Examples
Layers (31)
Display buildings in 3DExtrude polygons for 3D indoor mappingAdd a 3D modelAdjust a layer's opacityAnimate a lineAnimate a series of imagesAnimate a pointChange building color based on zoom levelChange the case of labelsDisplay HTML clusters with custom propertiesCreate and style clustersChange a layer's color with buttonsAdd a custom style layerStyle circles with a data-driven propertyStyle lines with a data-driven propertyDisplay and style rich text labelsAdd a pattern to a polygonAdd a GeoJSON lineAdd a new layer below labelsDraw GeoJSON pointsAdd a GeoJSON polygonCreate a heatmap layerCreate a gradient line using an expressionAdd multiple geometries from one GeoJSON sourceStyle ocean depth dataShow and hide layersChange worldview of administrative boundariesUpdate a choropleth layer by zoom levelVariable label placementVisualize population densityAdd hillshading

Update a feature in realtime

Change an existing feature on your map in realtime by updating its data.

Mapbox GL unsupported
Mapbox GL requires WebGL support. Please check that you are using a supported browser and that WebGL is enabled.
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>Update a feature in realtime</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v1.0.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v1.0.0/mapbox-gl.css' rel='stylesheet' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
</style>
</head>
<body>
<div id='map'></div>
<script src='//d3js.org/d3.v3.min.js' charset='utf-8'></script>
<script>
mapboxgl.accessToken = '<your access token here>';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/satellite-v9',
zoom: 0
});
map.on('load', function () {
// We use D3 to fetch the JSON here so that we can parse and use it separately
// from GL JS's use in the added source. You can use any request method (library
// or otherwise) that you want.
d3.json('https://docs.mapbox.com/mapbox-gl-js/assets/hike.geojson', function(err, data) {
if (err) throw err;
// save full coordinate list for later
var coordinates = data.features[0].geometry.coordinates;
// start by showing just the first coordinate
data.features[0].geometry.coordinates = [coordinates[0]];
// add it to the map
map.addSource('trace', { type: 'geojson', data: data });
map.addLayer({
"id": "trace",
"type": "line",
"source": "trace",
"paint": {
"line-color": "yellow",
"line-opacity": 0.75,
"line-width": 5
}
});
// setup the viewport
map.jumpTo({ 'center': coordinates[0], 'zoom': 14 });
map.setPitch(30);
// on a regular basis, add more coordinates from the saved list and update the map
var i = 0;
var timer = window.setInterval(function() {
if (i < coordinates.length) {
data.features[0].geometry.coordinates.push(coordinates[i]);
map.getSource('trace').setData(data);
map.panTo(coordinates[i]);
i++;
} else {
window.clearInterval(timer);
}
}, 10);
});
});
</script>
</body>
</html>