描述
這個示例表現如何加兩個動態地圖到一個地圖。動態服務按用戶縮放或平移服務器每次繪制的地圖， ArcGISDynamicMapServiceLayer表示ArcGIS JavaScript API動態地圖服務。不像切片地圖服務，動態地圖服務沒有一個預先渲染的圖片切片的 cache。由於這個原因，動態地圖服務比切片地圖服務慢，但是對顯示常常修改的和實時的數據是很有用的。
圖層順序由 map.addLayer方法調用的順序決定。第一個被增加的圖層被放置在下方。后來的圖層放置在上面。在這個示例中，USA人口普查的國家圖層被放置在堪薩斯州石油和天然氣圖層上方。
注意圖層使用setOpacity方法設置半透明的。
dynlayer2.setOpacity(0.5);
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <meta http-equiv="X-UA-Compatible" content="IE=7" /> <title>TwoDynamicMapServiceLayers</title> <link rel="stylesheet" type="text/css" href="styles.css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/1.6/js/dojo/dijit/themes/tundra/tundra.css"> <script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=1.6"></script> <script type="text/javascript"> dojo.require("esri.map"); function init(){ var map = new esri.Map("map"); //非緩存地圖服務URL,多個動態地圖層序由加載順序決定，先添加的放在下面 var dynamicMapServiceLayer = new esri.layers.ArcGISDynamicMapServiceLayer( "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Petroleum/KGS_OilGasFields_Kansas/MapServer" ); map.addLayer(dynamicMapServiceLayer); var dynamicMapServiceLayer2 = new esri.layers.ArcGISDynamicMapServiceLayer( "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer",{"opacity":0.5} //"http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer" ); map.addLayer(dynamicMapServiceLayer2); } dojo.addOnLoad(init); </script> </head> <body class="tundra"> <div id="map" style="width:900px;height:600px;border:1px solid #000"></div> Creates a map adds two ArcGISDynamicMapServiceLayers.<br> Map navigation using mouse:利用鼠標進行地圖導航 <ul> <li>Drag to pan</li> <li>SHIFT + Click to recenter</li> <li>SHIFT + Drag to zoom in</li> <li>SHIFT + CTRL + Drag to zoom out</li> <li>Mouse Scroll Forward to zoom in</li> <li>Mouse Scroll Backward to zoom out</li> <li>Use Arrow keys to pan</li> <li>+ key to zoom in a level</li> <li>- key to zoom out a level</li> <li>Double Click to Center and Zoom in</li> </ul> </body> </html>