程序喵描述:此示例显示了如何读取地图和图层属性和报告的信息返回给用户
在线演示：http://help.arcgis.com/en/webapi/javascript/arcgis/samples/map_showproperties/index.html
引用联接：http://help.arcgis.com/en/webapi/javascript/arcgis/help/jssamples_start.htm
代码分析如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//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,IE=9" />
<!--The viewport meta tag is used to improve the presentation and behavior of the samples on iOS devices-->
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no"/>
<title>ArcGIS JavaScript API Map Layer</title>
<link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/3.2/js/dojo/dijit/themes/claro/claro.css">
<link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/3.2/js/esri/css/esri.css" />
<style>
html, body { height: 98%; width: 98%; margin: 0; padding: 5px; }
</style>
<script type="text/javascript">var djConfig = {parseOnLoad: true};</script>
<script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=3.2"></script>
<script type="text/javascript">
//导入包
dojo.require("esri.map");
dojo.require("dijit.layout.BorderContainer");
dojo.require("dijit.layout.ContentPane");
var map, basemap, transportation, census;
function init() {
map = new esri.Map("map");
basemap = new esri.layers.ArcGISTiledMapServiceLayer("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/TaxParcel/AssessorsBasemap/MapServer");
map.addLayer(basemap);
transportation = new esri.layers.ArcGISTiledMapServiceLayer("http://server.arcgisonline.com/ArcGIS/rest/services/Reference/ESRI_Transportation_World_2D/MapServer", {"id":"agoreference", "opacity":0.5});
map.addLayer(transportation);
census = new esri.layers.ArcGISDynamicMapServiceLayer("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer", {"id":"census","opacity":0.5});
map.addLayer(census);
dojo.connect(map, 'onLoad', function(theMap) {
// 窗格中显示详细的地图信息
// 层细节
var content = "";
var layerInfo = []; // 图层数组，用于显示
dojo.forEach(map.layerIds,function(id){ // 遍历 TiledMapServiceLayers 和 DynamicMapServiceLayers 添加到地图中的数组
var layer = map.getLayer(id);
layerInfo.push("id: " + layer.id + " visible(): " + layer.visible + " opacity(透明度): " + layer.opacity + "<br />");
});
var sr = "Spatial Reference(空间参考): " + map.spatialReference.wkid + "<br />";
var size = "Width(宽): " + map.width + " Height(高): " + map.height + "<br />";
// 获得尺度细节
var tileInfo = basemap.tileInfo; //包含ArcGISTiledMapServiceLayer的切片方案信息
var scales = [];
dojo.forEach(tileInfo.lods,function(lod){
var level = lod.level;
var scale = lod.scale;
resolution = lod.resolution;
scales.push( "level(深度): " + level + " scale(刻度): " + scale + " resolution(分辨率): " + resolution + "<br />");
});
dojo.byId('rightPane').innerHTML = "<b>Layers(层):</b><br />" + layerInfo.join("") +
"<b>Spatial Reference(空间参考):</b> <br /> " + sr +
"<b>Map Size(地图尺寸):</b> <br />" + size +
"<b>Scales(刻度):</b><br />" + scales.join("");
//当浏览器调整，调整地图的大小
dojo.connect(dijit.byId('map'), 'resize', map,map.resize);
});
}
dojo.addOnLoad(init); // 初始化加载
</script>
</head>
<body class="claro">
<div id="content" dojotype="dijit.layout.BorderContainer" design="headline" gutters="true" style="width: 100%; height: 100%; margin: 0;">
<div id="map" dojotype="dijit.layout.ContentPane" region="center" style="overflow:hidden;">
</div>
<div id="rightPane" style="height:200px;" dojotype="dijit.layout.ContentPane" region="bottom">
</div>
</div>
</body>
</html>效果如下：
未经允许请勿转载：程序喵 » ArcGIS For JavaScript API Show map properties —— 显示地图信息