API/clusterLayer2.html

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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="../lib/css/Map5.min.css">
<script type="text/javascript" src="../lib/Map5.min.js"></script>
<script type="text/javascript" src="js/tianjin_gongchangValue.js"></script>
<style type="text/css">
	body{
		margin: 0px;
	}
</style>
<script type="text/javascript">
	// 地图变量
	var mapObj = null;
	function  init(){
		
		// 地图的范围
		var extent = new GeoBeans.Envelope(-180,-90,180,90);
		
		// 地图的容器为"mapDiv",地图名称"map"，地图范围，地图的空间参考，4326为经纬度
		mapObj = new GeoBeans.Map("mapDiv","map",extent,4326);
		if(mapObj == null){
			return;
		}
		
		// 定义一个QuadServer图层，作为底图，第一个参数为图层名称，第二个参数为QuadServer地址
		var layer = new GeoBeans.Layer.QSLayer("base","/QuadServer/maprequest?services=world_vector");

		// 添加图层
		mapObj.addLayer(layer);

		// 设置中心点
		var center = new GeoBeans.Geometry.Point(0,0);	
		mapObj.setCenter(center);

		// 设置级别
		mapObj.setLevel(3);	

		addFeatureLayer();

		// 绘图
		mapObj.draw();
	}


	function addFeatureLayer(){
		// 不是new 出来的
		var fields = [
			{
				name : "name",  // 字段名称
				type : "string"  // 字段类型
			},{
				name : "type",
				type : "int"
			},{
				name : "shape",
				type : "geometry"
			}
		];
		var geomType  = GeoBeans.Geometry.Type.POINT;
		var name = "testLayer";

		// 创建一个featureLayer
		// 第一个参数图层名称，第二个参数字段设置，第三个参数，图层的类型（点图层）
		var featureLayer = mapObj.createFeatureLayer(name,fields,geomType);
		
		// 添加图层
		mapObj.addLayer(featureLayer);

		var length = g_gongchangValue.length;
		for(var i = 0; i < length;++i){
			var v = g_gongchangValue[i];
			var name = v.name;
			var type = v.type;
			
			var wkt = v.shape;

			// 使用wkt转换为geometry
			var geometry = GeoBeans.Utility.createGeometryFromWKT(wkt);
			var id = "id_" + i;
			var values = [name,type,geometry];
			// 第一个参数要素的ID值，第二个参数要素的geometry，第三个参数要素字段值，与字段顺序一致
			featureLayer.addFeatureObj(id,geometry,values); 	
		}

		// 设定样式
		var style = createPointStyle();
		featureLayer.setStyle(style);
		mapObj.draw();
	}

	function createPointStyle(){
		var style = new GeoBeans.Style.FeatureStyle();
		var rule = new GeoBeans.Rule();
		var symbolizer = new GeoBeans.Symbolizer.PointSymbolizer();
		symbolizer.size = 1;
		symbolizer.fill.color.set(255, 0, 0,1);
		symbolizer.stroke = null;
		rule.symbolizer = symbolizer;
		style.addRule(rule);
		return style;
	}


	function addChart(){
		// 1、设置图层名称
		var layerName = "chart";

		// 2、选取底图名称
		var baseLayerName = "testLayer";

		// 3、定义点聚合图
		var layer = new GeoBeans.Layer.ClusterLayer(layerName,baseLayerName);

		// 4、添加图层
		mapObj.addLayer(layer);

		// 5、绘图
		mapObj.draw();
	}

	function setLayerVisible(){
		var layer = mapObj.getLayer("testLayer");
		if(layer.visible){
			layer.setVisiable(false);
		}else{
			layer.setVisiable(true);
		}
		mapObj.draw();
	}

	function removeChartLayer(){

		// 1、根据名称删除图层
		mapObj.removeLayer("chart");

		// 2、绘图
		mapObj.draw();
	}

</script>
<title>Map5 -- 点聚合图</title>
<body onload="init()">
	<!-- mapDiv 为初始化地图的容器，给定高度和宽度，并指定定位方式为绝对定位 -->
	<div id="mapDiv" style="height:800px;width:100%;position:absolute;top:80px;">
	</div>
	<button onclick="addChart()">点聚合图(天津市工厂数据)</button>
	<button onclick="setLayerVisible()">隐藏/显示原始图</button>
	<button onclick="removeChartLayer()">删除点聚合图</button>
</body>
	