antv-l7/stories/Map/components/amap2demo_heatmap_hexagon.tsx

import { vec2, vec3 } from 'gl-matrix';
// @ts-ignore
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_hexagon 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: 58.5,
        pitch: 43,
        center: [ 120.13383079335335, 29.651873105004427 ],
        zoom: 7.068989519212174
      }),
    });
    this.scene = scene;

    scene.on('loaded', () => {
      fetch(
        'https://gw.alipayobjects.com/os/basement_prod/a1a8158d-6fe3-424b-8e50-694ccf61c4d7.csv'
      )
        .then(res => res.text())
        .then(data => {
          const layer = new HeatmapLayer({})
            .source(data, {
              parser: {
                type: 'csv',
                x: 'lng',
                y: 'lat'
              },
              transforms: [
                {
                  type: 'hexagon',
                  size: 2500,
                  field: 'v',
                  method: 'sum'
                }
              ]
            })
            .size('sum', sum => {
              return sum * 200;
            })
            .shape('hexagonColumn')
            .style({
              coverage: 0.8,
              angle: 0,
              opacity: 1.0
            })
            .color('sum', [
              '#094D4A',
              '#146968',
              '#1D7F7E',
              '#289899',
              '#34B6B7',
              '#4AC5AF',
              '#5FD3A6',
              '#7BE39E',
              '#A1EDB8',
              '#C3F9CC',
              '#DEFAC0',
              '#ECFFB1'
            ]);
          scene.addLayer(layer);
        });
    });
  }

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