Rendering a COG as a tiled layer.
Tiled data from a Cloud Optimized GeoTIFF (COG) can be rendered as a layer. In this example, a single 3-band GeoTIFF is used to render RGB data.
import 'ol/ol.css';
import GeoTIFF from 'ol/source/GeoTIFF';
import Map from 'ol/Map';
import TileLayer from 'ol/layer/WebGLTile';
const source = new GeoTIFF({
sources: [
{
url: 'https://sentinel-cogs.s3.us-west-2.amazonaws.com/sentinel-s2-l2a-cogs/2020/S2A_36QWD_20200701_0_L2A/TCI.tif',
},
],
});
const map = new Map({
target: 'map',
layers: [
new TileLayer({
source: source,
}),
],
view: source.getView(),
});
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Cloud Optimized GeoTIFF (COG)</title>
<!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
<script src="https://unpkg.com/[email protected]/dist/elm-pep.js"></script>
<!-- The lines below are only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=fetch,requestAnimationFrame,Element.prototype.classList,TextDecoder"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/3.18.3/minified.js"></script>
<style>
.map {
width: 100%;
height:400px;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<script src="main.js"></script>
</body>
</html>
{
"name": "cog",
"dependencies": {
"ol": "6.14.1"
},
"devDependencies": {
"parcel": "^2.0.0"
},
"scripts": {
"start": "parcel index.html",
"build": "parcel build --public-url . index.html"
}
}