Cloud Optimized GeoTIFF (COG)

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.

main.js

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(),
});

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Cloud Optimized GeoTIFF (COG)</title>
    <link rel="stylesheet" href="node_modules/ol/ol.css">
    <style>
      .map {
        width: 100%;
        height: 400px;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
    <!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
    <script src="https://unpkg.com/[email protected]/dist/elm-pep.js"></script>
    <script type="module" src="main.js"></script>
  </body>
</html>

package.json

{
  "name": "cog",
  "dependencies": {
    "ol": "7.1.0"
  },
  "devDependencies": {
    "vite": "^3.0.3",
    "@babel/core": "latest"
  },
  "scripts": {
    "start": "vite",
    "build": "vite build"
  }
}