利用ArcGIS JavaScript API加载高德在线地图的扩展
/**
* Created by WanderGIS on 2015/7/15.
*/
define(["dojo/_base/declare",
"esri/geometry/Extent",
"esri/SpatialReference",
"esri/geometry/Point",
"esri/layers/TileInfo",
"esri/layers/TiledMapServiceLayer"], function (declare, Extent, SpatialReference, Point, TileInfo, TiledMapServiceLayer) {
return declare("gaodeLayer", TiledMapServiceLayer, {
layertype: "road",//图层类型
constructor: function (args) {
this.spatialReference = new SpatialReference({
wkid: 3857
});
declare.safeMixin(this, args);
this.fullExtent = new Extent(-20037508.342787, -20037508.342787, 20037508.342787, 20037508.342787, this.spatialReference);
this.initialExtent = this.fullExtent;
this.tileInfo = new TileInfo({
"cols": 256,
"rows": 256,
"compressionQuality": 0,
"origin": new Point(-20037508.342787, 20037508.342787, this.spatialReference),
"spatialReference": this.spatialReference,
"lods": [{
"level": 0,
"resolution": 156543.033928,
"scale": 591657527.591555
}, {
"level": 1,
"resolution": 78271.5169639999,
"scale": 295828763.795777
}, {
"level": 2,
"resolution": 39135.7584820001,
"scale": 147914381.897889
}, {
"level": 3,
"resolution": 19567.8792409999,
"scale": 73957190.948944
}, {
"level": 4,
"resolution": 9783.93962049996,
"scale": 36978595.474472
}, {
"level": 5,
"resolution": 4891.96981024998,
"scale": 18489297.737236
}, {
"level": 6,
"resolution": 2445.98490512499,
"scale": 9244648.868618
}, {
"level": 7,
"resolution": 1222.99245256249,
"scale": 4622324.434309
}, {
"level": 8,
"resolution": 611.49622628138,
"scale": 2311162.217155
}, {
"level": 9,
"resolution": 305.748113140558,
"scale": 1155581.108577
}, {
"level": 10,
"resolution": 152.874056570411,
"scale": 577790.554289
}, {
"level": 11,
"resolution": 76.4370282850732,
"scale": 288895.277144
}, {
"level": 12,
"resolution": 38.2185141425366,
"scale": 144447.638572
}, {
"level": 13,
"resolution": 19.1092570712683,
"scale": 72223.819286
}, {
"level": 14,
"resolution": 9.55462853563415,
"scale": 36111.909643
}, {
"level": 15,"resolution":4.77731426794937,"scale":18055.954822},{"level":16,"resolution":2.38865713397468,"scale":9027.977411},{"level":17,"resolution":1.19432856685505,"scale":4513.988705},{"level":18,"resolution":0.597164283559817,"scale":2256.994353},{"level":19,"resolution":0.298582141647617,"scale":1128.497176}]});this.loaded =true;this.onLoad(this);},/**
* 根据不同的layType返回不同的图层
* @param level
* @param row
* @param col
* @returns {string}
*/
getTileUrl:function(level, row, col){var url ="";switch(this.layertype){case"road":
url ='http://webrd0'+(col %4+1)+'.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x='+ col +'&y='+ row +'&z='+ level;break;case"st":
url ='http://webst0'+(col %4+1)+'.is.autonavi.com/appmaptile?style=6&x='+ col +'&y='+ row +'&z='+ level;break;case"label":
url ='http://webst0'+(col %4+1)+'.is.autonavi.com/appmaptile?style=8&x='+ col +'&y='+ row +'&z='+ level;break;default:
url ='http://webrd0'+(col %4+1)+'.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x='+ col +'&y='+ row +'&z='+ level;break;}return url;}});});使用方法
1、 在api引入之前配置dojoConfig
<script type="text/javascript">
var dojoConfig = {
async: true,
parseOnLoad: true,
packages: [{
name: "extLayers",
location: location.pathname.replace(/\/[^/]*$/, '') + '/extLayers'
}]
};
</script>2、然后在代码中可以如下方式构造layer
require(["esri/map", "extLayers/gaodeLayer", "dojo/domReady!"], function (Map, gaodeLayer) {
var map = new Map("map", {
center: [116, 28],
zoom: 5
});
var baselayer = new gaodeLayer();//默认加载矢量 new gaodeLayer({layertype:"road"});也可以
//var baselayer = new gaodeLayer({layertype: "st"});//加载卫星图
//var baselayer = new gaodeLayer({layertype: "label"});//加载标注图
map.addLayer(baselayer);//添加高德地图到map容器
});