Class: HeatMapLayer

$.ajax({
      type: 'GET',
      url: 'https://www.thingjs.com/uearth/res/beijing-POIs-3211.geojson',
      dataType: 'json',
      success: function (data) {
          var heatmapLayer = app.create({
              type: 'HeatMapLayer',
              dataSource: data, //数据源 geojson格式
              valueField: 'code', //权重字段
              needsUpdate: true, //是否随相机的变化重新绘制热力图
              renderer: {
                  radius: 10, // 影响半径
                  minOpacity: 0.2,//最小值的透明度
                  maxOpacity: 0.8,//最大值的透明度
                  mosaic: true,//是否使用马赛克效果
                  mosaicSize: 5,//马赛克效果的像素值
                  gradient: { 0: 'rgb(0,0,255)', 0.33: 'rgb(0,255,0)', 0.66: 'rgb(255,255,0)', 1.0: 'rgb(255,0,0)' } //色带
              },
          });
          map.addLayer(heatmapLayer);
      }
  });

Members

---

dataSource :Object

生成热力图使用的数据源 支持geojson的点数据源

Type:

• Object

Example

heatMapLayer.dataSource =  {
      "type": "FeatureCollection",
      "features": [{
          "type": "Feature",
          "properties": {
            "type": "rain",
            "value": 5
          },
          "geometry": {
            "type": "Point",
            "coordinates": [-73.99995803833008, 40.71805432623303]
          }
        }, {
          "type": "Feature",
          "properties": {
            "type": "water",
            "value": 7
          },
          "geometry": {
            "type": "Point",
            "coordinates": [-73.98167610168457, 40.726087955120704]
          }
        }]
      }

---

needsUpdate :Boolean

是否随相机变化刷新

Type:

• Boolean

---

valueField :String

热力图权重字段

Type:

• String