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calvinmetcalf/index.html

Created November 3, 2017 13:48
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index.html
<!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://api.tiles.mapbox.com/mapbox-gl-js/v0.41.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.41.0/mapbox-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>
mapboxgl.accessToken = 'pk.eyJ1IjoiYXBwZ2VvIiwiYSI6ImNqOWp5Ymg4ZDN6eW0zM3M0eTBiYnZldTgifQ.ebut-3T_3XjOWroT_B91ag';
var map = new mapboxgl.Map({
style: 'mapbox://styles/mapbox/light-v9',
center: [-74.0066, 40.7135],
zoom: 15,
pitch: 45,
bearing: -17.6,
hash: true,
container: 'map'
});
var nav = new mapboxgl.NavigationControl();
map.addControl(nav, 'top-left');
// The 'building' layer in the mapbox-streets vector source contains building-height
// data from OpenStreetMap.
map.on('load', function() {
// Insert the layer beneath any symbol layer.
var layers = map.getStyle().layers.reverse();
var labelLayerIdx = layers.findIndex(function (layer) {
return layer.type !== 'symbol';
});
var labelLayerId = labelLayerIdx !== -1 ? layers[labelLayerIdx].id : undefined;
map.addLayer({
'id': '3d-buildings',
'source': 'composite',
'source-layer': 'building',
'filter': ['==', 'extrude', 'true'],
'type': 'fill-extrusion',
'minzoom': 15,
'paint': {
'fill-extrusion-color': '#aaa',
'fill-extrusion-height': {
'type': 'identity',
'property': 'height'
},
'fill-extrusion-base': {
'type': 'identity',
'property': 'min_height'
},
'fill-extrusion-opacity': .6
}
}, labelLayerId);
});
</script>
</body>
</html>
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