Add live realtime data
Use realtime GeoJSON data streams to move a symbol
on your map.
<!DOCTYPE html><html><head><meta charset="utf-8"><title>Add live realtime data</title><meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no"><link href="https://api.mapbox.com/mapbox-gl-js/v2.1.1/mapbox-gl.css" rel="stylesheet"><script src="https://api.mapbox.com/mapbox-gl-js/v2.1.1/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 access token here>';var map = new mapboxgl.Map({container: 'map',style: 'mapbox://styles/mapbox/streets-v11',zoom: 0}); var url = 'https://wanderdrone.appspot.com/';map.on('load', function () {var request = new XMLHttpRequest();window.setInterval(function () {// make a GET request to parse the GeoJSON at the urlrequest.open('GET', url, true);request.onload = function () {if (this.status >= 200 && this.status < 400) {// retrieve the JSON from the responsevar json = JSON.parse(this.response); // update the drone symbol's location on the mapmap.getSource('drone').setData(json); // fly the map to the drone's current locationmap.flyTo({center: json.geometry.coordinates,speed: 0.5});}};request.send();}, 2000); map.addSource('drone', { type: 'geojson', data: url });map.addLayer({'id': 'drone','type': 'symbol','source': 'drone','layout': {'icon-image': 'rocket-15'}});});</script> </body></html>