Forking mbostock's vector tiles gist/block, but for London and with motorways in blue.
I'm not quite sure what else I'm going to do with this yet. Hack in onHashChange? Realise that polymaps is better for this stuff?
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| margin: 0; | |
| } | |
| .map { | |
| position: relative; | |
| overflow: hidden; | |
| } | |
| .layer { | |
| position: absolute; | |
| } | |
| .tile { | |
| position: absolute; | |
| width: 256px; | |
| height: 256px; | |
| } | |
| .tile path { | |
| fill: none; | |
| stroke: #ccc; | |
| stroke-linejoin: round; | |
| stroke-linecap: round; | |
| } | |
| .tile .major_road { stroke: #eeeeee; } | |
| .tile .minor_road { stroke: #f6f6f6; } | |
| .tile .highway { stroke: #0079c1; stroke-width: 1.5px; } | |
| .tile .rail { stroke: #999; } | |
| .info { | |
| position: absolute; | |
| bottom: 10px; | |
| left: 10px; | |
| font-family: "helvetica neue"; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/d3.geo.tile.v0.min.js"></script> | |
| <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 << 21) / 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 << 17, 1 << 23]) | |
| .translate(projection([-0.49416 , 51.4994]).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> |
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