Created
November 10, 2013 04:09
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Leaflet + D3 + Vector Tiles (via Nelson Minar)
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <title>D3 GeoJSON in Leaflet</title> | |
| <link href='http://api.tiles.mapbox.com/mapbox.js/v1.4.0/mapbox.css' rel='stylesheet' /> | |
| <!--[if lte IE 8]> | |
| <link href='http://api.tiles.mapbox.com/mapbox.js/v1.4.0/mapbox.ie.css' rel='stylesheet'> | |
| <![endif]--><style> | |
| html, body, #map { height: 100%;width:100%; background:#020B26;position:absolute;} | |
| body { padding: 0; margin: 0; } | |
| path { stroke-linejoin; round; stroke-linecap: round; fill: none} | |
| path.road { stroke : #3C80A9; fill : none ;} | |
| path.water { stroke:none; fill:#031536; } | |
| img { -webkit-filter: grayscale(100%) brightness(40%) contrast(150%);} | |
| </style> | |
| <body> | |
| <div id="map" class="dark"></div> | |
| <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 src="http://api.tiles.mapbox.com/mapbox.js/v1.4.0/mapbox.js"></script> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script src="http://d3js.org/topojson.v1.min.js"></script> | |
| <script> | |
| /* Experimental vector tile layer for Leaflet | |
| * Uses D3 to render TopoJSON. Derived from a GeoJSON thing that was | |
| * Originally by Ziggy Jonsson: http://bl.ocks.org/ZJONSSON/5602552 | |
| * Reworked by Nelson Minar: http://bl.ocks.org/NelsonMinar/5624141 | |
| */ | |
| L.TileLayer.d3_topoJSON = L.TileLayer.extend({ | |
| onAdd : function(map) { | |
| L.TileLayer.prototype.onAdd.call(this,map); | |
| this._path = d3.geo.path().projection(function(d) { | |
| var point = map.latLngToLayerPoint(new L.LatLng(d[1],d[0])); | |
| return [point.x,point.y]; | |
| }); | |
| this.on("tileunload",function(d) { | |
| if (d.tile.xhr) d.tile.xhr.abort(); | |
| if (d.tile.nodes) d.tile.nodes.remove(); | |
| d.tile.nodes = null; | |
| d.tile.xhr = null; | |
| }); | |
| }, | |
| _loadTile : function(tile,tilePoint) { | |
| var self = this; | |
| this._adjustTilePoint(tilePoint); | |
| if (!tile.nodes && !tile.xhr) { | |
| tile.xhr = d3.json(this.getTileUrl(tilePoint),function(error, tjData) { | |
| if (error) { | |
| console.log(error); | |
| } else { | |
| var geoJson = topojson.feature(tjData, tjData.objects[self.options.layerName]); | |
| tile.xhr = null; | |
| tile.nodes = d3.select(map._container).select("svg").append("g"); | |
| tile.nodes.selectAll("path") | |
| .data(geoJson.features).enter() | |
| .append("path") | |
| .attr("d", self._path) | |
| .attr("class", self.options.class) | |
| .attr("style", self.options.style); | |
| } | |
| }); | |
| } | |
| } | |
| }); | |
| map = L.map(map).setView([47.6062095, -122.332070], 12); | |
| map._initPathRoot(); | |
| // Add a fake GeoJSON line to coerce Leaflet into creating the <svg> tag that d3_geoJson needs | |
| new L.geoJson({"type": "LineString","coordinates":[[0,0],[0,0]]}).addTo(map); | |
| // Water Areas from OpenStreetMap | |
| new L.TileLayer.d3_topoJSON("http://tile.openstreetmap.us/vectiles-water-areas/{z}/{x}/{y}.topojson", { | |
| class: "water", | |
| layerName: "vectile", | |
| style: "" | |
| }).addTo(map); | |
| // Highways from OpenStreetMap | |
| var roadSizes = { | |
| "highway": "4px", | |
| "major_road": "1.8px", | |
| "minor_road": "1.2px", | |
| "rail": "0.8px", | |
| "path": "0.5px" | |
| }; | |
| var roadColors = { | |
| "highway": "url(#grad1)", | |
| "major_road": "url(#grad2)", | |
| "minor_road": "url(#grad3)", | |
| "rail": "url(#grad4)", | |
| "path": "url(#grad5)" | |
| }; | |
| new L.TileLayer.d3_topoJSON("http://tile.openstreetmap.us/vectiles-highroad/{z}/{x}/{y}.topojson", { | |
| class: "road", | |
| layerName: "vectile", | |
| style: function(d) { return "stroke-width: " + roadSizes[d.properties.kind] + "; stroke: " + roadColors[d.properties.kind]; } | |
| }).addTo(map); | |
| var topPane = map._createPane('leaflet-top-pane', map.getPanes().mapPane); | |
| var topLayer = new L.tileLayer('http://{s}.tile.stamen.com/toner-labels/{z}/{x}/{y}.png', { | |
| maxZoom: 17 | |
| }).addTo(map); | |
| topPane.appendChild(topLayer.getContainer()); | |
| topLayer.setZIndex(7); | |
| </script> | |
| </body> |
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