Adapting d3.geo.tile to show OpenStreetMap vector tiles. Via Mike Bostock's example.
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Vector Tiles in D3, darkened
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| margin: 0; | |
| background:#031536; | |
| } | |
| .map { | |
| position: absolute; | |
| overflow: hidden; | |
| top:0px; | |
| bottom:0px; | |
| } | |
| .layer { | |
| position: absolute; | |
| } | |
| .tile { | |
| position: absolute; | |
| width: 256px; | |
| height: 256px; | |
| } | |
| .tile path { | |
| fill: none; | |
| stroke: #000; | |
| stroke-linejoin: round; | |
| stroke-linecap: round; | |
| } | |
| .tile .major_road { stroke: url(#grad2); stroke-width:1.8;} | |
| .tile .minor_road { stroke: url(#grad3); stroke-width:1.2;} | |
| .tile .highway { stroke: url(#grad1); stroke-width: 3px; stroke-linecap: round; stroke-linejoin: round; } | |
| .tile .rail { stroke: url(#grad4); stroke-dasharray:4; stroke-dashoffset:4; stroke-width:1; } | |
| .tile .path { stroke: url(#grad5); stroke-dasharray:2; stroke-dashoffset:4; stroke-width:0.8; } | |
| .info { | |
| position: absolute; | |
| bottom: 10px; | |
| left: 10px; | |
| color:#fff; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/d3.geo.tile.v0.min.js"></script> | |
| <svg> | |
| <defs> | |
| <linearGradient id='grad1'> | |
| <stop offset='0%' stop-color='#E8DDC9'/> | |
| <stop offset='100%' stop-color='#E8DDC9' stop-opacity='0' /> | |
| </linearGradient> | |
| <linearGradient id='grad2'> | |
| <stop offset='0%' stop-color='#CCB479'/> | |
| <stop offset='100%' stop-color='#CCB479' stop-opacity='0' /> | |
| </linearGradient> | |
| <linearGradient id='grad3'> | |
| <stop offset='0%' stop-color='#3C80A9'/> | |
| <stop offset='100%' stop-color='#3C80A9' stop-opacity='0' /> | |
| </linearGradient> | |
| <linearGradient id='grad4'> | |
| <stop offset='0%' stop-color='#7de'/> | |
| <stop offset='100%' stop-color='#7de' stop-opacity='0' /> | |
| </linearGradient> | |
| <linearGradient id='grad5'> | |
| <stop offset='0%' stop-color='#74DC9B'/> | |
| <stop offset='100%' stop-color='#74DC9B' stop-opacity='0' /> | |
| </linearGradient> | |
| </defs> | |
| </svg> | |
| <script> | |
| var width = Math.max(960, window.innerWidth), | |
| height = Math.max(500, window.innerHeight), | |
| prefix = prefixMatch(["webkit", "ms", "Moz", "O"]); | |
| var tile = d3.geo.tile() | |
| .size([width, height]); | |
| var projection = d3.geo.mercator() | |
| .scale((1 << 23) / 2 / Math.PI) | |
| .translate([-width / 2, -height / 2]); // just temporary | |
| var tileProjection = d3.geo.mercator(); | |
| var tilePath = d3.geo.path() | |
| .projection(tileProjection); | |
| var zoom = d3.behavior.zoom() | |
| .scale(projection.scale() * 2 * Math.PI) | |
| .scaleExtent([1 << 20, 1 << 23]) | |
| .translate(projection([-77.045446166, 38.89370499]).map(function(x) { return -x; })) | |
| .on("zoom", zoomed); | |
| var map = d3.select("body").append("div") | |
| .attr("class", "map") | |
| .style("width", width + "px") | |
| .style("height", height + "px") | |
| .call(zoom) | |
| .on("mousemove", mousemoved); | |
| var layer = map.append("div") | |
| .attr("class", "layer"); | |
| var info = map.append("div") | |
| .attr("class", "info"); | |
| zoomed(); | |
| function zoomed() { | |
| var tiles = tile | |
| .scale(zoom.scale()) | |
| .translate(zoom.translate()) | |
| (); | |
| projection | |
| .scale(zoom.scale() / 2 / Math.PI) | |
| .translate(zoom.translate()); | |
| var image = layer | |
| .style(prefix + "transform", matrix3d(tiles.scale, tiles.translate)) | |
| .selectAll(".tile") | |
| .data(tiles, function(d) { return d; }); | |
| image.exit() | |
| .each(function(d) { this._xhr.abort(); }) | |
| .remove(); | |
| image.enter().append("svg") | |
| .attr("class", "tile") | |
| .style("left", function(d) { return d[0] * 256 + "px"; }) | |
| .style("top", function(d) { return d[1] * 256 + "px"; }) | |
| .each(function(d) { | |
| var svg = d3.select(this); | |
| this._xhr = d3.json("http://" + ["a", "b", "c"][(d[0] * 31 + d[1]) % 3] + ".tile.openstreetmap.us/vectiles-highroad/" + d[2] + "/" + d[0] + "/" + d[1] + ".json", function(error, json) { | |
| var k = Math.pow(2, d[2]) * 256; // size of the world in pixels | |
| tilePath.projection() | |
| .translate([k / 2 - d[0] * 256, k / 2 - d[1] * 256]) // [0°,0°] in pixels | |
| .scale(k / 2 / Math.PI); | |
| svg.selectAll("path") | |
| .data(json.features.sort(function(a, b) { return a.properties.sort_key - b.properties.sort_key; })) | |
| .enter().append("path") | |
| .attr("class", function(d) { return d.properties.kind; }) | |
| .attr("d", tilePath); | |
| }); | |
| }); | |
| } | |
| function mousemoved() { | |
| info.text(formatLocation(projection.invert(d3.mouse(this)), zoom.scale())); | |
| } | |
| function matrix3d(scale, translate) { | |
| var k = scale / 256, r = scale % 1 ? Number : Math.round; | |
| return "matrix3d(" + [k, 0, 0, 0, 0, k, 0, 0, 0, 0, k, 0, r(translate[0] * scale), r(translate[1] * scale), 0, 1 ] + ")"; | |
| } | |
| function prefixMatch(p) { | |
| var i = -1, n = p.length, s = document.body.style; | |
| while (++i < n) if (p[i] + "Transform" in s) return "-" + p[i].toLowerCase() + "-"; | |
| return ""; | |
| } | |
| function formatLocation(p, k) { | |
| var format = d3.format("." + Math.floor(Math.log(k) / 2 - 2) + "f"); | |
| return (p[1] < 0 ? format(-p[1]) + "°S" : format(p[1]) + "°N") + " " | |
| + (p[0] < 0 ? format(-p[0]) + "°W" : format(p[0]) + "°E"); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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