Style Specification

Examples

Add a generated icon to the map Add an icon to the map Display a map with a custom style Display a satellite map Change a map's style Display a map

Display buildings in 3D Extrude polygons for 3D indoor mapping Adjust a layer's opacity Animate a line Animate a series of images Animate a point Change building color based on zoom level Change the case of labels Create and style clusters Change a layer's color with buttons Add a custom style layer Style circles with a data-driven property Style lines with a data-driven property Display and style rich text labels Add a new layer below labels Add a GeoJSON line Draw GeoJSON points Add a GeoJSON polygon Create a heatmap layer Add hillshading Add multiple geometries from one GeoJSON source Style ocean depth data Show and hide layers Change worldview of administrative boundaries Update a choropleth layer by zoom level Visualize population density Create a gradient line using an expression

Join local JSON data with vector tile geometries Add an image Add live realtime data Update a feature in realtime Add a raster tile source Add a third party vector tile source Add a vector tile source Add a video Add a WMS source

User interaction (20)

Animate 3D buildings based on ambient sounds Disable map rotation Create a draggable Marker Create a draggable point Filter features within map view Filter symbols by text input Filter symbols by toggling a list Create a hover effect Display a non-interactive map Measure distances Get coordinates of the mouse pointer Highlight features containing similar data Select features around a clicked point Get features under the mouse pointer Restrict map panning to an area Create a time slider Toggle interactions Highlight features within a bounding box Fit to the bounds of a LineString Change a map's language

Animate map camera around a point Animate a point along a route Center the map on a clicked symbol Fit a map to a bounding box Slowly fly to a location Fly to a location Navigate the map with game-like controls Jump to a series of locations Play map locations as a slideshow Fly to a location based on scroll position Set pitch and bearing

Controls and overlays (17)

Animate a marker Change the default position for attribution Add custom icons with Markers Disable scroll zoom View a fullscreen map Locate the user Swipe between maps Display driving directions Show drawn polygon area Add a geocoder Add a marker using a place name Display map navigation controls Show polygon information on click Display a popup on click Display a popup on hover Display a popup Attach a popup to a marker instance

Supplement forward geocoding search results from another data source Limit geocoder results to a named region Supplement geocoding search results from another data source Place the geocoder input outside the map Bias geocoder results around the map view Set a point after Geocoder result

Browser support (1)

Check for browser support

Internationalization support (2)

Use locally generated ideographs Add support for right-to-left scripts

Create a gradient line using an expression

Use the line-gradient paint property and an expression to visualize distance from the starting point of a line.

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>Create a gradient line using an expression</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/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 = window.map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v9',
center: [-77.035, 38.875],
zoom: 12,
});
 
var geojson = {
"type": "FeatureCollection",
"features": [{
"type": "Feature",
"properties": {},
"geometry": {
"coordinates": [
[-77.044211, 38.852924 ],
[-77.045659, 38.860158 ],
[-77.044232, 38.862326 ],
[-77.040879, 38.865454 ],
[-77.039936, 38.867698 ],
[-77.040338, 38.86943 ],
[-77.04264, 38.872528 ],
[-77.03696, 38.878424 ],
[-77.032309, 38.87937 ],
[-77.030056, 38.880945 ],
[-77.027645, 38.881779 ],
[-77.026946, 38.882645 ],
[-77.026942, 38.885502 ],
[-77.028054, 38.887449 ],
[-77.02806, 38.892088 ],
[-77.03364, 38.892108 ],
[-77.033643, 38.899926 ]
],
"type": "LineString"
}
}]
};
 
map.on('load', function () {
// 'line-gradient' can only be used with GeoJSON sources
// and the source must have the 'lineMetrics' option set to true
map.addSource('line', {
type: 'geojson',
lineMetrics: true,
data: geojson
});
 
// the layer must be of type 'line'
map.addLayer({
type: 'line',
source: 'line',
id: 'line',
paint: {
'line-color': 'red',
'line-width': 14,
// 'line-gradient' must be specified using an expression
// with the special 'line-progress' property
'line-gradient': [
'interpolate',
['linear'],
['line-progress'],
0, "blue",
0.1, "royalblue",
0.3, "cyan",
0.5, "lime",
0.7, "yellow",
1, "red"
]
},
layout: {
'line-cap': 'round',
'line-join': 'round'
}
});
});
 
</script>
 
</body>
</html>