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GeoJSON Leaflet Tile Layer
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| // Load tiled GeoJSON and merge into single geojson hash. | |
| // Requires jQuery for jsonp. | |
| L.TileLayer.GeoJSON = L.TileLayer.extend({ | |
| _geojson: {"type":"FeatureCollection","features":[]}, | |
| _requests: [], | |
| geojson: function() { | |
| if (this._geojson.features.length) return this._geojson; | |
| for (k in this._tiles) { | |
| var t = this._tiles[k]; | |
| if (t.geojson && t.geojson.features) { | |
| this._geojson.features = | |
| this._geojson.features.concat(t.geojson.features); | |
| } | |
| } | |
| return this._geojson; | |
| }, | |
| _addTile: function(tilePoint, container) { | |
| var tile = { geojson: null }; | |
| this._tiles[tilePoint.x + ':' + tilePoint.y] = tile; | |
| this._loadTile(tile, tilePoint); | |
| }, | |
| _loadTile: function (tile, tilePoint) { | |
| var layer = this; | |
| this._requests.push($.ajax({ | |
| url: this.getTileUrl(tilePoint), | |
| dataType: 'json', | |
| success: function(geojson) { | |
| tile.geojson = geojson; | |
| layer._geojson.features = []; | |
| layer._tileLoaded(); | |
| }, | |
| error: function() { | |
| layer._tileLoaded(); | |
| } | |
| })); | |
| }, | |
| _resetCallback: function() { | |
| this._geojson.features = []; | |
| L.TileLayer.prototype._resetCallback.apply(this, arguments); | |
| for (i in this._requests) { | |
| this._requests[i].abort(); | |
| } | |
| this._requests = []; | |
| }, | |
| _update: function() { | |
| if (this._map._panTransition && this._map._panTransition._inProgress) { return; } | |
| if (this._tilesToLoad < 0) this._tilesToLoad = 0; | |
| L.TileLayer.prototype._update.apply(this, arguments); | |
| } | |
| }); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Leaflet GeoJSON tile layer example</title> | |
| <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.4.5/leaflet.css" /> | |
| <!--[if lte IE 8]> | |
| <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.4.5/leaflet.ie.css" /> | |
| <![endif]--> | |
| <script src="http://cdn.leafletjs.com/leaflet-0.4.5/leaflet.js"></script> | |
| <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script> | |
| <script src="geojson-tiles.js"></script> | |
| <style type="text/css"> | |
| html, body, map { | |
| margin: 0; | |
| padding: 0; | |
| width: 100%; | |
| height: 100%; | |
| } | |
| .geojson-dialog-hover { | |
| background: #EEE; | |
| border: 1px solid #DDD; | |
| border-radius: 5px; | |
| color: #333; | |
| font-family: sans-serif; | |
| font-size: small; | |
| margin: 0; | |
| padding: 3px; | |
| } | |
| .geojson-dialog-hover p { | |
| margin: 0 0 5px 0; | |
| padding: 0; | |
| } | |
| .geojson-feature-property-name { | |
| font-weight: bold; | |
| margin-right: 5px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map" style="width: 100%; height: 100%; border: 1px solid #ccc"></div> | |
| <script type="text/javascript"> | |
| var map = new L.Map('map'), | |
| cloudmadeUrl = 'http://{s}.tile.cloudmade.com/1a1b06b230af4efdbb989ea99e9841af/997/256/{z}/{x}/{y}.png', | |
| cloudmadeAttribution = 'Map data © 2011 OpenStreetMap contributors, Imagery © 2011 CloudMade'; | |
| map.setView(new L.LatLng(38.617, -100.261), 5); | |
| var baseLayer = new L.TileLayer(cloudmadeUrl, { attribution: cloudmadeAttribution}); | |
| map.addLayer(baseLayer); | |
| var geojsonURL = 'http://polymaps.appspot.com/county/{z}/{x}/{y}.json'; | |
| var geojsonLayer = window.g = new L.GeoJSON(null, { | |
| /* style of GeoJSON feature */ | |
| style: { | |
| "color": "#1B1", | |
| "fillColor": "#1B1", | |
| "weight": 0.7, | |
| "opacity": 0.3, | |
| "fillOpacity": 0.1 | |
| }, | |
| /* style of GeoJSON feature when hovered */ | |
| hoverStyle: { | |
| "fillOpacity": 0.4 | |
| }, | |
| hoverOffset: new L.Point(30,-16), | |
| onEachFeature: function (feature, layer) { | |
| layer.on('mouseover', function() { | |
| layer.setStyle({"fillOpacity": 0.4}); | |
| }); | |
| layer.on('mouseout', function() { | |
| layer.setStyle({"fillOpacity": 0.1}); | |
| }); | |
| } | |
| }); | |
| map.addLayer(geojsonLayer); | |
| // Add GeoJSON loader layer. | |
| var geojson = new L.TileLayer.GeoJSON(geojsonURL); | |
| geojson.on('load', function() { | |
| geojsonLayer.clearLayers().addData(geojson.geojson()); | |
| }); | |
| map.addLayer(geojson); | |
| </script> | |
| </body> | |
| </html> |
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