等值线

Loca 3D 等值线图层，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>等值线</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/maps?v=1.4.15&key=您申请的key值&"></script>
    <script src="//webapi.amap.com/loca?v=1.3.2&key=您申请的key值"></script>
    <script src="//a.amap.com/insight/static/distrct.js"></script>
    <script>
        var map = new AMap.Map('container', {
            mapStyle: 'amap://styles/db9efe6a1745ac24b7269b862f359536',
            viewMode: '3D',
            features: ['bg', 'road'],
            zoom: 9.6,
            pitch: 56
        });

        var contourLayer = new Loca.ContourLayer({
            shape: 'isoline',
            map: map
        });

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

        contourLayer.setOptions({
            smoothNumber: 3,
            threshold: 3,
            interpolation: {
                step: 300,
                effectRadius: 800,
            },
            style: {
                height: 5 * 1E4,
                color: ["#0c2c84", "#225ea8", "#1d91c0", "#41b6c4", "#7fcdbb", "#c7e9b4", "#ffffcc"]
            }
        });

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

</html>

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