炫码科技-高德地图 LOCA 数据可视化 API 2.0——青岛拥堵指数差值热力地图

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>青岛分布热力图</title>
    <style>
        html,
        body,
        #map {
            width: 100%;
            height: 100%;
            margin: 0;
            padding: 0;
        }

        .demo-title {
            position: absolute;
            top: 50px;
            left: 50px;
            z-index: 1;
        }

        h1 {
            margin: 0;
            color: #abb3bb;
        }

        h3 {
            font-weight: normal;
            margin-top: 5px;
            color: #aaa;
        }
    </style>
</head>

<body>

    <div class="demo-title">
        <h1>3D热力—青岛交通拥堵指数</h1>
        <h3>青岛热力指数，使用差值的形式区分不同热度</h3>
    </div>
    <div id="map"></div>

    <script
        src="https://webapi.amap.com/maps?v=2.0&key=您申请的key值&plugin=AMap.Scale,AMap.ToolBar"></script>
    <script src="https://webapi.amap.com/loca?v=2.0.0&key=您申请的key值"></script>
    <script>
        var map = new AMap.Map('map', {
            zoom: 9.66,
            center: [120.209524,36.305702],
            showLabel: false,
            mapStyle: 'amap://styles/45311ae996a8bea0da10ad5151f72979',
            viewMode: '3D',
        });

        var loca = new Loca.Container({
            map,
        });

        var geo = new Loca.GeoJSONSource({
            url: 'https://a.amap.com/Loca/static/loca-v2/demos/mock_data/tsing.json',
        });

        var heatmap = new Loca.HeatMapLayer({
            // loca,
            zIndex: 10,
            opacity: 1,
            visible: true,
            zooms: [2, 22],
        });

        heatmap.setSource(geo, {
            radius: 9000,
            unit: 'meter',
            height: 8000,
            difference: true,
            gradient: {
                1: '#FF4C2F',
                0.8: '#FAA53F',
                0.6: '#FFF100',
                0.5: '#7DF675',
                0.4: '#5CE182',
                0.2: '#29CF6F',
            },
            value: function (index, feature) {
                return feature.properties.count;
            },
            opacity: [0, 1],
            heightBezier: [0, 0.53, 0.37, 0.98]
        });
        loca.add(heatmap);

        map.on('click', () => {
            heatmap.addAnimate({
                key: 'radius',
                value: [0, 1],
                random: true,
                transform: 1000,
                delay: 6000,
                easing: 'BounceOut' //https://redmed.github.io/chito/example/easing.html
            });
        });

  
    </script>
</body>

</html>

点此访问青岛拥堵指数差值热力地图

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