Examples
Styles (10)Add an animated icon to the mapAdd a generated icon to the mapGenerate and add a missing icon to the mapAdd an icon to the mapAdd a stretchable image to the mapDisplay a map with a custom styleRender world copiesDisplay a satellite mapChange a map's styleDisplay a mapLayers (32)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 labelsCreate and style clustersDisplay HTML clusters with custom propertiesChange 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 labelsUse a fallback imageAdd a pattern to a polygonAdd a new layer below labelsAdd a GeoJSON lineDraw GeoJSON pointsAdd a GeoJSON polygonCreate a heatmap layerAdd hillshadingCreate 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 densitySources (10)Add a canvas sourceJoin local JSON data with vector tile geometriesAdd an imageAdd live realtime dataUpdate a feature in realtimeAdd a raster tile sourceAdd a third party vector tile sourceAdd a vector tile sourceAdd a videoAdd a WMS sourceUser interaction (20)Animate 3D buildings based on ambient soundsDisable map rotationCreate a draggable MarkerCreate a draggable pointFilter features within map viewFilter symbols by text inputFilter symbols by toggling a listCreate a hover effectDisplay a non-interactive mapChange a map's languageMeasure distancesGet coordinates of the mouse pointerHighlight features containing similar dataSelect features around a clicked pointGet features under the mouse pointerRestrict map panning to an areaCreate a time sliderToggle interactionsFit to the bounds of a LineStringHighlight features within a bounding boxCamera (11)Animate map camera around a pointAnimate a point along a routeCenter the map on a clicked symbolFit a map to a bounding boxSlowly fly to a locationNavigate the map with game-like controlsJump to a series of locationsPlay map locations as a slideshowFly to a location based on scroll positionSet pitch and bearingFly to a locationControls and overlays (17)Animate a markerChange the default position for attributionAdd custom icons with MarkersDisable scroll zoomView a fullscreen mapLocate the userSwipe between mapsDisplay driving directionsShow drawn polygon areaAdd a geocoderAdd a marker using a place nameDisplay map navigation controlsShow polygon information on clickDisplay a popup on clickDisplay a popup on hoverDisplay a popupAttach a popup to a marker instanceGeocoder (8)Use a custom render function with a geocoderAccept coordinates as input to a geocoderLimit geocoder results to a named regionPlace the geocoder input outside the mapLocalize the geocoder to a given languageUse a custom camera animation with a geocoderSet a point after Geocoder resultSupplement forward geocoding search results from another data sourceBrowser support (1)Check for browser supportInternationalization support (2)Use locally generated ideographsAdd support for right-to-left scripts

Visualize population density

Using a variable binding expression to calculate and display population density.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Visualize population density</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://api.mapbox.com/mapbox-gl-js/v1.9.0/mapbox-gl.js"></script>
<link href="https://api.mapbox.com/mapbox-gl-js/v1.9.0/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>
mapboxgl.accessToken = '<your access token here>';
var map = new mapboxgl.Map({
container: 'map', // container id
style: 'mapbox://styles/mapbox/streets-v11', // stylesheet location
center: [30.0222, -1.9596], // starting position [lng, lat]
zoom: 7 // starting zoom
});
map.on('load', function() {
map.addSource('rwanda-provinces', {
'type': 'geojson',
'data':
'https://docs.mapbox.com/mapbox-gl-js/assets/rwanda-provinces.geojson'
});
map.addLayer({
'id': 'rwanda-provinces',
'type': 'fill',
'source': 'rwanda-provinces',
'layout': {},
'paint': {
'fill-color': [
'let',
'density',
['/', ['get', 'population'], ['get', 'sq-km']],
[
'interpolate',
['linear'],
['zoom'],
8,
[
'interpolate',
['linear'],
['var', 'density'],
274,
['to-color', '#edf8e9'],
1551,
['to-color', '#006d2c']
],
10,
[
'interpolate',
['linear'],
['var', 'density'],
274,
['to-color', '#eff3ff'],
1551,
['to-color', '#08519c']
]
]
],
'fill-opacity': 0.7
}
});
});
</script>
</body>
</html>
Was this example helpful?