Display buildings in 3D | NMaps GL JS Docs

Use extrusions to display buildings' height in 3D.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Display buildings in 3D</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://cdn.ndrive.com/nmapsgl/v.1.6.8/nmaps-gl.js"></script>
<link href="https://cdn.ndrive.com/nmapsgl/v.1.6.8/nmaps-gl.css" rel="stylesheet" />
<style>
	body { margin: 0; padding: 0; }
	#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<div id="map"></div>
<script>
	// TO MAKE THE MAP APPEAR YOU MUST ADD YOUR ACCESS TOKEN
	nmapsgl.accessToken = '<your access token here>';
	
const map = new nmapsgl.Map({
style: 'Streets',
center: [-74.0066, 40.7135],
zoom: 15.5,
pitch: 45,
bearing: -17.6,
container: 'map',
antialias: true
});
 
// The 'building' layer in the streets vector source contains building-height
// data from OpenStreetMap.
map.on('load', () => {
// Insert the layer beneath any symbol layer.
const layers = map.getStyle().layers;
 
const labelLayerId = layers.find(
(layer) => layer.type === 'symbol' && layer.layout['text-field']
).id;
 
map.addLayer(
{
'id': '3d-buildings',
'source': 'ndrive-map',
'source-layer': 'building',
'type': 'fill-extrusion',
'minzoom': 15,
'paint': {
'fill-extrusion-color': '#47f',
 
// use an 'interpolate' expression to add a smooth transition effect to the
// buildings as the user zooms in
'fill-extrusion-height': [
'interpolate',
['linear'],
['zoom'],
15,
0,
15.05,
['get', 'height']
],
'fill-extrusion-base': [
'interpolate',
['linear'],
['zoom'],
15,
0,
15.05,
['get', 'min_height']
],
'fill-extrusion-opacity': 0.6
}
},
labelLayerId
);
});
</script>
 
</body>
</html>