Mapbox Style Specification¶

A Mapbox style is a document that defines the visual appearance of a map: what data to draw, the order to draw it in, and how to style the data when drawing it. A style document is a JSON object with specific root level and nested properties. This specification defines and describes these properties.

The intended audience of this quick reference includes:

Advanced designers and cartographers who want to write styles by hand
GeoTools developers using the mbstyle module
Authors of software that generates or processes Mapbox styles.
Feature support is provided for the Mapbox GL JS, the Open Layers Mapbox Style utility and the GeoTools mbstyle module.
Where appropriate examples have been changed to reference GeoWebCache.

Note

The Mapbox Style Specification is generated from the BSD Mapbox GL JS github repository, reproduced here with details on this GeoTools implementation.

Root Properties¶

Root level properties of a Mapbox style specify the map’s layers, tile sources and other resources, and default values for the initial camera position when not specified elsewhere.

{
    "version": 8,
    "name": "Mapbox Streets",
    "sprite": "sprites/streets-v8",
    "glyphs": "{fontstack}/{range}.pbf",
    "sources": {...},
    "layers": [...]
}

version¶

Required Enum.

Style specification version number. Must be 8.

"version": 8

name¶

Optional String.

A human-readable name for the style.

"name": "Bright"

metadata¶

Optional

Arbitrary properties useful to track with the stylesheet, but do not influence rendering. Properties should be prefixed to avoid collisions.

Note

unsupported.

center¶

Optional Array.

Default map center in longitude and latitude. The style center will be used only if the map has not been positioned by other means (e.g. map options or user interaction).

"center": [
  -73.9749, 40.7736
]

Note

unsupported

zoom¶

Optional Number.

Default zoom level. The style zoom will be used only if the map has not been positioned by other means (e.g. map options or user interaction).

"zoom": 12.5

bearing¶

Optional Number. Units in degrees. Defaults to 0.

Default bearing, in degrees clockwise from true north. The style bearing will be used only if the map has not been positioned by other means (e.g. map options or user interaction).

"bearing": 29

Note

unsupported

pitch¶

Optional Number. Units in degrees. Defaults to 0.

Default pitch, in degrees. Zero is perpendicular to the surface, for a look straight down at the map, while a greater value like 60 looks ahead towards the horizon. The style pitch will be used only if the map has not been positioned by other means (e.g. map options or user interaction).

"pitch": 50

light¶

The global light source.

"light": {
  "anchor": "viewport",
  "color": "white",
  "intensity": 0.4
}

sources¶

Required Sources.

Data source specifications.

"sources": {
  "mapbox-streets": {
    "type": "vector",
    "tiles": [
      "http://localhost:8080/geoserver/gwc/service/wmts?REQUEST=GetTile
          &SERVICE=WMTS&VERSION=1.0.0&LAYER=mapbox:streets&STYLE=
          &TILEMATRIX=EPSG:900913:{z}&TILEMATRIXSET=EPSG:900913
          &FORMAT=application/vnd.mapbox-vector-tile
          &TILECOL={x}&TILEROW={y}"
    ],
    "minZoom": 0,
    "maxZoom": 14
  }
}

sprite¶

Optional String.

A base URL for retrieving the sprite image and metadata. The extensions .png, .json and scale factor @2x.png will be automatically appended. This property is required if any layer uses the background-pattern, fill-pattern, line-pattern, fill-extrusion-pattern, or icon-image properties.

"sprite" : "/geoserver/styles/mark"

glyphs¶

Optional String.

A URL template for loading signed-distance-field glyph sets in PBF format. The URL must include {fontstack} and {range} tokens. This property is required if any layer uses the text-field layout property.

"glyphs": "{fontstack}/{range}.pbf"

transition¶

Required Transition.

A global transition definition to use as a default across properties.

"transition": {
  "duration": 300,
  "delay": 0
}

layers¶

Required Array.

Layers will be drawn in the order of this array.

"layers": [
  {
    "id": "water",
    "source": "sf:roads",
    "source-layer": "water",
    "type": "fill",
    "paint": {
      "fill-color": "#00ffff"
    }
  }
]

Light¶

A style’s light property provides global light source for that style.

"light": {
  "anchor": "viewport",
  "color": "white",
  "intensity": 0.4
}

anchor¶

Optional Enum. One of map, viewport. Defaults to viewport.

Whether extruded geometries are lit relative to the map or viewport.

map: The position of the light source is aligned to the rotation of the map.
viewport: The position of the light source is aligned to the rotation of the viewport.

"anchor": "map"

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	Not yet supported	Not yet supported

position¶

Optional Array. Defaults to 1.15,210,30.

Position of the light source relative to lit (extruded) geometries, in [r radial coordinate, a azimuthal angle, p polar angle] where r indicates the distance from the center of the base of an object to its light, a indicates the position of the light relative to 0° (0° when light.anchor is set to viewport corresponds to the top of the viewport, or 0° when light.anchor is set to map corresponds to due north, and degrees proceed clockwise), and p indicates the height of the light (from 0°, directly above, to 180°, directly below).

"position": [
  1.5,
  90,
  80
]

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	Not yet supported	Not yet supported

color¶

Optional Color. Defaults to #ffffff.

