heatmap/index.html at master · uclapi/heatmap · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Heatmap</title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
    <script src='https://api.mapbox.com/mapbox-gl-js/v0.37.0/mapbox-gl.js'></script>
    <link href='https://api.mapbox.com/mapbox-gl-js/v0.37.0/mapbox-gl.css' rel='stylesheet' />
    <style>
      body { margin:0; padding:0; }
      #map { position:absolute; top:0; bottom:0; width:100%; }
    </style>
  </head>
  <body>
    <div id='map'></div>
    <script>
    mapboxgl.accessToken = 'you-mapbox-key-here';
    var map = new mapboxgl.Map({
      container: 'map',
      style: 'mapbox://styles/mapbox/streets-v9',
      center: [-0.1362288, 51.5245625],
      zoom: 15,
      pitch: 45,
      bearing: -17.6,
    });

    // the 'building' layer in the mapbox-streets vector source contains building-height
    // data from OpenStreetMap.
    map.on('load', function() {
        map.addLayer({
            'id': '3d-buildings',
            'source': 'composite',
            'source-layer': 'building',
            'filter': ['==', 'extrude', 'true'],
            'type': 'fill-extrusion',
            'minzoom': 15,
            'paint': {
                'fill-extrusion-color': '#aaa',
                'fill-extrusion-height': {
                    'type': 'identity',
                    'property': 'height'
                },
                'fill-extrusion-base': {
                    'type': 'identity',
                    'property': 'min_height'
                },
                'fill-extrusion-opacity': .6
            }
        });

        // Add a new source from our GeoJSON data and set the
        // 'cluster' option to true.
        map.addSource("bookings", {
            type: "geojson",
            // Point to GeoJSON data. This example visualizes all M1.0+ earthquakes
            // from 12/22/15 to 1/21/16 as logged by USGS' Earthquake hazards program.
            data: "bookings.geojson",
            cluster: true,
            clusterMaxZoom: 15, // Max zoom to cluster points on
            clusterRadius: 10 // Use small cluster radius for the heatmap look
        });

        // Use the earthquakes source to create four layers:
        // three for each cluster category, and one for unclustered points

        // Each point range gets a different fill color.
        var layers = [
            [0, 'green'],
            [10, 'orange'],
            [100, 'red']
        ];

        layers.forEach(function (layer, i) {
            map.addLayer({
                "id": "cluster-" + i,
                "type": "circle",
                "source": "bookings",
                "paint": {
                    "circle-color": layer[1],
                    "circle-radius": 70,
                    "circle-blur": 1 // blur the circles to get a heatmap look
                },
                "filter": i === layers.length - 1 ?
                    [">=", "point_count", layer[0]] :
                    ["all",
                        [">=", "point_count", layer[0]],
                        ["<", "point_count", layers[i + 1][0]]]
            }, 'waterway-label');
        });

        map.addLayer({
            "id": "unclustered-points",
            "type": "circle",
            "source": "bookings",
            "paint": {
                "circle-color": 'rgba(0,255,0,0.5)',
                "circle-radius": 20,
                "circle-blur": 1
            },
            "filter": ["!=", "cluster", true]
        }, 'waterway-label');
    });
    </script>
  </body>
</html>