地震規模圖 (Heatmap)

範例展示

原始碼

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>地震規模圖 (Heatmap) - Map8 Platform Documentation</title>
    <link rel="stylesheet" href="https://api.map8.zone/css/gomp.css?key=[YOUR_KEY_HERE]" />
    <style>
        #map{
            height: 400px;
            width: 100%;
        }
    </style>
</head>
<body>
    <div id="map"></div>

    <script type="text/javascript" src="https://api.map8.zone/maps/js/gomp.js?key=[YOUR_KEY_HERE]"></script>
    <script type="text/javascript">
        gomp.accessToken = '[YOUR_KEY_HERE]';
        var map = new gomp.Map({
            container: 'map', // 地圖容器 ID
            style: 'https://api.map8.zone/styles/go-life-maps-tw-style-std/style.json', // 地圖樣式檔案位置
            maxBounds: [[105, 15], [138.45858, 33.4]], // 台灣地圖區域
            center: [120.973882, 23.6], // 初始中心座標，格式為 [lng, lat]
            zoom: 6, // 初始 ZOOM LEVEL; [0-20, 0 為最小 (遠), 20 ;最大 (近)]
            minZoom: 6, // 限制地圖可縮放之最小等級, 可省略, [0-19.99]
            maxZoom: 19.99, // 限制地圖可縮放之最大等級, 可省略 [0-19.99]
            attributionControl: false
        }).addControl(new gomp.AttributionControl({
            compact: false
        }));
        map.addControl(new gomp.NavigationControl());

        map.on('load', function () {
            map.addSource("earthquake", {
                type: "geojson",
                data: "[YOUR_GEOJSON_FILE_HERE]" // 此範例所使用的檔案請見 https://www.map8.zone/js/vector/earthquakeHeatmap.json
            });
            
            map.addLayer({
                id: "earthquake",
                type: "heatmap",
                source: "earthquake",
                paint: {
                    'heatmap-weight': [
                        'interpolate',
                        ['linear'],
                        ['get', 'magnitude'],
                        0, 0,
                        6, 1
                    ],
                    'heatmap-intensity': [
                        'interpolate',
                        ['linear'],
                        ['zoom'],
                        0, 1,
                        9, 5
                    ],
                    'heatmap-color': [
                        'interpolate',
                        ['linear'],
                        ['heatmap-density'],
                        0, 'rgba(255,255,255,0)',
                        0.4, '#21cf42',
                        0.6, '#fed23a',
                        0.8, '#ff8400',
                        1, 'red'
                    ],
                    'heatmap-radius': [
                        'interpolate',
                        ['linear'],
                        ['zoom'],
                        0, 2,
                        9, 20
                    ]
                }
            });
        });
        map.once('idle', function(){
            map.moveLayer('earthquake')
        })
    </script>
</body>
</html>