Color tint for lighting extruded geometries.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	Not yet supported	Not yet supported

intensity¶

Optional Number. Defaults to 0.5.

Intensity of lighting (on a scale from 0 to 1). Higher numbers will present as more extreme contrast.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	Not yet supported	Not yet supported

Sources¶

Sources supply data to be shown on the map. The type of source is specified by the "type" property, and must be one of vector, raster, geojson, image, video, canvas. Adding a source won’t immediately make data appear on the map because sources don’t contain styling details like color or width. Layers refer to a source and give it a visual representation. This makes it possible to style the same source in different ways, like differentiating between types of roads in a highways layer.

Tiled sources (vector and raster) must specify their details in terms of the TileJSON specification. This can be done in several ways:

By supplying TileJSON properties such as "tiles", "minzoom", and "maxzoom" directly in the source:

"mapbox-streets": {
  "type": "vector",
  "tiles": [
    "http://a.example.com/tiles/{z}/{x}/{y}.pbf",
    "http://b.example.com/tiles/{z}/{x}/{y}.pbf"
  ],
  "maxzoom": 14
}

By providing a "url" to a TileJSON resource:

"mapbox-streets": {
  "type": "vector",
  "url": "http://api.example.com/tilejson.json"
}

By providing a url to a WMS server that supports EPSG:3857 (or EPSG:900913) as a source of tiled data. The server url should contain a "{bbox-epsg-3857}" replacement token to supply the bbox parameter.

"wms-imagery": {
  "type": "raster",
  "tiles": [
  'http://a.example.com/wms?bbox={bbox-epsg-3857}&format=image/png&service=WMS&version=1.1.1&request=GetMap&srs=EPSG:3857&width=256&height=256&layers=example'
  ],
  "tileSize": 256
}

vector¶

A vector tile source. Tiles must be in Mapbox Vector Tile format. All geometric coordinates in vector tiles must be between -1 * extent and (extent * 2) - 1 inclusive. All layers that use a vector source must specify a "source-layer" value. For vector tiles hosted by Mapbox, the "url" value should be of the form mapbox://mapid.

"mapbox-streets": {
  "type": "vector",
  "tiles": [
    "http://localhost:8080/geoserver/gwc/service/wmts?REQUEST=GetTile&SERVICE=WMTS
        &VERSION=1.0.0&LAYER=mapbox:streets&STYLE=&TILEMATRIX=EPSG:900913:{z}
        &TILEMATRIXSET=EPSG:900913&FORMAT=application/vnd.mapbox-vector-tile
        &TILECOL={x}&TILEROW={y}"
  ],
  "minZoom": 0,
  "maxZoom": 14
}

url¶

Optional String.

A URL to a TileJSON resource. Supported protocols are http:, https:, and mapbox://<mapid>.

tiles¶

Optional Array.

An array of one or more tile source URLs, as in the TileJSON spec.

minzoom¶

Optional Number. Defaults to 0.

Minimum zoom level for which tiles are available, as in the TileJSON spec.

maxzoom¶

Optional Number. Defaults to 22.

Maximum zoom level for which tiles are available, as in the TileJSON spec. Data from tiles at the maxzoom are used when displaying the map at higher zoom levels.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0

raster¶

A raster tile source. For raster tiles hosted by Mapbox, the "url" value should be of the form mapbox://mapid.

"mapbox-satellite": {
  "type": "raster",
  "tiles": [
    "http://localhost:8080/geoserver/gwc/service/wmts?REQUEST=GetTile&SERVICE=WMTS
        &VERSION=1.0.0&LAYER=mapbox:satellite&STYLE=&TILEMATRIX=EPSG:900913:{z}
        &TILEMATRIXSET=EPSG:900913&FORMAT=image/png&TILECOL={x}&TILEROW={y}"
  ],
  "minzoom": 0,
  "maxzoom": 14
}

url¶

Optional String.

A URL to a TileJSON resource. Supported protocols are http:, https:, and mapbox://<mapid>.

tiles¶

Optional Array.

An array of one or more tile source URLs, as in the TileJSON spec.

minzoom¶

Optional Number. Defaults to 0.

Minimum zoom level for which tiles are available, as in the TileJSON spec.

maxzoom¶

Optional Number. Defaults to 22.

Maximum zoom level for which tiles are available, as in the TileJSON spec. Data from tiles at the maxzoom are used when displaying the map at higher zoom levels.

tileSize¶

Optional Number. Defaults to 512.

The minimum visual size to display tiles for this layer. Only configurable for raster layers.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0

geojson¶

A GeoJSON source. Data must be provided via a "data" property, whose value can be a URL or inline GeoJSON.

"geojson-marker": {
  "type": "geojson",
  "data": {
    "type": "Feature",
    "geometry": {
      "type": "Point",
      "coordinates": [-77.0323, 38.9131]
    },
    "properties": {
      "title": "Mapbox DC",
      "marker-symbol": "monument"
    }
  }
}

This example of a GeoJSON source refers to an external GeoJSON document via its URL. The GeoJSON document must be on the same domain or accessible using CORS.

