クリックしたポイント周囲のフィーチャを選択 | Mapbox GL JS | ドキュメント

マップをクリックして、queryRenderedFeature でフィーチャを問い合わせます。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>クリックしたポイント周囲のフィーチャを選択</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v2.6.1/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v2.6.1/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',
style: 'mapbox://styles/mapbox/streets-v11',
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)'
}
},
'settlement-label'
); // Place polygon under these labels.
 
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', '']
},
'settlement-label'
); // Place polygon under these labels.
 
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>