mirror of https://gitee.com/antv-l7/antv-l7
151 lines
3.1 KiB
TypeScript
151 lines
3.1 KiB
TypeScript
import { RasterLayer, Scene, Source } from '@antv/l7';
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import { GaodeMap } from '@antv/l7-maps';
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import React, { useEffect } from 'react';
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import * as GeoTIFF from 'geotiff';
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const colorList = [
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'#419bdf', // Water
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'#419bdf',
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'#397d49', // Tree
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'#397d49',
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'#88b053', // Grass
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'#88b053',
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'#7a87c6', // vegetation
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'#7a87c6',
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'#e49635', // Crops
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'#e49635',
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'#dfc35a', // shrub
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'#dfc35a',
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'#c4281b', // Built Area
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'#c4281b',
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'#a59b8f', // Bare ground
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'#a59b8f',
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'#a8ebff', // Snow
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'#a8ebff',
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'#616161', // Clouds
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'#616161'
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];
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const positions = [
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0.0,
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0.1,
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0.1,
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0.2,
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0.2,
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0.3,
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0.3,
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0.4,
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0.4,
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0.5,
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0.5,
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0.6,
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0.6,
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0.7,
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0.7,
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0.8,
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0.8,
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0.9,
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0.9,
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1.0
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];
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export default () => {
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useEffect(() => {
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const scene = new Scene({
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id: 'map',
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stencil: true,
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map: new GaodeMap({
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center: [ 116, 27 ],
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zoom: 6,
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style: 'dark'
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})
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});
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scene.on('loaded', () => {
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fetch(
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'https://gw.alipayobjects.com/os/bmw-prod/fccd80c0-2611-49f9-9a9f-e2a4dd12226f.json'
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)
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.then(res => res.json())
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.then(maskData => {
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const layer = new RasterLayer({
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mask: true,
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maskfence: maskData
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});
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const urls = [
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'https://ganos.oss-cn-hangzhou.aliyuncs.com/m2/l7/tiff_jx/{z}/{x}/{y}.tiff',
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'https://ganos.oss-cn-hangzhou.aliyuncs.com/m2/l7/tiff_jx/{z}/{x}/{y}.tiff',
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]
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const tileSource = new Source(urls,
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{
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parser: {
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type: 'rasterTile',
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dataType: 'arraybuffer',
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tileSize: 256,
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maxZoom: 13.1,
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format: async data => {
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const tiff = await GeoTIFF.fromArrayBuffer(data[0]);
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const image = await tiff.getImage();
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const width = image.getWidth();
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const height = image.getHeight();
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const values = await image.readRasters();
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const rasterData = values[0];
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const tiff2 = await GeoTIFF.fromArrayBuffer(data[1]);
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const image2 = await tiff2.getImage();
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const values2 = await image2.readRasters();
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const rasterData2 = values2[0];
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const r = rasterData.map((d, i) => {
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const d2 = rasterData2[i]
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return d/2 + d2/3
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})
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return { rasterData: r, width, height };
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}
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}
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});
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layer.source(tileSource)
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.style({
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domain: [ 0.001, 11.001 ],
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clampLow: false,
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rampColors: {
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colors: colorList,
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positions
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}
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});
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scene.addLayer(layer);
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});
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});
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return () => {
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scene.destroy();
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};
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}, []);
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return (
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<div
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id="map"
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style={{
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height: '500px',
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position: 'relative',
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}}
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/>
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);
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};
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