3D 等高线

Loca 3D 等高线图层，通过 shape 设置为 'isoline' 可绘制为等高线。

源代码编辑器

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>等高线</title>
    <style>
        html,
        body,
        #container {
            margin: 0;
            padding: 0;
            width: 100%;
            height: 100%;
        }
    </style>
</head>
<body>
<div id="container" class="container"></div>
<script src="//webapi.amap.com/loca?v=1.2.0&key=您申请的key值"></script>
<script src="//a.amap.com/insight/static/distrct.js"></script>
<script>

    var map = Loca.create('container', {
        mapStyle: 'amap://styles/midnight',
        zoom: 4,
        pitch: 60,
    });

    var contourLayer = Loca.visualLayer({
        type: 'contour',
        shape: 'isoline',
        container: map
    });

    contourLayer.setData(districtData, {
        lnglat: 'lnglat',
        value: 'count'
    });

    contourLayer.setOptions({
        smoothNumber: 3,
        threshold: 3,
        interpolation: {
            step: 300,
            effectRadius: 1000,
        },
        style: {
            height: 8 * 1E4
        }
    });

    contourLayer.render();
</script>
</body>
</html>

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