antv-l7/stories/Map/components/amap2demo_heatmap.tsx

import {
  ILngLat,
  PointLayer,
  PolygonLayer,
  Scene,
  HeatmapLayer,
} from '@antv/l7';
import { GaodeMap, GaodeMap2 } from '@antv/l7-maps';
import * as React from 'react';

export default class Amap2demo_heatmap extends React.Component {
  // @ts-ignore
  private scene: Scene;

  public componentWillUnmount() {
    this.scene.destroy();
  }

  public async componentDidMount() {
    const scene = new Scene({
      id: 'map',
      map: new GaodeMap2({
        pitch: 0,
        center: [127.5671666579043, 7.445038892195569],
        zoom: 2.632456779444394,
      }),
    });
    this.scene = scene;

    scene.on('loaded', () => {
      fetch(
        'https://gw.alipayobjects.com/os/basement_prod/d3564b06-670f-46ea-8edb-842f7010a7c6.json',
      )
        .then((res) => res.json())
        .then((data) => {
          const layer = new HeatmapLayer({})
            .source(data)
            .shape('heatmap')
            .size('mag', [0, 1.0]) // weight映射通道
            .style({
              intensity: 2,
              radius: 20,
              opacity: 1.0,
              rampColors: {
                colors: [
                  '#FF4818',
                  '#F7B74A',
                  '#FFF598',
                  '#91EABC',
                  '#2EA9A1',
                  '#206C7C',
                ].reverse(),
                positions: [0, 0.2, 0.4, 0.6, 0.8, 1.0],
              },
            });
          scene.addLayer(layer);
        });
    });
  }

  public render() {
    return (
      <>
        <div
          id="map"
          style={{
            position: 'absolute',
            top: 0,
            left: 0,
            right: 0,
            bottom: 0,
          }}
        />
      </>
    );
  }
}