02 创建一个三维地图
三维地图的创建跟上文中的创建二维地图差不太多,只是所使用的地图视角不同而已,下面是最终效果图:
接下来我们看看具体的实现过程:
1 创建基本的HTML页面结构,创建div,然后设置基本样式,如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Intro to SceneView - Create a 3D map</title>
<style>
html, body, #viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
2 引入所需的开发包,在此处也只是需要一个样式文件和基础的js文件,如下:
<link rel="stylesheet" href="https://js.arcgis.com/4.9/esri/css/main.css">
<script src="https://js.arcgis.com/4.9/"></script>
3 加载所需的模块,然后实例化地图:
<script>
require([
"esri/Map",
"esri/views/SceneView"
], function(Map, SceneView){
var map = new Map({
basemap: "osm",
ground: "world-elevation"
});
});
</script>
4 创建地图视角,注意,在此处的地图视角不再是MapView,而是SceneView,所以大家一定要注意:
var view = new SceneView({
container: "viewDiv",
map: map, // 绑定地图
scale: 30000000, // 设定比例尺 1:30,000,000
center: [104.071469,30.662036] // 视角中心
});
5 至此,一个三维地图创建完成,完整代码如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Intro to SceneView - Create a 3D map</title>
<style>
html, body, #viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
<link rel="stylesheet" href="https://js.arcgis.com/4.9/esri/css/main.css">
<script src="https://js.arcgis.com/4.9/"></script>
<script>
require([
"esri/Map",
"esri/views/SceneView"
], function(Map, SceneView){
var map = new Map({
basemap: "osm",
ground: "world-elevation"
});
var view = new SceneView({
container: "viewDiv",
map: map, // 绑定地图
scale: 30000000, // 设定比例尺 1:30,000,000
center: [104.071469,30.662036] // 视角中心
});
});
</script>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
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