"geojson-lines": {
  "type": "geojson",
  "data": "./lines.geojson"
}

data¶

Optional

A URL to a GeoJSON file, or inline GeoJSON.

maxzoom¶

Optional Number. Defaults to 18.

Maximum zoom level at which to create vector tiles (higher means greater detail at high zoom levels).

buffer¶

Optional Number. Defaults to 128.

Size of the tile buffer on each side. A value of 0 produces no buffer. A value of 512 produces a buffer as wide as the tile itself. Larger values produce fewer rendering artifacts near tile edges and slower performance.

tolerance¶

Optional Number. Defaults to 0.375.

Douglas-Peucker simplification tolerance (higher means simpler geometries and faster performance).

cluster¶

Optional Boolean. Defaults to false.

If the data is a collection of point features, setting this to true clusters the points by radius into groups.

clusterRadius¶

Optional Number. Defaults to 50.

Radius of each cluster if clustering is enabled. A value of 512 indicates a radius equal to the width of a tile.

clusterMaxZoom¶

Optional Number.

Max zoom on which to cluster points if clustering is enabled. Defaults to one zoom less than maxzoom (so that last zoom features are not clustered).

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0
clustering	>= 0.14.0	Not yet supported	Not yet supported

image¶

An image source. The "url" value contains the image location.

The "coordinates" array contains [longitude, latitude] pairs for the image corners listed in clockwise order: top left, top right, bottom right, bottom left.

"image": {
  "type": "image",
  "url": "/mapbox-gl-js/assets/radar.gif",
  "coordinates": [
      [-80.425, 46.437],
      [-71.516, 46.437],
      [-71.516, 37.936],
      [-80.425, 37.936]
  ]
}

url¶

Required String.

URL that points to an image.

coordinates¶

Required Array.

Corners of image specified in longitude, latitude pairs.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported

video¶

A video source. The "urls" value is an array. For each URL in the array, a video element source will be created, in order to support same media in multiple formats supported by different browsers.

The "coordinates" array contains [longitude, latitude] pairs for the video corners listed in clockwise order: top left, top right, bottom right, bottom left.

"video": {
  "type": "video",
  "urls": [
    "https://www.mapbox.com/drone/video/drone.mp4",
    "https://www.mapbox.com/drone/video/drone.webm"
  ],
  "coordinates": [
     [-122.51596391201019, 37.56238816766053],
     [-122.51467645168304, 37.56410183312965],
     [-122.51309394836426, 37.563391708549425],
     [-122.51423120498657, 37.56161849366671]
  ]
}

urls¶

Required Array.

URLs to video content in order of preferred format.

coordinates¶

Required Array.

Corners of video specified in longitude, latitude pairs.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported

canvas¶

A canvas source. The "canvas" value is the ID of the canvas element in the document.

The "coordinates" array contains [longitude, latitude] pairs for the video corners listed in clockwise order: top left, top right, bottom right, bottom left.

If an HTML document contains a canvas such as this:

<canvas id="mycanvas" width="400" height="300" style="display: none;"></canvas>

the corresponding canvas source would be specified as follows:

"canvas": {
  "type": "canvas",
  "canvas": "mycanvas",
  "coordinates": [
     [-122.51596391201019, 37.56238816766053],
     [-122.51467645168304, 37.56410183312965],
     [-122.51309394836426, 37.563391708549425],
     [-122.51423120498657, 37.56161849366671]
  ]
}

coordinates¶

Required Array.

Corners of canvas specified in longitude, latitude pairs.

animate¶

Whether the canvas source is animated. If the canvas is static, animate should be set to false to improve performance.

canvas¶

Required String.

HTML ID of the canvas from which to read pixels.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.32.0	Not yet supported	Not yet yupported

Sprite¶

A style’s sprite property supplies a URL template for loading small images to use in rendering background-pattern, fill-pattern, line-pattern, and icon-image style properties.

"sprite" : "/geoserver/styles/mark"

A valid sprite source must supply two types of files:

An index file, which is a JSON document containing a description of each image contained in the sprite. The content of this file must be a JSON object whose keys form identifiers to be used as the values of the above style properties, and whose values are objects describing the dimensions (width and height properties) and pixel ratio (pixelRatio) of the image and its location within the sprite (x and y). For example, a sprite containing a single image might have the following index file contents:
```
{
  "poi": {
    "width": 32,
    "height": 32,
    "x": 0,
    "y": 0,
    "pixelRatio": 1
  }
}
```
Then the style could refer to this sprite image by creating a symbol layer with the layout property "icon-image": "poi", or with the tokenized value "icon-image": "{icon}" and vector tile features with a icon property with the value poi.
Image files, which are PNG images containing the sprite data.

Mapbox SDKs will use the value of the sprite property in the style to generate the URLs for loading both files. First, for both file types, it will append @2x to the URL on high-DPI devices. Second, it will append a file extension: .json for the index file, and .png for the image file. For example, if you specified "sprite": "https://example.com/sprite", renderers would load https://example.com/sprite.json and https://example.com/sprite.png, or https://example.com/sprite@2x.json and https://example.com/sprite@2x.png.

