(转)Openlayers 2.X加载天地图
http://blog.csdn.net/gisshixisheng/article/details/44621923
概述:
在前面的章节,讲到了Arcgis for js加载天地图,在本节讲述如何在Openlayers 2.X的版本中加载天地图,并添加自己的wms服务。
效果:

地图

影像
地形

去掉本地wms
实现:
1、天地图服务
在天地图的官方网站上,我们可以看到如下所示的:

页面上列出了我们可调用的图的url,网站地址为:http://www.tianditu.com/guide/index.html。
2、加载天地图
在openlayers中加载天地图可用OpenLayers.Layer.XYZ来实现,在此,我将之封装成了两个函数,getBaseLayer和getAnnoLayer,分别实现基础底图和标注图层,代码如下:
- function getBaseLayer(layername, layer){
- return new OpenLayers.Layer.XYZ(
- layername,
- [
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}"
- ],
- {
- isBaseLayer: true,
- displayInLayerSwitcher:true
- }
- );
- };
- function getAnnoLayer(layername, layer, visiable){
- return new OpenLayers.Layer.XYZ(
- layername,
- [
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}"
- ],
- {
- isBaseLayer: false,
- visibility:visiable,
- displayInLayerSwitcher:false
- }
- );
- };
调用方式为:
- var baseLayers = ["vec_c","img_c","ter_c"];
- var vecLayer = getBaseLayer("地图",baseLayers[0]);
- var imgLayer = getBaseLayer("影像",baseLayers[1]);
- var terLayer = getBaseLayer("地形",baseLayers[2]);
- var vecAnno = getAnnoLayer("地图标注", "cva_c", true);
完整代码如下:
- <!DOCTYPE html>
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
- <meta name="apple-mobile-web-app-capable" content="yes">
- <title>OpenLayers MapQuest Demo</title>
- <link rel="stylesheet" type="text/css" href="http://200.200.200.222/OpenLayers-2.12/theme/default/style.css"/>
- <style type="text/css">
- html, body, #map{
- padding:0;
- margin:0;
- height:100%;
- width:100%;
- }
- </style>
- <script type="text/javascript" src="http://200.200.200.222/OpenLayers-2.12/OpenLayers.js"></script>
- <script type="text/javascript">
- var map;
- function init(){
- function getBaseLayer(layername, layer){
- return new OpenLayers.Layer.XYZ(
- layername,
- [
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}"
- ],
- {
- isBaseLayer: true,
- displayInLayerSwitcher:true
- }
- );
- };
- function getAnnoLayer(layername, layer, visiable){
- return new OpenLayers.Layer.XYZ(
- layername,
- [
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}",
- "http://t0.tianditu.com/DataServer?T="+layer+"&X=${x}&Y=${y}&L=${z}"
- ],
- {
- isBaseLayer: false,
- visibility:visiable,
- displayInLayerSwitcher:false
- }
- );
- };
- var baseLayers = ["vec_c","img_c","ter_c"];
- var vecLayer = getBaseLayer("地图",baseLayers[0]);
- var imgLayer = getBaseLayer("影像",baseLayers[1]);
- var terLayer = getBaseLayer("地形",baseLayers[2]);
- var vecAnno = getAnnoLayer("地图标注", "cva_c", true);
- map = new OpenLayers.Map({
- div: "map",
- projection: "EPSG:4326",
- layers: [vecLayer,imgLayer,terLayer],
- numZoomLevels:20,
- center: [103.847, 36.0473],
- zoom: 4
- });
- map.addControl(new OpenLayers.Control.LayerSwitcher());
- map.addControl(new OpenLayers.Control.MousePosition());
- var wms = new OpenLayers.Layer.WMS(
- "省级行政区",
- "http://200.200.200.220:8080/geoserver/wms",
- {
- LAYERS: "pro",
- transparent:true
- },
- {
- singleTile: false,
- ratio: 1,
- isBaseLayer: false,
- visibility:true,
- yx : {'EPSG:4326' : true}
- }
- );
- map.addLayer(wms);
- map.addLayers([vecAnno]);
- }
- </script>
- </head>
- <body onload="init()">
- <div id="map"></div>
- </body>
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