Skip to main content

3Dheat map

Useheatmap-3dType layers visualize the value of an attribute in different locations.

show
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <title>3Dheat map</title>
    <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no"/>
    <style>
        body {
            margin: 0;
            padding: 0;
        }

        #map {
            position: absolute;
            top: 0;
            bottom: 0;
            width: 100%;
        }
    </style>
     <script src="./heatmap.js"></script>
    <script src="https://delivery.mapmost.com/cdn/sdk/lite/v9.1.0/mapmost-lite-min.js"></script>
</head>
<body>
<div id="map"></div>
<script>
    let map = new mapmost.Map({
        container: 'map',
        style: "<your style url>",
        center: [120.71930846, 31.2911422673],
        zoom: 13,
        pitch: 60,
        bearing: 0,
        userId: '***', // Authorization code,This parameter must be added
    });
    
      map.on('load', function () {
      
              fetch('../example_data/random_points_3857.geojson').then(
                  res => res.json()
              ).then(response => {
                  let dataPoints = [];
                  response.features.map(item => {
                      let coor = item.geometry.coordinates;
                      dataPoints.push([coor[0], coor[1], item.properties.num])
                  })
      
                  let op = {
                      id: '3d-heatmap-layer',
                      type: 'heatmap-3d',
                      data: dataPoints,//dataPoints = [[lon,lat,value]]，The parameters are longitude, latitude, and attribute values.
                      width: 256,//Heat map canvas width, default256
                      height: 256,//Heat map canvas height, default256
                      heightRatio: 200,//3DHeat map stretch height, default200
                      proj:"3857",//Coordinate system support'3857'and'4326'，default'4326'
                      blur: 0.85,//[0,1] Optional parameters default = 0.85 ，Applies to all point data. The higher the coefficient, the smoother the gradient. The default is0.85
                      radius: 6, //Radius of each data point, default6
                      gradient: {
                          '0.1': 'rgb(0,102,255)',
                          '0.2': 'rgb(102,255,255)',
                          '0.3': 'rgb(102,255,153)',
                          '0.4': 'rgb(125,255,0)',
                          '0.5': 'rgb(255,255,0)',
                          '0.6': 'rgb(255,204,0)',
                          '0.7': 'rgb(255,128,0)',
                          '0.8': 'rgb(255,102,0)',
                          '0.9': 'rgb(255,0,0)',
                      }, //A ribbon object representing a gradient,If not set, the default style will be used
                  };
      
                  map.addLayer(op);
              })
      
          });
</script>
</body>
</html>