If you are using Mapbox Studio, you will use prebuilt sprites provided by Mapbox, or you can upload custom SVG images to build your own sprite. In either case, the sprite will be built automatically and supplied by Mapbox APIs. If you want to build a sprite by hand and self-host the files, you can use spritezero-cli, a command line utility that builds Mapbox GL compatible sprite PNGs and index files from a directory of SVGs.

Glyphs¶

A style’s glyphs property provides a URL template for loading signed-distance-field glyph sets in PBF format.

"glyphs": "{fontstack}/{range}.pbf"

This URL template should include two tokens:

{fontstack} When requesting glyphs, this token is replaced with a comma separated list of fonts from a font stack specified in the `text-font <#layout-symbol-text-font>`__ property of a symbol layer.
{range} When requesting glyphs, this token is replaced with a range of 256 Unicode code points. For example, to load glyphs for the Unicode Basic Latin and Basic Latin-1 Supplement blocks, the range would be 0-255. The actual ranges that are loaded are determined at runtime based on what text needs to be displayed.

Transition¶

A style’s transition property provides global transition defaults for that style.

"transition": {
  "duration": 300,
  "delay": 0
}

duration¶

Optional Number. Units in milliseconds. Defaults to 300.

Time allotted for transitions to complete.

delay¶

Optional Number. Units in milliseconds. Defaults to 0.

Length of time before a transition begins.

Layers¶

A style’s layers property lists all of the layers available in that style. The type of layer is specified by the "type" property, and must be one of background, fill, line, symbol, raster, circle, fill-extrusion.

Except for layers of the background type, each layer needs to refer to a source. Layers take the data that they get from a source, optionally filter features, and then define how those features are styled.

"layers": [
  {
    "id": "water",
    "source": "sf:roads",
    "source-layer": "water",
    "type": "fill",
    "paint": {
      "fill-color": "#00ffff"
    }
  }
]

Layer Properties¶

id¶

Required String.

Unique layer name.

type¶

Optional Enum. One of fill, line, symbol, circle, fill-extrusion, raster, background.

Rendering type of this layer.

fill: A filled polygon with an optional stroked border.
line: A stroked line.
symbol: An icon or a text label.
circle: A filled circle.
fill-extrusion: An extruded (3D) polygon.
raster: Raster map textures such as satellite imagery.
background: The background color or pattern of the map.

metadata¶

Optional

Arbitrary properties useful to track with the layer, but do not influence rendering. Properties should be prefixed to avoid collisions, like ‘mapbox:’.

source¶

Optional String.

Name of a source description to be used for this layer.

source-layer¶

Optional String.

Layer to use from a vector tile source. Required if the source supports multiple layers.

minzoom¶

Optional Number.

The minimum zoom level on which the layer gets parsed and appears on.

maxzoom¶

Optional Number.

The maximum zoom level on which the layer gets parsed and appears on.

filter¶

Optional Expression.

A expression specifying conditions on source features. Only features that match the filter are displayed.

layout¶

layout properties for the layer

paint¶

Optional paint properties for the layer

Layers have two sub-properties that determine how data from that layer is rendered: layout and paint properties.

Layout properties appear in the layer’s "layout" object. They are applied early in the rendering process and define how data for that layer is passed to the GPU. For efficiency, a layer can share layout properties with another layer via the "ref" layer property, and should do so where possible. This will decrease processing time and allow the two layers will share GPU memory and other resources associated with the layer.

Paint properties are applied later in the rendering process. A layer that shares layout properties with another layer can have independent paint properties. Paint properties appear in the layer’s "paint" object.

background¶

Layout Properties¶

visibility¶

Optional Enum. One of visible, none, Defaults to visible.

Whether this layer is displayed.

visible: The layer is shown.
none: The layer is not shown.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0

Paint Properties¶

background-color¶

Optional Color. Defaults to #000000. Disabled by background-pattern.

The color with which the background will be drawn.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0

background-pattern¶

Optional String.

Name of image in sprite to use for drawing an image background. For seamless patterns, image width and height must be a factor of two (2, 4, 8, …, 512).

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported

background-opacity¶

Optional Number. Defaults to 1.

The opacity at which the background will be drawn.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0

fill¶

Layout Properties¶

visibility¶

Optional Enum. One of visible, none. Defaults to visible.

Whether this layer is displayed.

visible: The layer is shown.
none: The layer is not shown.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0

Paint Properties¶

fill-antialias¶

Optional Boolean. Defaults to true.

Whether or not the fill should be antialiased.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

fill-opacity¶

Optional Number. Defaults to 1.

The opacity of the entire fill layer. In contrast to the fill-color, this value will also affect the 1px stroke around the fill, if the stroke is used.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.21.0	>= 17.1	>= 2.4.0

fill-color¶

Optional Color. Defaults to #000000. Disabled by fill-pattern.

The color of the filled part of this layer. This color can be specified as rgba with an alpha component and the color’s opacity will not affect the opacity of the 1px stroke, if it is used.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.19.0	>= 17.1	>= 2.4.0

fill-outline-color¶

Optional Color. Disabled by fill-pattern. Requires fill-antialias = true.

