54 lines
1.4 KiB
JavaScript
54 lines
1.4 KiB
JavaScript
import GeoTIFF from '../src/ol/source/GeoTIFF.js';
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import Map from '../src/ol/Map.js';
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import TileGrid from '../src/ol/tilegrid/TileGrid.js';
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import View from '../src/ol/View.js';
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import WebGLTileLayer from '../src/ol/layer/WebGLTile.js';
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import {createXYZ} from '../src/ol/tilegrid.js';
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import {sourcesFromTileGrid} from '../src/ol/source.js';
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// Metadata from https://s2downloads.eox.at/demo/EOxCloudless/2019/rgb/2019_EOxCloudless_rgb.json
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// Tile grid of the GeoTIFF pyramid layout
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const tileGrid = new TileGrid({
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extent: [-180, -90, 180, 90],
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resolutions: [0.703125, 0.3515625, 0.17578125, 8.7890625e-2, 4.39453125e-2],
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tileSizes: [
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[512, 256],
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[1024, 512],
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[2048, 1024],
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[4096, 2048],
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[4096, 4096],
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],
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});
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const pyramid = new WebGLTileLayer({
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sources: sourcesFromTileGrid(
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tileGrid,
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([z, x, y]) =>
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new GeoTIFF({
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tileGrid: createXYZ({
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extent: tileGrid.getTileCoordExtent([z, x, y]),
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minZoom: z,
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maxZoom:
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z === tileGrid.getResolutions().length - 1 ? undefined : z + 1,
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}),
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sources: [
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{
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url: `https://s2downloads.eox.at/demo/EOxCloudless/2019/rgb/${z}/${y}/${x}.tif`,
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},
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],
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})
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),
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});
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const map = new Map({
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target: 'map',
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layers: [pyramid],
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view: new View({
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projection: 'EPSG:4326',
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center: [0, 0],
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zoom: 0,
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showFullExtent: true,
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}),
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});
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