分析---影像分析

留言
1.效果图

2.发布服务
  • 在Arccatalog中共享为影像服务
    在这里插入图片描述
  • 发布成功之后查看
  • 说明发布成功
3.引入模块

查询影像数据esri/tasks/ImageServiceIdentifyTask
参数：esri/tasks/ImageServiceIdentifyParameters esri/tasks/ImageServiceIdentifyResult
esri/tasks/ImageServiceIdentifyResult接收返回的参数

影像测量esri/tasks/ImageServiceMeasureTask
参数：esri/tasks/ImageServiceMeasureParameters

4.步骤
  1. 加载图层（不使用动态，使用影像服务）
  2. 创建影像分析和分析方法的参数对象
  3. 绑定事件，获取高程值并弹出
  4. 其中的掩模规则等可以封装为接口，方便以后使用
    5.代码
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<!DOCTYPE html>
<html>
  <head>
    <title>影像分析</title>
	
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=utf-8">
    <link rel="stylesheet" href="https://js.arcgis.com/3.28/esri/css/esri.css" />
    <script src="https://js.arcgis.com/3.28/"></script>
    <script  src="https://code.jquery.com/jquery-1.12.4.js"></script>
	<style>
        .MapClass{
            width:100%;
            height:700px;
            border:1px solid #000;
        }
    </style>
	<script>
		require(["esri/map","esri/layers/ArcGISImageServiceLayer","dojo/on",
		"dojo/dom","esri/toolbars/draw",
		"esri/tasks/ImageServiceIdentifyTask","esri/tasks/ImageServiceIdentifyParameters",
		"esri/symbols/SimpleLineSymbol","esri/graphic","esri/symbols/SimpleMarkerSymbol", "esri/symbols/SimpleFillSymbol",
		"esri/layers/MosaicRule",
		"dojo/domReady!"],function(Map,ArcGISImageServiceLayer,on,dom,Draw,ImageServiceIdentifyTask,
		ImageServiceIdentifyParameters,SimpleLineSymbol,
		Graphic,SimpleMarkerSymbol,SimpleFillSymbol,MosaicRule){
			var map=new Map("mapDiv")

			//注意这里是影像服务
			var layer=new ArcGISImageServiceLayer("http://localhost:6080/arcgis/rest/services/demo/ImageService_qingdao/ImageServer")
			map.addLayer(layer);
			//用于绘制点
			var toolbar =new Draw(map);
			
			//创建影像分析对象
			var task=new ImageServiceIdentifyTask("http://localhost:6080/arcgis/rest/services/demo/ImageService_qingdao/ImageServer");
			//创建影像分析参数对象
			var params=new ImageServiceIdentifyParameters();
			var lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASH, new dojo.Color([255, 0, 0]), 3);
            var marker= new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE,10, lineSymbol, new dojo.Color([255, 0, 0]));
            var fill= new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID, lineSymbol,  new dojo.Color([255, 0, 0]));
			//给绘制折线按钮绑定事件
			on(dom.byId("drawp"),"click",function(){
				toolbar.activate(Draw.POINT, {
                        showTooltips:true
                })
			})
			//给draw工具的绘制完成事件绑定函数
			on(toolbar,"draw-complete", function (result) {
				map.graphics.clear();
                var geometry=result.geometry;
				//给参数对象的几何属性赋值
				params.geometry =geometry;
				graphic= new Graphic(geometry, marker);
				map.graphics.add(graphic);
				toolbar.deactivate();
			
			})
			
			on(dom.byId("btn"),"click",function(){
				//设置掩膜规则
				var mosaicRule=new MosaicRule();
				mosaicRule.ascending=false;
				mosaicRule.method=MosaicRule.METHOD_CENTER
				params.mosaicRule=mosaicRule
				params.pixelSizeX=layer.pixelSizeX;
				params.pixelSizeY=layer.pixelSizeY;
				task.execute(params,function(result){
					//弹出改点的高程值
					alert(result.value)
				})
			})
			
		});
	</script>
  </head>
  
  <body>
    <div id="mapDiv" class="MapClass"></div>
	<button id="drawp">绘制点</button>
	<button id="btn">查询</button>
  </body>
</html>