69 lines
1.7 KiB
JavaScript
69 lines
1.7 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 Projection from '../src/ol/proj/Projection.js';
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import TileLayer from '../src/ol/layer/WebGLTile.js';
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import View from '../src/ol/View.js';
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import proj4 from 'proj4';
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import {getCenter} from '../src/ol/extent.js';
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import {register} from '../src/ol/proj/proj4.js';
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proj4.defs('EPSG:32645', '+proj=utm +zone=45 +datum=WGS84 +units=m +no_defs');
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register(proj4);
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const projection = new Projection({
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code: 'EPSG:32645',
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extent: [166021.44, 0.0, 534994.66, 9329005.18],
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});
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const sourceExtent = [382200, 2279370, 610530, 2512500];
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const base =
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'https://landsat-pds.s3.amazonaws.com/c1/L8/139/045/LC08_L1TP_139045_20170304_20170316_01_T1/LC08_L1TP_139045_20170304_20170316_01_T1';
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// scale values in this range to 0 - 1
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const min = 10000;
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const max = 15000;
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const map = new Map({
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target: 'map',
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layers: [
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new TileLayer({
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extent: sourceExtent,
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style: {
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saturation: -0.3,
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},
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source: new GeoTIFF({
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sources: [
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{
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url: `${base}_B6.TIF`,
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overviews: [`${base}_B6.TIF.ovr`],
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min: min,
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max: max,
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nodata: 0,
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},
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{
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url: `${base}_B5.TIF`,
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overviews: [`${base}_B5.TIF.ovr`],
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min: min,
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max: max,
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nodata: 0,
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},
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{
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url: `${base}_B3.TIF`,
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overviews: [`${base}_B3.TIF.ovr`],
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min: min,
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max: max,
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nodata: 0,
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},
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],
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}),
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}),
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],
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view: new View({
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center: getCenter(sourceExtent),
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extent: sourceExtent,
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zoom: 8,
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projection: projection,
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}),
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});
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