ズーム・レベルに応じて建物の色を変更
補間式を使用して建物レイヤーをease-inし、色から色への変化をスムーズにします。
<!DOCTYPE html><html><head><meta charset="utf-8" /><title>ズーム・レベルに応じて建物の色を変更</title><meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" /><script src="https://api.mapbox.com/mapbox-gl-js/v1.6.1/mapbox-gl.js"></script><link href="https://api.mapbox.com/mapbox-gl-js/v1.6.1/mapbox-gl.css" rel="stylesheet" /><style> body { margin: 0; padding: 0; } #map { position: absolute; top: 0; bottom: 0; width: 100%; }</style></head><body><style>#zoom {display: block;position: relative;margin: 20px 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><button id="zoom">Zoom to buildings</button><script> mapboxgl.accessToken = '<your access token here>';var map = new mapboxgl.Map({container: 'map',style: 'mapbox://styles/mapbox/streets-v11',center: [-90.73414, 14.55524],zoom: 13}); map.on('load', function() {map.setPaintProperty('building', 'fill-color', ['interpolate',['exponential', 0.5],['zoom'],15,'#e2714b',22,'#eee695']); map.setPaintProperty('building', 'fill-opacity', ['interpolate',['exponential', 0.5],['zoom'],15,0,22,1]);}); document.getElementById('zoom').addEventListener('click', function() {map.zoomTo(19, { duration: 9000 });});</script> </body></html>