The outline color of the fill. Matches the value of fill-color if unspecified.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.19.0	>= 17.1	>= 2.4.0

fill-translate¶

Optional Array. Units in pixels. Defaults to 0.0.

The geometry’s offset. Values are [x, y] where negatives indicate left and up, respectively.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

fill-translate-anchor¶

Optional Enum. One of map, viewport. Defaults to map. Requires fill-translate.

Controls the translation reference point.

map: The fill is translated relative to the map.
viewport: The fill is translated relative to the viewport.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

fill-pattern¶

Optional String.

Name of image in sprite to use for drawing image fills. For seamless patterns, image width and height must be a factor of two (2, 4, 8, …, 512).

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	Not yet supported
data-driven styling	Not yet supported	>= 17.1	Not yet supported

line¶

Layout Properties¶

line-cap¶

Optional Enum. One of butt, round, square. Defaults to butt.

The display of line endings.

butt: A cap with a squared-off end which is drawn to the exact endpoint of the line.
round: A cap with a rounded end which is drawn beyond the endpoint of the line at a radius of one-half of the line’s width and centered on the endpoint of the line.
square: A cap with a squared-off end which is drawn beyond the endpoint of the line at a distance of one-half of the line’s width.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	Not yet supported	>= 17.1	>= 2.4.0

line-join¶

Optional Enum. One of bevel, round, miter. Defaults to miter.

The display of lines when joining.

bevel: A join with a squared-off end which is drawn beyond the endpoint of the line at a distance of one-half of the line’s width.
round: A join with a rounded end which is drawn beyond the endpoint of the line at a radius of one-half of the line’s width and centered on the endpoint of the line.
miter: A join with a sharp, angled corner which is drawn with the outer sides beyond the endpoint of the path until they meet.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	Not yet supported	>= 17.1	>= 2.4.0

line-miter-limit¶

Optional Number. Defaults to 2. Requires line-join = miter.

Used to automatically convert miter joins to bevel joins for sharp angles.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0
data-driven styling	Not yet supported	Not yet supported	>= 2.4.0

line-round-limit¶

Optional Number. Defaults to 1.05. Requires line-join = round.

Used to automatically convert round joins to miter joins for shallow angles.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

visibility¶

Optional Enum. One of visible, none. Defaults to visible.

Whether this layer is displayed.

visible: The layer is shown.
none: The layer is not shown.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	Not yet supported	>= 17.1	>= 2.4.0

Paint Properties¶

line-opacity¶

Optional Number. Defaults to 1.

The opacity at which the line will be drawn.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.29.0	>= 17.1	>= 2.4.0

line-color¶

Optional Color. Defaults to #000000. Disabled by line-pattern.

The color with which the line will be drawn.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.23.0	>= 17.1	>= 2.4.0

line-translate¶

Optional Array. Units in pixels. Defaults to 0.0.

The geometry’s offset. Values are [x, y] where negatives indicate left and up, respectively.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

line-translate-anchor¶

Optional Enum. One of map, viewport. Defaults to map. Requires line-translate.

Controls the translation reference point.

map: The line is translated relative to the map.
viewport: The line is translated relative to the viewport.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

line-width¶

Optional Number. Units in pixels. Defaults to 1.

Stroke thickness.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	Not yet supported	>= 17.1	>= 2.4.0

line-gap-width¶

Optional Number. Units in pixels. Defaults to 0.

Draws a line casing outside of a line’s actual path. Value indicates the width of the inner gap.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	>= 0.29.0	Not yet supported	Not yet supported

line-offset¶

Optional Number. Units in pixels. Defaults to 0.

The line’s offset. For linear features, a positive value offsets the line to the right, relative to the direction of the line, and a negative value to the left. For polygon features, a positive value results in an inset, and a negative value results in an outset.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.12.1	>= 17.1	Not yet supported
data-driven styling	>= 0.29.0	>= 17.1	Not yet supported

line-blur¶

Optional Number. Units in pixels. Defaults to 0.

Blur applied to the line, in pixels.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	>= 0.29.0	Not yet supported	Not yet supported

line-dasharray¶

Optional Array. Units in line widths. Disabled by line-pattern.

Specifies the lengths of the alternating dashes and gaps that form the dash pattern. The lengths are later scaled by the line width. To convert a dash length to pixels, multiply the length by the current line width.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	Not yet supported	>= 17.1	>= 2.4.0

line-pattern¶

Optional String.

Name of image in sprite to use for drawing image lines. For seamless patterns, image width must be a factor of two (2, 4, 8, …, 512).

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	Not yet supported
data-driven styling	Not yet supported	>= 17.1	Not yet supported

symbol¶

Layout Properties¶

symbol-placement¶

Optional Enum. One of point, line. Defaults to point.

Label placement relative to its geometry.

point: The label is placed at the point where the geometry is located.
line: The label is placed along the line of the geometry. Can only be used on LineString and Polygon geometries.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.10.0
data-driven styling	Not yet supported	>= 17.1	>= 2.10.0

symbol-spacing¶

Optional Number. Units in pixels. Defaults to 250. Requires symbol-placement = line.

Distance between two symbol anchors.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

symbol-avoid-edges¶

Optional Boolean. Defaults to false.

