fill

The simplest representation of a geometry layer on a map is a fill map, which fills a specified area with a specified color.

accomplish

Let’s introduce how to draw a simple filled diagram.

• you canL7Found on the official websiteOnline case

import { Scene, PolygonLayer, LineLayer, Popup } from '@antv/l7';
import { GaodeMap } from '@antv/l7-maps';

const scene = new Scene({
  id: 'map',
  map: new GaodeMap({
    style: 'light',
    center: [-96, 37.8],
    zoom: 3,
  }),
});
scene.on('loaded', () => {
  fetch('https://gw.alipayobjects.com/os/basement_prod/d36ad90e-3902-4742-b8a2-d93f7e5dafa2.json')
    .then((res) => res.json())
    .then((data) => {
      const color = [
        'rgb(255,255,217)',
        'rgb(237,248,177)',
        'rgb(199,233,180)',
        'rgb(127,205,187)',
        'rgb(65,182,196)',
        'rgb(29,145,192)',
        'rgb(34,94,168)',
        'rgb(12,44,132)',
      ];
      const layer = new PolygonLayer({})
        .source(data)
        .scale('density', {
          type: 'quantile',
        })
        .color('density', color)
        .shape('fill')
        .active(true);
      const layer2 = new LineLayer({
        zIndex: 2,
      })
        .source(data)
        .color('#fff')
        .active(true)
        .size(1)
        .style({
          lineType: 'dash',
          dashArray: [2, 2],
        });
      scene.addLayer(layer);
      scene.addLayer(layer2);
    });
});

source

It is recommended to use the standard geometry layerGeoJSONdata.

shape

Draw a filled diagram, the shape isfillConstant, data mapping is not supported

layer.shape('fill');

size

Fill image does not need to be setsize;

style

• opacityLinearSets the radial gradient of the geometric fill.

style({ opacity Linear: { enable: true, // true - false dir: 'in', // n - out },
});

radial gradient in

radial gradient out

• raisingHeightset up3DThe elevation of the fill pattern.