This example creates an extruded polygon around lower Manhattan. The polygon is a triangular prism, with a height of 1000 meters and 50% opacity.
<!DOCTYPE html>
<html>
<head>
<title>Photorealistic 3D Maps in Maps JavaScript Polygon Demo</title>
<style>
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
gmp-map-3d {
height: 400px;
}
</style>
</head>
<body>
<gmp-map-3d mode="hybrid" center="40.7079,-74.0132,100" heading="30" tilt="55" range="5000">
<gmp-polygon-3d altitude-mode="relative-to-ground" fill-color="rgba(255, 0, 0, 0.5)" stroke-color="#0000ff" stroke-width="8" extruded><gmp-polygon-3d>
</gmp-map-3d>
<script>
(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})({
key: "<YOUR_API_KEY>",
v: "alpha"
});
</script>
<script>
const polygon = document.querySelector('gmp-polygon-3d');
async function init() {
// Import the needed libraries.
await google.maps.importLibrary('maps3d');
polygon.outerCoordinates = [
{lat: 40.7144, lng: -74.0208, altitude: 1000},
{lat: 40.6993, lng: -74.019, altitude: 1000},
{lat: 40.7035, lng: -74.0004, altitude: 1000},
{lat: 40.7144, lng: -74.0208, altitude: 1000}
];
}
init();
</script>
</body>
</html>