Display color and elevation Mapbox tilesets.

100% © Mapbox

Mapbox Terrain RGB is an encoding of elevation data where 24 bits of elevation data are encoded using the 3 colors of a PNG image.

index.js 
import XYZ from "ol/source/XYZ.js";

import { MapControls } from "three/examples/jsm/controls/MapControls.js";

import Extent from "@giro3d/giro3d/core/geographic/Extent.js";
import Instance from "@giro3d/giro3d/core/Instance.js";
import ColorLayer from "@giro3d/giro3d/core/layer/ColorLayer.js";
import TiledImageSource from "@giro3d/giro3d/sources/TiledImageSource.js";
import ElevationLayer from "@giro3d/giro3d/core/layer/ElevationLayer.js";
import Map from "@giro3d/giro3d/entities/Map.js";
import Inspector from "@giro3d/giro3d/gui/Inspector.js";
import MapboxTerrainFormat from "@giro3d/giro3d/formats/MapboxTerrainFormat.js";

Instance.registerCRS(
  "EPSG:3857",
  "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs",
);

const extent = new Extent("EPSG:3857", 659030, 735596, 5535152, 5647497);

const instance = new Instance({
  target: "view",
  crs: "EPSG:3857",
});

const map = new Map({ extent });

instance.add(map);

function addLayers(key) {
  const layers = map.getLayers();
  for (const current of layers) {
    map.removeLayer(current);
  }

  // Adds a XYZ elevation layer with MapBox terrain RGB tileset
  const elevationLayer = new ElevationLayer({
    name: "xyz_elevation",
    extent,
    source: new TiledImageSource({
      format: new MapboxTerrainFormat(),
      source: new XYZ({
        url: `https://api.mapbox.com/v4/mapbox.terrain-rgb/{z}/{x}/{y}.pngraw?access_token=${key}`,
        projection: extent.crs,
        crossOrigin: "anonymous",
      }),
    }),
  });
  map.addLayer(elevationLayer);

  // Adds a XYZ color layer with MapBox satellite tileset
  const satelliteLayer = new ColorLayer({
    name: "xyz_color",
    extent,
    source: new TiledImageSource({
      source: new XYZ({
        url: `https://api.mapbox.com/v4/mapbox.satellite/{z}/{x}/{y}.webp?access_token=${key}`,
        projection: extent.crs,
        crossOrigin: "anonymous",
      }),
    }),
  });
  map.addLayer(satelliteLayer);
}

// Create our elevation layer using Giro3D's default mapbox api key
addLayers(
  "pk.eyJ1IjoidG11Z3VldCIsImEiOiJjbGJ4dTNkOW0wYWx4M25ybWZ5YnpicHV6In0.KhDJ7W5N3d1z3ArrsDjX_A",
);

instance.view.camera.position.set(extent.east, extent.south, 2000);

const controls = new MapControls(instance.view.camera, instance.domElement);
controls.target = extent.centerAsVector3();
controls.saveState();
controls.enableDamping = true;
controls.dampingFactor = 0.2;
controls.maxPolarAngle = Math.PI / 2.3;
instance.view.setControls(controls);

document.getElementById("mapboxApi").addEventListener("submit", (e) => {
  e.preventDefault();

  addLayers(document.getElementById("mapboxApiKey").value);
});

Inspector.attach("inspector", instance);
index.html 
<!doctype html>
<html lang="en">
  <head>
    <title>Mapbox tilesets</title>
    <meta charset="UTF-8" />
    <meta name="name" content="planar_mapbox" />
    <meta
      name="description"
      content="Display color and elevation Mapbox tilesets."
    />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />

    <link rel="icon" href="https://giro3d.org/images/favicon.svg" />
    <link
      href="https://giro3d.org/assets/bootstrap-custom.css"
      rel="stylesheet"
    />
    <script src="https://giro3d.org/assets/bootstrap.bundle.min.js"></script>
    <link
      rel="stylesheet"
      type="text/css"
      href="https://giro3d.org/next/examples/css/example.css"
    />
  </head>

  <body>
    <div id="view" class="m-0 p-0 w-100 h-100"></div>
    <div
      id="inspector"
      class="position-absolute top-0 start-0 mh-100 overflow-auto"
    ></div>

    <div class="side-pane-with-status-bar">
      <form class="row row-cols-lg-auto g-3 align-items-center" id="mapboxApi">
        <div class="input-group">
          <input
            type="text"
            class="form-control"
            id="mapboxApiKey"
            placeholder="Custom Mapbox API key..."
          />
        </div>
      </form>
    </div>

    <script type="module" src="index.js"></script>
    <script>
      /* activate popovers */
      const popoverTriggerList = [].slice.call(
        document.querySelectorAll('[data-bs-toggle="popover"]'),
      );
      popoverTriggerList.map(
        // bootstrap is used as script in the template, disable warning about undef
        // eslint-disable-next-line no-undef
        (popoverTriggerEl) =>
          new bootstrap.Popover(popoverTriggerEl, {
            trigger: "hover",
            placement: "left",
            content: document.getElementById(
              popoverTriggerEl.getAttribute("data-bs-content"),
            ).innerHTML,
            html: true,
          }),
      );
    </script>
  </body>
</html>
package.json 
{
    "name": "planar_mapbox",
    "dependencies": {
        "@giro3d/giro3d": "git+https://gitlab.com/giro3d/giro3d.git"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}