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Slowly fly to a location

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This example uses flyTo with flyOptions to slowly zoom to a location, and creates a custom atmosphere effect using setFog.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Slowly fly to a location</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v3.9.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v3.9.0/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<style>
    #fly {
        display: block;
        position: relative;
        margin: 0px auto;
        width: 50%;
        height: 40px;
        padding: 10px;
        border: none;
        border-radius: 3px;
        font-size: 12px;
        text-align: center;
        color: #fff;
        background: #ee8a65;
    }
</style>
<div id="map"></div>
<br>
<button id="fly">Fly</button>
<script>
	// TO MAKE THE MAP APPEAR YOU MUST
	// ADD YOUR ACCESS TOKEN FROM
	// https://account.mapbox.com
	mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';
    // These options control the camera position after animation
    const start = {
        center: [80, 36],
        zoom: 1,
        pitch: 0,
        bearing: 0
    };
    const end = {
        center: [8.11862, 46.58842],
        zoom: 12.5,
        bearing: 130,
        pitch: 75
    };
    const map = new mapboxgl.Map({
        container: 'map',
        // Choose from Mapbox's core styles, or make your own style with Mapbox Studio
        style: 'mapbox://styles/mapbox/satellite-streets-v12',
        ...start
    });

    map.on('style.load', () => {
        // Custom atmosphere styling
        map.setFog({
            'color': 'rgb(220, 159, 159)', // Pink fog / lower atmosphere
            'high-color': 'rgb(36, 92, 223)', // Blue sky / upper atmosphere
            'horizon-blend': 0.4 // Exaggerate atmosphere (default is .1)
        });

        map.addSource('mapbox-dem', {
            'type': 'raster-dem',
            'url': 'mapbox://mapbox.terrain-rgb'
        });

        map.setTerrain({
            'source': 'mapbox-dem',
            'exaggeration': 1.5
        });
    });

    let isAtStart = true;

    document.getElementById('fly').addEventListener('click', () => {
        // depending on whether we're currently at point a or b,
        // aim for point a or b
        const target = isAtStart ? end : start;
        isAtStart = !isAtStart;

        map.flyTo({
            ...target, // Fly to the selected target
            duration: 12000, // Animate over 12 seconds
            essential: true // This animation is considered essential with
            //respect to prefers-reduced-motion
        });
    });
</script>

</body>
</html>
This code snippet will not work as expected until you replace YOUR_MAPBOX_ACCESS_TOKEN with an access token from your Mapbox account.
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