Extrude Polygons for 3D Indoor Mapping

Use fill-extrusion layers to create a 3D indoor map from a GeoJSON floor plan.

const API_KEY = 'toursprung';

    const floorplan = {
        type: 'FeatureCollection',
        features: [
            {
                type: 'Feature',
                geometry: { type: 'Polygon', coordinates: [[[11.390, 47.275], [11.392, 47.275], [11.392, 47.277], [11.390, 47.277], [11.390, 47.275]]] },
                properties: { level: 1, name: 'Lobby', color: '#aee', height: 4 }
            },
            {
                type: 'Feature',
                geometry: { type: 'Polygon', coordinates: [[[11.392, 47.275], [11.394, 47.275], [11.394, 47.277], [11.392, 47.277], [11.392, 47.275]]] },
                properties: { level: 1, name: 'Hall A', color: '#fea', height: 6 }
            },
            {
                type: 'Feature',
                geometry: { type: 'Polygon', coordinates: [[[11.390, 47.277], [11.394, 47.277], [11.394, 47.279], [11.390, 47.279], [11.390, 47.277]]] },
                properties: { level: 2, name: 'Hall B', color: '#eaf', height: 8 }
            }
        ]
    };

    const map = new maptoolkit.Map({
        container: 'map',
        style: `https://static.maptoolkit.net/styles/toursprung/terrain.json?api_key=${API_KEY}`,
        center: [11.392, 47.277],
        zoom: 16,
        pitch: 50,
        bearing: 20,
        attributionControl: { compact: false }
    });

    map.addControl(new maptoolkit.NavigationControl(), 'top-right');

    map.on('load', () => {
        map.addSource('floorplan', { type: 'geojson', data: floorplan });

        map.addLayer({
            id: 'rooms-extrusion',
            type: 'fill-extrusion',
            source: 'floorplan',
            paint: {
                'fill-extrusion-color': ['get', 'color'],
                'fill-extrusion-height': ['get', 'height'],
                'fill-extrusion-base': 0,
                'fill-extrusion-opacity': 0.8
            }
        });
    });

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Extrude Polygons for 3D Indoor Mapping – Maptoolkit Maps JS</title>
    <meta property="og:description" content="Use fill-extrusion layers to create a 3D indoor map from a GeoJSON floor plan." />
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://unpkg.com/@maptoolkit/maps@11.0.0-beta.2/dist/maptoolkit.js"></script>
    <link rel="stylesheet" href="https://unpkg.com/@maptoolkit/maps@11.0.0-beta.2/dist/maptoolkit.css" />
    <style>
        html, body { width: 100%; height: 100%; margin: 0; padding: 0; }
        #map { width: 100%; height: 100%; }
    </style>
</head>
<body>
<div id="map"></div>
<script>
    const API_KEY = 'toursprung';

    const floorplan = {
        type: 'FeatureCollection',
        features: [
            {
                type: 'Feature',
                geometry: { type: 'Polygon', coordinates: [[[11.390, 47.275], [11.392, 47.275], [11.392, 47.277], [11.390, 47.277], [11.390, 47.275]]] },
                properties: { level: 1, name: 'Lobby', color: '#aee', height: 4 }
            },
            {
                type: 'Feature',
                geometry: { type: 'Polygon', coordinates: [[[11.392, 47.275], [11.394, 47.275], [11.394, 47.277], [11.392, 47.277], [11.392, 47.275]]] },
                properties: { level: 1, name: 'Hall A', color: '#fea', height: 6 }
            },
            {
                type: 'Feature',
                geometry: { type: 'Polygon', coordinates: [[[11.390, 47.277], [11.394, 47.277], [11.394, 47.279], [11.390, 47.279], [11.390, 47.277]]] },
                properties: { level: 2, name: 'Hall B', color: '#eaf', height: 8 }
            }
        ]
    };

    const map = new maptoolkit.Map({
        container: 'map',
        style: `https://static.maptoolkit.net/styles/toursprung/terrain.json?api_key=${API_KEY}`,
        center: [11.392, 47.277],
        zoom: 16,
        pitch: 50,
        bearing: 20,
        attributionControl: { compact: false }
    });

    map.addControl(new maptoolkit.NavigationControl(), 'top-right');

    map.on('load', () => {
        map.addSource('floorplan', { type: 'geojson', data: floorplan });

        map.addLayer({
            id: 'rooms-extrusion',
            type: 'fill-extrusion',
            source: 'floorplan',
            paint: {
                'fill-extrusion-color': ['get', 'color'],
                'fill-extrusion-height': ['get', 'height'],
                'fill-extrusion-base': 0,
                'fill-extrusion-opacity': 0.8
            }
        });
    });
</script>
</body>
</html>

Draw GeoJSON Points Fit a Map to a Bounding Box