添加要素图层到地图
这个示例的地图显示了沃伦威尔逊学院树木的碳储量，实现方法是添加 FeatureLayer 到地图。默认情况下，FeatureLayer 使用 feature service 定义的渲染器。你可以通过设置 FeatureLayer 的 renderer 属性来自定义渲染器。
程序完整源代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<title>FeatureLayer - 4.5</title>
<link rel="stylesheet" href="https://js.arcgis.com/4.5/esri/css/main.css">
<script src="https://js.arcgis.com/4.5/"></script>
<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
<script>
require([
"esri/Map",
"esri/views/MapView",
"esri/layers/FeatureLayer",
"dojo/domReady!"
],
function(
Map, MapView,
FeatureLayer
) {
var map = new Map({
basemap: "hybrid"
});
var view = new MapView({
container: "viewDiv",
map: map,
extent: {
xmin: -9177811,
ymin: 4247000,
xmax: -9176791,
ymax: 4247784,
spatialReference: 102100
}
});
/********************
* 添加要素图层
********************/
var featureLayer = new FeatureLayer({
url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Landscape_Trees/FeatureServer/0"
});
map.add(featureLayer);
});
</script>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
程序运行效果：
沙箱地址：（完）