Add an atmospheric sky layer to a map | Mapbox GL JS

Add a customizable sky layer that simulates the natural scattering of light in the atmosphere.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Add an atmospheric sky layer to a map</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v2.3.1/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v2.3.1/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<style>
#inputs {
position: absolute;
top: 0;
left: 0;
padding: 10px;
}
</style>
 
<div id="map"></div>
<div id="inputs">
<input type="button" id="sunriseEnd" value="sunrise">
<input type="button" id="goldenHourEnd" value="morning">
<input type="button" id="solarNoon" value="afternoon">
<input type="button" id="goldenHour" value="evening">
<input type="button" id="sunsetStart" value="sunset">
<input type="button" id="getlocal" value="local time">
<input type="button" id="next30mins" value="+30 mins">
<input type="button" id="prev30mins" value="-30 mins">
<input type="button" id="next30days" value="+30 days">
<input type="button" id="prev30days" value="-30 days">
</div>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/suncalc/1.8.0/suncalc.min.js"></script>
 
<script>
	// TO MAKE THE MAP APPEAR YOU MUST
	// ADD YOUR ACCESS TOKEN FROM
	// https://account.mapbox.com
	mapboxgl.accessToken = '<your access token here>';
var map = new mapboxgl.Map({
container: 'map',
zoom: 14.77,
center: [127.60597, 35.67283],
pitch: 83,
style: 'mapbox://styles/mapbox-map-design/ckhqrf2tz0dt119ny6azh975y'
});
 
// add a sky layer when the style has loaded
map.on('load', function () {
map.addSource('mapbox-dem', {
'type': 'raster-dem',
'url': 'mapbox://mapbox.mapbox-terrain-dem-v1',
'tileSize': 512,
'maxzoom': 14
});
map.setTerrain({ 'source': 'mapbox-dem', 'exaggeration': 1.5 });
 
map.addLayer({
'id': 'sky',
'type': 'sky',
'paint': {
'sky-opacity': [
'interpolate',
['linear'],
['zoom'],
0,
0,
5,
0.3,
8,
1
],
// set up the sky layer for atmospheric scattering
'sky-type': 'atmosphere',
// explicitly set the position of the sun rather than allowing the sun to be attached to the main light source
'sky-atmosphere-sun': getSunPosition(),
// set the intensity of the sun as a light source (0-100 with higher values corresponding to brighter skies)
'sky-atmosphere-sun-intensity': 5
}
});
});
 
function updateSunPosition(sunPos) {
// update the `sky-atmosphere-sun` paint property with the position of the sun based on the selected time
// the position of the sun is calculated using the SunCalc library
map.setPaintProperty('sky', 'sky-atmosphere-sun', sunPos);
}
 
// set up event listeners for the buttons to update
// the position of the sun for times of the day
var sunTimeLabels = [
'sunriseEnd',
'goldenHourEnd',
'solarNoon',
'goldenHour',
'sunsetStart'
];
var sunTimes = SunCalc.getTimes(
Date.now(),
map.getCenter().lat,
map.getCenter().lng
);
sunTimeLabels.forEach(function (btnId) {
document.getElementById(btnId).addEventListener('click', function () {
var sunPos = getSunPosition(sunTimes[btnId]);
updateSunPosition(sunPos);
});
});
 
var date = new Date();
// set up event listeners for the buttons to update
// the position of the sun as you change time
document
.getElementById('next30mins')
.addEventListener('click', function () {
date.setTime(date.getTime() + 30 * 60 * 1000);
var sunPos = getSunPosition(date);
updateSunPosition(sunPos);
});
document
.getElementById('prev30mins')
.addEventListener('click', function () {
date.setTime(date.getTime() - 30 * 60 * 1000);
var sunPos = getSunPosition(date);
updateSunPosition(sunPos);
});
document
.getElementById('next30days')
.addEventListener('click', function () {
date.setMonth(date.getMonth() + 1);
var sunPos = getSunPosition(date);
updateSunPosition(sunPos);
});
document
.getElementById('prev30days')
.addEventListener('click', function () {
date.setMonth(date.getMonth() - 1);
var sunPos = getSunPosition(date);
updateSunPosition(sunPos);
});
document.getElementById('getlocal').addEventListener('click', function () {
date = new Date();
var sunPos = getSunPosition(date);
updateSunPosition(sunPos);
});
 
function getSunPosition(date) {
var center = map.getCenter();
var sunPos = SunCalc.getPosition(
date || Date.now(),
center.lat,
center.lng
);
var sunAzimuth = 180 + (sunPos.azimuth * 180) / Math.PI;
var sunAltitude = 90 - (sunPos.altitude * 180) / Math.PI;
return [sunAzimuth, sunAltitude];
}
</script>
 
</body>
</html>