If true, the symbols will not cross tile edges to avoid mutual collisions. Recommended in layers that don’t have enough padding in the vector tile to prevent collisions, or if it is a point symbol layer placed after a line symbol layer.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-allow-overlap¶

Optional Boolean. Defaults to false. Requires icon-image.

If true, the icon will be visible even if it collides with other previously drawn symbols.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-ignore-placement¶

Optional Boolean. Defaults to false. Requires icon-image.

If true, other symbols can be visible even if they collide with the icon.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-optional¶

Optional Boolean. Defaults to false. <Requires icon-image, text-field.

If true, text will display without their corresponding icons when the icon collides with other symbols and the text does not.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-rotation-alignment¶

Optional Enum. One of map, viewport, auto. Defaults to auto. Requires icon-image.

In combination with symbol-placement, determines the rotation behavior of icons.

map: When symbol-placement is set to point, aligns icons east-west. When symbol-placement is set to line, aligns icon x-axes with the line.
viewport: Produces icons whose x-axes are aligned with the x-axis of the viewport, regardless of the value of symbol-placement.
auto: When symbol-placement is set to point, this is equivalent to viewport. When symbol-placement is set to line, this is equivalent to map.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
`auto` value	>= 0.25.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-size¶

Optional Number. Defaults to 1. Requires icon-image. Scale factor for icon. 1 is original size, 3 triples the size.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0
data-driven styling	>= 0.35.0	Not yet supported	>= 2.4.0

icon-text-fit¶

Optional Enum. One of none, width, height, both. Defaults to none. Requires icon-image, text-field.

Scales the icon to fit around the associated text.

none: The icon is displayed at its intrinsic aspect ratio.
width: The icon is scaled in the x-dimension to fit the width of the text.
height: The icon is scaled in the y-dimension to fit the height of the text.
both: The icon is scaled in both x- and y-dimensions.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.21.0	>= 17.1	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-text-fit-padding¶

Optional :ref:`types-array`. *Units in pixels. Defaults to 0,0,0,0. Requires icon-image, text-field, icon-text-fit = one of both, width, height.

Size of the additional area added to dimensions determined by icon-text-fit, in clockwise order: top, right, bottom, left.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.21.0	>= 17.1	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-image¶

Optional String.

Name of image in sprite to use for drawing an image background. A string with {tokens} replaced, referencing the data property to pull from.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	Not yet supported	>= 17.1	>= 2.4.0

icon-rotate¶

Optional Number. Units in degrees. Defaults to 0. Requires icon-image.

Rotates the icon clockwise.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.21.0	>= 17.1	>= 2.4.0

icon-padding¶

Optional Number. Units in pixels. Defaults to 2. Requires icon-image.

Size of the additional area around the icon bounding box used for detecting symbol collisions.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-keep-upright¶

Optional Boolean. Defaults to false. Requires icon-image, icon-rotation-alignment = map, symbol-placement = line.

If true, the icon may be flipped to prevent it from being rendered upside-down.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-offset¶

Optional Array. Defaults to 0,0. Requires icon-image.

Offset distance of icon from its anchor. Positive values indicate right and down, while negative values indicate left and up. When combined with icon-rotate the offset will be as if the rotated direction was up.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= Not yet supported	Not yet supported
data-driven styling	>= 0.29.0	>= Not yet supported	Not yet supported

text-pitch-alignment¶

Optional Enum One of map, viewport, auto. Defaults to auto. Requires text-field.

Orientation of text when map is pitched.

map: The text is aligned to the plane of the map.
viewport: The text is aligned to the plane of the viewport.
auto: Automatically matches the value of text-rotation-alignment.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
`auto` value	>= 0.25.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-rotation-alignment¶

Optional Enum. One of map, viewport, auto. Defaults to auto. Requires text-field.

In combination with symbol-placement, determines the rotation behavior of the individual glyphs forming the text.

map: When symbol-placement is set to point, aligns text east-west. When symbol-placement is set to line, aligns text x-axes with the line.
viewport: Produces glyphs whose x-axes are aligned with the x-axis of the viewport, regardless of the value of symbol-placement.
auto: When symbol-placement is set to point, this is equivalent to viewport. When symbol-placement is set to line, this is equivalent to map.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
`auto` value	>= 0.25.0	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-field¶

Optional String.

Value to use for a text label. Feature properties are specified using tokens like {field_name}. (Token replacement is only supported for literal text-field values–not for property functions.)

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.33.0	>= 17.1	>= 2.4.0

text-font¶

Optional Array. Defaults to Open Sans Regular,Arial Unicode MS Regular. Requires text-field.

Font stack to use for displaying text.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	Not yet supported	Not yet supported	>= 2.4.0

text-size¶

Optional Number. Units in pixels. Defaults to 16. Requires text-field.

Font size.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.35.0	>= 17.1	>= 2.4.0

text-max-width¶

Optional Number. Units in pixels. Defaults to 10. Requires text-field.

The maximum line width for text wrapping.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0
data-driven styling	Not yet supported	Not yet supported	>= 2.4.0

text-line-height¶

Optional Number. Units in ems. Defaults to 1.2. Requires text-field.

