pipeline_hp.json", function(error, data){ | |
| // if (error) throw error; | |
| // | |
| // projection | |
| // .scale(1) | |
| // .translate([0,0]); | |
| // | |
| // var b = path.bounds(data), | |
| // s = .95 / Math.max((b[1][0] - b[0][0]) / width, (b[1][1] - b[0][1]) / height), | |
| // t = [(width - s * (b[1][0] + b[0][0])) / 2, (height - s * (b[1][1] + b[0][1])) / 2]; | |
| // | |
| // projection | |
| // .scale(s) | |
| // .translate(t); | |
| // | |
| // svg.append("path") | |
| // .datum(data) | |
| // .attr("class", "pipes hp") | |
| // .attr("d", path); | |
| // | |
| // | |
| // // Load transmission pipeline | |
| // d3.json("pipeline_t.json", function(error, data2){ | |
| // if (error) throw error; | |
| // | |
| // svg.append("path") | |
| // .datum(data2) | |
| // .attr("class", "pipes t") | |
| // .attr("d", path); | |
| // | |
| // }); | |
| // | |
| // }); | |
| </script> | |
| </body> | |
| </html> |
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