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';

// Defines projection that we will use (taken from https://epsg.io/3857, Proj4js section)
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',
);

// Defines geographic extent: CRS, min/max X, min/max Y
const extent = new Extent('EPSG:3857', 659030, 735596, 5535152, 5647497);

// `viewerDiv` will contain Giro3D' rendering area (the canvas element)
const viewerDiv = document.getElementById('viewerDiv');

// Creates the Giro3D instance
const instance = new Instance(viewerDiv, { crs: 'EPSG:3857' });

// Adds the map that will contain the layers.
const map = new Map('planar', { 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',
);

// Sets the camera position
instance.camera.camera3D.position.set(extent.east(), extent.south(), 2000);

// Creates controls
const controls = new MapControls(instance.camera.camera3D, instance.domElement);

// Then looks at extent's center
controls.target = extent.centerAsVector3();
controls.saveState();

controls.enableDamping = true;
controls.dampingFactor = 0.2;
controls.maxPolarAngle = Math.PI / 2.3;

instance.useTHREEControls(controls);

Inspector.attach(document.getElementById('panelDiv'), instance);

document.getElementById('mapboxApi').addEventListener('submit', e => {
    e.preventDefault();
    addLayers(document.getElementById('mapboxApiKey').value);
});

// Bind events
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/latest/css/example.css"
        />

        
    </head>

    <body>
        <div id="viewerDiv" class="m-0 p-0 w-100 h-100"></div>
        <div id="panelDiv" 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": "0.37.3"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}