Text leading value for multi-line text.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-letter-spacing¶

Optional Number. Units in ems. Defaults to 0. Requires text-field.

Text tracking amount.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-justify¶

Optional Enum. One of left, center, right. Defaults to center. Requires text-field.

Text justification options.

left: The text is aligned to the left.
center: The text is centered.
right: The text is aligned to the right.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-anchor¶

Optional Enum. One of center, left, right, top, bottom, top-left, top-right, bottom-left, bottom-right. Defaults to center. Requires text-field.

Part of the text placed closest to the anchor.

center: The center of the text is placed closest to the anchor.
left: The left side of the text is placed closest to the anchor.
right: The right side of the text is placed closest to the anchor.
top: The top of the text is placed closest to the anchor.
bottom: The bottom of the text is placed closest to the anchor.
top-left: The top left corner of the text is placed closest to the anchor.
top-right: The top right corner of the text is placed closest to the anchor.
bottom-left: The bottom left corner of the text is placed closest to the anchor.
bottom-right: The bottom right corner of the text is placed closest to the anchor.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0
data-driven styling	Not yet supported	Not yet supported	>= 2.4.0

text-max-angle¶

Optional Number. Units in degrees. Defaults to 45. Requires text-field, symbol-placement = line.

Maximum angle change between adjacent characters.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.10.0
data-driven styling	Not yet supported	Not yet supported	>= 2.10.0

text-rotate¶

Optional Number. Units in degrees. Defaults to 0. Requires text-field.

Rotates the text clockwise.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.10.0
data-driven styling	>= 0.35.0	Not yet supported	>= 2.10.0

text-padding¶

Optional Number. Units in pixels. Defaults to 2. Requires text-field.

Size of the additional area around the text bounding box used for detecting symbol collisions.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-keep-upright¶

Optional Boolean. Defaults to true. Requires text-field, text-rotation-alignment = true, symbol-placement = true.

If true, the text may be flipped vertically to prevent it from being rendered upside-down.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-transform¶

Optional Enum. One of none, uppercase, lowercase. Defaults to none. Requires text-field.

Specifies how to capitalize text, similar to the CSS text-transform property.

none: The text is not altered.
uppercase: Forces all letters to be displayed in uppercase.
lowercase: Forces all letters to be displayed in lowercase.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0
data-driven styling	>= 0.33.0	Not yet supported	>= 2.4.0

text-offset¶

Optional Array. Units in pixels. Defaults to 0,0. Requires icon-image.

Offset distance of text from its anchor. Positive values indicate right and down, while negative values indicate left and up.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.4.0
data-driven styling	>= 0.35.0	Not yet supported	>= 2.4.0

text-allow-overlap¶

Optional Boolean. Defaults to false. Requires text-field.

If true, the text will be visible even if it collides with other previously drawn symbols.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-ignore-placement¶

Optional Boolean. Defaults to false. Requires text-field

If true, other symbols can be visible even if they collide with the text.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-optional¶

Optional Boolean. Defaults to false. Requires text-field, icon-image.

If true, icons will display without their corresponding text when the text collides with other symbols and the icon does not.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

visibility¶

Optional Enum. One of visible, none. Defaults to visible.

Whether this layer is displayed.

visible: The layer is shown.
none: The layer is not shown.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	Not yet supported	>= 17.1	>= 2.4.0

Paint Properties¶

icon-opacity¶

Optional Number. Defaults to 1. <i>Requires </i>icon-image.

The opacity at which the icon will be drawn.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.33.0	>= 17.1	>= 2.4.0

icon-color¶

Optional Color. Defaults to #000000. Requires icon-image.

The color of the icon. This can only be used with sdf icons.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	>= 2.10.0
data-driven styling	>= 0.33.0	Not yet supported	>= 2.10.0

icon-halo-color¶

Optional Color. Defaults to rgba(0, 0, 0, 0). Requires icon-image.

The color of the icon’s halo. Icon halos can only be used with SDF icons.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	>= 0.33.0	Not yet supported	Not yet supported

icon-halo-width¶

Optional Number. Units in pixels. Defaults to 0. Requires icon-image.

Distance of halo to the icon outline.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	>= 0.33.0	Not yet supported	Not yet supported

icon-halo-blur¶

Optional Number. Units in pixels. Defaults to 0. Requires icon-image.

Fade out the halo towards the outside.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	>= 0.33.0	Not yet supported	Not yet supported

icon-translate¶

Optional Array. Units in pixels. Defaults to 0,0. Requires icon-image.

Distance that the icon’s anchor is moved from its original placement. Positive values indicate right and down, while negative values indicate left and up.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

icon-translate-anchor¶

Optional Enum One of map, viewport. Defaults to map. Requires icon-image, icon-translate.

Controls the translation reference point.

map: Icons are translated relative to the map.
viewport: Icons are translated relative to the viewport.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-opacity¶

Optional Number. Defaults to 1. <i>Requires </i>text-field.

The opacity at which the text will be drawn.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	Not yet supported
data-driven styling	>= 0.33.0	>= 17.1	Not yet supported

text-color¶

Optional Color. Defaults to #000000. Requires text-field.

