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@almccon
Created February 22, 2018 16:07
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MapboxGL Century City
license: mit
<!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/v0.44.1/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.44.1/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.eyJ1IjoiYWxtY2NvbiIsImEiOiJDYXFYUW4wIn0.bvVdjJzPKs0PsGr4_NQfbA';
var map = new mapboxgl.Map({
style: 'mapbox://styles/mapbox/light-v9',
center: [-118.413, 34.052],
zoom: 15.5,
pitch: 20,
bearing: -35,
hash: true,
container: 'map'
});
// 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;
var labelLayerId;
for (var i = 0; i < layers.length; i++) {
if (layers[i].type === 'symbol' && layers[i].layout['text-field']) {
labelLayerId = layers[i].id;
break;
}
}
map.addLayer({
'id': '3d-buildings',
'source': 'composite',
'source-layer': 'building',
'filter': ['==', 'extrude', 'true'],
'type': 'fill-extrusion',
'minzoom': 15,
'paint': {
'fill-extrusion-color': '#aaa',
// 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': .6
}
}, labelLayerId);
});
</script>
</body>
</html>
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