Select features around a clicked point | Mapbox GL JS

Click on the map to query features using queryRenderedFeatures.

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Use a custom tileset

This example uses U.S. county data uploaded to Mapbox as a vector tileset. This data is not updated or maintained and **should not be used in production applications.**If you're interested in creating an application that uses U.S. county data, you can download a Shapefile from census.gov's data portal or create your own from US FIPS / county data and upload it to Mapbox Studio's Tilesets page.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Select features around a clicked point</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v3.3.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v3.3.0/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<div id="map"></div>

<script>
	// TO MAKE THE MAP APPEAR YOU MUST
	// ADD YOUR ACCESS TOKEN FROM
	// https://account.mapbox.com
	mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';
    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/streets-v12',
        center: [-98, 38.88],
        minZoom: 2,
        zoom: 3
    });

    map.on('load', () => {
        // Add a custom vector tileset source. The tileset used in
        // this example contains a feature for every county in the U.S.
        // Each county contains four properties. For example:
        // {
        //     COUNTY: "Uintah County",
        //     FIPS: 49047,
        //     median-income: 62363,
        //     population: 34576
        // }
        map.addSource('counties', {
            'type': 'vector',
            'url': 'mapbox://mapbox.82pkq93d'
        });

        map.addLayer(
            {
                'id': 'counties',
                'type': 'fill',
                'source': 'counties',
                'source-layer': 'original',
                'paint': {
                    'fill-outline-color': 'rgba(0,0,0,0.1)',
                    'fill-color': 'rgba(0,0,0,0.1)'
                }
            },
            // Place polygons under labels, roads and buildings.
            'building'
        );

        map.addLayer(
            {
                'id': 'counties-highlighted',
                'type': 'fill',
                'source': 'counties',
                'source-layer': 'original',
                'paint': {
                    'fill-outline-color': '#484896',
                    'fill-color': '#6e599f',
                    'fill-opacity': 0.75
                },
                'filter': ['in', 'FIPS', '']
            },
            // Place polygons under labels, roads and buildings.
            'building'
        );

        map.on('click', (e) => {
            // Set `bbox` as 5px reactangle area around clicked point.
            const bbox = [
                [e.point.x - 5, e.point.y - 5],
                [e.point.x + 5, e.point.y + 5]
            ];
            // Find features intersecting the bounding box.
            const selectedFeatures = map.queryRenderedFeatures(bbox, {
                layers: ['counties']
            });
            const fips = selectedFeatures.map(
                (feature) => feature.properties.FIPS
            );
            // Set a filter matching selected features by FIPS codes
            // to activate the 'counties-highlighted' layer.
            map.setFilter('counties-highlighted', ['in', 'FIPS', ...fips]);
        });
    });
</script>

</body>
</html>

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