arcgis api for javascipt 加载天地图百度地图
Posted 疯子加天才
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写在前面的话：
1.百度地图是自己定义的坐标系统，wkid=102100.百度地图数据是加密的产物。下文将附上百度坐标与WGS84，谷歌等坐标系统转换方法（地理-地理），此方法并未亲测，据说准
2.百度地图可以直接加载经纬度坐标
3.百度地图如果加载的arcgis api中会出现坐标偏移，1.中已经解决了地理坐标转换，那么找到百度投影-地理坐标的转换方式，则arcgis就可以直接无偏加载了，网上很多方法，但是亲测不行。
4.天地图不是涉密数据，根据本文提供的类库,arcgis api for js可以直接加载。但是数据有略微的偏移
天地图的切片地图可以通过esri.layers.TiledMapServiceLayer来加载，在此将之进行了一定的封装，如下：
1、切片线划图——TDTLayer.js
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define(["dojo/_base/declare", "esri/layers/tiled"], function (declare) { return declare(esri.layers.TiledMapServiceLayer, { constructor: function () { this.spatialReference = new esri.SpatialReference({ wkid: 4326 }); this.initialExtent = (this.fullExtent = new esri.geometry.Extent(-180.0, -90.0, 180.0, 90.0, this.spatialReference)); this.tileInfo = new esri.layers.TileInfo({ "rows": 256, "cols": 256, "compressionQuality": 0, "origin": { "x": -180, "y": 90 }, "spatialReference": { "wkid": 4326 }, "lods": [ { "level": 2, "resolution": 0.3515625, "scale": 147748796.52937502 }, { "level": 3, "resolution": 0.17578125, "scale": 73874398.264687508 }, { "level": 4, "resolution": 0.087890625, "scale": 36937199.132343754 }, { "level": 5, "resolution": 0.0439453125, "scale": 18468599.566171877 }, { "level": 6, "resolution": 0.02197265625, "scale": 9234299.7830859385 }, { "level": 7, "resolution": 0.010986328125, "scale": 4617149.8915429693 }, { "level": 8, "resolution": 0.0054931640625, "scale": 2308574.9457714846 }, { "level": 9, "resolution": 0.00274658203125, "scale": 1154287.4728857423 }, { "level": 10, "resolution": 0.001373291015625, "scale": 577143.73644287116 }, { "level": 11, "resolution": 0.0006866455078125, "scale": 288571.86822143558 }, { "level": 12, "resolution": 0.00034332275390625, "scale": 144285.93411071779 }, { "level": 13, "resolution": 0.000171661376953125, "scale": 72142.967055358895 }, { "level": 14, "resolution": 8.58306884765625e-005, "scale": 36071.483527679447 }, { "level": 15, "resolution": 4.291534423828125e-005, "scale": 18035.741763839724 }, { "level": 16, "resolution": 2.1457672119140625e-005, "scale": 9017.8708819198619 }, { "level": 17, "resolution": 1.0728836059570313e-005, "scale": 4508.9354409599309 }, { "level": 18, "resolution": 5.3644180297851563e-006, "scale": 2254.4677204799655 } ] }); this.loaded = true; this.onLoad(this); }, getTileUrl: function (level, row, col) { return "http://t" + col % 8 + ".tianditu.cn/vec_c/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=vec&STYLE=default&TILEMATRIXSET=c&TILEMATRIX=" + level + "&TILEROW=" + row + "&TILECOL=" + col + "&FORMAT=tiles"; } }); }); |
2、切片标注——TDTAnnoLayer.js
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define(["dojo/_base/declare", "esri/layers/tiled"], function (declare) { return declare(esri.layers.TiledMapServiceLayer, { constructor: function () { this.spatialReference = new esri.SpatialReference({ wkid: 4326 }); this.initialExtent = (this.fullExtent = new esri.geometry.Extent(-180.0, -90.0, 180.0, 90.0, this.spatialReference)); this.tileInfo = new esri.layers.TileInfo({ "rows": 256, "cols": 256, "compressionQuality": 0, "origin": { "x": -180, "y": 90 }, "spatialReference": { "wkid": 4326 }, "lods": [ { "level": 2, "resolution": 0.3515625, "scale": 147748796.52937502 }, { "level": 3, "resolution": 0.17578125, "scale": 73874398.264687508 }, { "level": 4, "resolution": 0.087890625, "scale": 36937199.132343754 }, { "level": 5, "resolution": 0.0439453125, "scale": 18468599.566171877 }, { "level": 6, "resolution": 0.02197265625, "scale": 9234299.7830859385 }, { "level": 7, "resolution": 0.010986328125, "scale": 4617149.8915429693 }, { "level": 8, "resolution": 0.0054931640625, "scale": 2308574.9457714846 }, { "level": 9, "resolution": 0.00274658203125, "scale": 1154287.4728857423 }, { "level": 10, "resolution": 0.001373291015625, "scale": 577143.73644287116 }, { "level": 11, "resolution": 0.0006866455078125, "scale": 288571.86822143558 }, { "level": 12, "resolution": 0.00034332275390625, "scale": 144285.93411071779 }, { "level": 13, "resolution": 0.000171661376953125, "scale": 72142.967055358895 }, { "level": 14, "resolution": 8.58306884765625e-005, "scale": 36071.483527679447 }, { "level": 15, "resolution": 4.291534423828125e-005, "scale": 18035.741763839724 }, { "level": 16, "resolution": 2.1457672119140625e-005, "scale": 9017.8708819198619 }, { "level": 17, "resolution": 1.0728836059570313e-005, "scale": 4508.9354409599309 }, { "level": 18, "resolution": 5.3644180297851563e-006, "scale": 2254.4677204799655 } ] }); this.loaded = true; this.onLoad(this); }, getTileUrl: function (level, row, col) { return "http://t" + row % 8 + ".tianditu.cn/cva_c/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=cva&STYLE=default&TILEMATRIXSET=c&TILEMATRIX=" + level + "&TILEROW=" + row + "&TILECOL=" + col + "&FORMAT=tiles"; } }); }); |
封装好之后就可以在页面调用了，调用的时候需要导入这些自定义的图层，导入方式为：
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dojoConfig = { parseOnLoad: true, packages: [{ name: \'tdlib\', location: this.location.pathname.replace(/\\/[^/]+$/, "")+"/js/tdlib" }] };</script><script src="http://localhost/arcgis_js_api/library/3.9/3.9/init.js"></script><script> require(["tdlib/TDTLayer", "tdlib/TDTAnnoLayer"], function (TDTLayer, TDTAnnoLayer ){ var basemap = new TDTLayer(); map.addLayer(basemap); var annolayer = new TDTAnnoLayer(); map.addLayer(annolayer); });</script><br><br><span style="color: rgb(128, 0, 0);">完整调用代码：<br></span> |
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<span style="color: rgb(128, 0, 0);"><br><br><br><!DOCTYPE html><br><html><br><head><br> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><br> <title>Baidu Map</title><br> <link rel="stylesheet" href="https://js.arcgis.com/3.17/esri/css/esri.css"><br> <style><br> html, body, #map {<br> height: 100%;<br> margin: 0;<br> padding: 0;<br> }<br> .base-map-ano{<br> position: absolute;<br> right: 0pt;<br> top:18pt;<br> background: #e6edf1;<br> border: #96aed1 1px solid;<br> padding: 4px 5px;<br> padding-left: 0px;<br> padding-top: 0px;<br> display: none;<br> font-weight: normal;<br> }<br> .base-map{<br> position: absolute;<br> right: 15pt;<br> top:15pt;<br> background: #f0f0f0;<br> border: #96aed1 1px solid;<br> width: auto;<br> height: auto;<br> z-index: 99;<br> font:normal 11px "宋体",Arial;<br> color:#868686;<br> }<br> .base-map-switch{<br> padding: 4px 8px;<br> float: left;<br> }<br> .base-map-switch-active{<br> background:#e6edf1;<br> font-weight: bold;<br> color: #4d4d4d;<br> }<br> .base-map-switch:hover{<br> cursor: pointer;<br> }<br> .base-map-switch-center{<br> border: 1px #96aed1 solid;<br> border-top:none;<br> border-bottom:none;<br> }<br> </style><br> <script type="text/javascript"><br> dojoConfig = {<br> parseO |