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Draw GeoJSON points

Draw points from a GeoJSON collection to a map.

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Draw GeoJSON points</title>
    <meta property="og:description" content="Draw points from a GeoJSON collection to a map." />
    <meta charset='utf-8'>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel='stylesheet' href='https://unpkg.com/maplibre-gl@4.4.0/dist/maplibre-gl.css' />
    <script src='https://unpkg.com/maplibre-gl@4.4.0/dist/maplibre-gl.js'></script>
    <style>
        body { margin: 0; padding: 0; }
        html, body, #map { height: 100%; }
    </style>
</head>
<body>
<div id="map"></div>
<script>
    const map = new maplibregl.Map({
        container: 'map',
        style:
            'https://api.maptiler.com/maps/positron/style.json?key=get_your_own_OpIi9ZULNHzrESv6T2vL',
        center: [0, 0],
        zoom: 1
    });

    map.on('load', async () => {
        // Add an image to use as a custom marker
        const image = await map.loadImage('https://maplibre.org/maplibre-gl-js/docs/assets/osgeo-logo.png');
        map.addImage('custom-marker', image.data);
        // Add a GeoJSON source with 15 points
        map.addSource('conferences', {
            'type': 'geojson',
            'data': {
                'type': 'FeatureCollection',
                'features': [
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [100.4933, 13.7551]
                        },
                        'properties': {'year': '2004'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [6.6523, 46.5535]
                        },
                        'properties': {'year': '2006'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [-123.3596, 48.4268]
                        },
                        'properties': {'year': '2007'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [18.4264, -33.9224]
                        },
                        'properties': {'year': '2008'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [151.195, -33.8552]
                        },
                        'properties': {'year': '2009'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [2.1404, 41.3925]
                        },
                        'properties': {'year': '2010'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [-104.8548, 39.7644]
                        },
                        'properties': {'year': '2011'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [-1.1665, 52.9539]
                        },
                        'properties': {'year': '2013'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [-122.6544, 45.5428]
                        },
                        'properties': {'year': '2014'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [126.974, 37.5651]
                        },
                        'properties': {'year': '2015'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [7.1112, 50.7255]
                        },
                        'properties': {'year': '2016'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [-71.0314, 42.3539]
                        },
                        'properties': {'year': '2017'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [39.2794, -6.8173]
                        },
                        'properties': {'year': '2018'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [26.0961, 44.4379]
                        },
                        'properties': {'year': '2019'}
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [-114.0879, 51.0279]
                        },
                        'properties': {'year': '2020'}
                    }
                ]
            }
        });

        // Add a symbol layer
        map.addLayer({
            'id': 'conferences',
            'type': 'symbol',
            'source': 'conferences',
            'layout': {
                'icon-image': 'custom-marker',
                // get the year from the source's "year" property
                'text-field': ['get', 'year'],
                'text-font': [
                    'Open Sans Semibold',
                    'Arial Unicode MS Bold'
                ],
                'text-offset': [0, 1.25],
                'text-anchor': 'top'
            }
        });
    });
</script>
</body>
</html>