The color with which the text will be drawn.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.33.0	>= 17.1	>= 2.4.0

text-halo-color¶

Optional Color. Defaults to rgba(0, 0, 0, 0). Requires text-field.

The color of the text’s halo, which helps it stand out from backgrounds.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.33.0	>= 17.1	>= 2.4.0

text-halo-width¶

Optional Number. Units in pixels. Defaults to 0. Requires text-field.

Distance of halo to the font outline. Max text halo width is 1/4 of the font-size.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.33.0	>= 17.1	>= 2.4.0

text-halo-blur¶

Optional Number. Units in pixels. Defaults to 0. Requires text-field.

The halo’s fadeout distance towards the outside.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	>= 0.33.0	Not yet supported	Not yet supported

text-translate¶

Optional Array. Units in pixels. Defaults to 0,0. Requires text-field.

Distance that the text’s anchor is moved from its original placement. Positive values indicate right and down, while negative values indicate left and up.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

text-translate-anchor¶

Optional Enum One of map, viewport. Defaults to map. Requires text-field, text-translate.

Controls the translation reference point.

map: The text is translated relative to the map.
viewport: The text is translated relative to the viewport.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

raster¶

Layout Properties¶

visibility¶

Optional Enum. One of visible, none. Defaults to visible.

Whether this layer is displayed.

visible: The layer is shown.
none: The layer is not shown.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	Not yet supported
data-driven styling	Not yet supported	>= 17.1	Not yet supported

Paint Properties¶

raster-opacity¶

Optional Number. Defaults to 1.

The opacity at which the image will be drawn.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	Not yet supported
data-driven styling	Not yet supported	>= 17.1	Not yet supported

raster-hue-rotate

Optional Number. Units in degrees. Defaults to 0.

Rotates hues around the color wheel.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

raster-brightness-min¶

Optional Number. Defaults to 0.

Increase or reduce the brightness of the image. The value is the minimum brightness.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

raster-brightness-max¶

Optional Number. Defaults to 1.

Increase or reduce the brightness of the image. The value is the maximum brightness.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

raster-saturation¶

Optional Number. Defaults to 0.

Increase or reduce the saturation of the image.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

raster-contrast¶

Optional Number. Defaults to 0.

Increase or reduce the contrast of the image.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

raster-fade-duration¶

Optional Number Units in milliseconds. Defaults to 300.

Fade duration when a new tile is added.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

circle¶

Layout Properties¶

visibility¶

Optional Enum. One of visible, none. Defaults to visible.

Whether this layer is displayed.

visible: The layer is shown.
none: The layer is not shown.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0

Paint Properties¶

circle-radius¶

Optional Number. Units in pixels. Defaults to 5.

Circle radius.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.18.0	>= 17.1	>= 2.4.0

circle-color¶

Optional Color. Defaults to #000000.

The fill color of the circle.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.18.0	>= 17.1	>= 2.4.0

circle-blur¶

Optional Number. Defaults to 0.

Amount to blur the circle. 1 blurs the circle such that only the centerpoint is full opacity.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	>= 0.20.0	Not yet supported	Not yet supported

circle-opacity¶

Optional Number. Defaults to 1.

The opacity at which the circle will be drawn.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.10.0
data-driven styling	>= 0.20.0	>= 17.1	>= 2.10.0

circle-translate¶

Optional Array. Units in pixels. Defaults to 0,0.

The geometry’s offset. Values are [x, y] where negatives indicate left and up, respectively.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	Not yet supported
data-driven styling	Not yet supported	>= 17.1	Not yet supported

circle-translate-anchor¶

Optional Enum One of map, viewport. Defaults to map. Requires circle-translate.

Controls the translation reference point.

map: The circle is translated relative to the map.
viewport: The circle is translated relative to the viewport.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

circle-pitch-scale¶

Optional Enum One of map, viewport. Defaults to map.

Controls the scaling behavior of the circle when the map is pitched.

map: Circles are scaled according to their apparent distance to the camera.
viewport: Circles are not scaled.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.21.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

circle-stroke-width¶

Optional Number. Units in pixels. Defaults to 5.

The width of the circle’s stroke. Strokes are placed outside of the circle-radius.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.29.0	>= 17.1	>= 2.10.0
data-driven styling	>= 0.29.0	>= 17.1	>= 2.10.0

circle-stroke-color¶

Optional Color. Defaults to #000000.

The stroke color of the circle.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.29.0	>= 17.1	>= 2.4.0
data-driven styling	>= 0.29.0	>= 17.1	>= 2.4.0

circle-stroke-opacity¶

Optional Number. Defaults to 1.

The opacity of the circle’s stroke.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.29.0	>= 17.1	Not yet supported
data-driven styling	>= 0.29.0	>= 17.1	Not yet supported

fill-extrusion¶

Layout Properties¶

visibility¶

Optional Enum. One of visible, none. Defaults to visible.

Whether this layer is displayed.

visible: The layer is shown.
none: The layer is not shown.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	>= 17.1	Not yet supported

Paint Properties¶

fill-extrusion-opacity¶

Optional Number. Defaults to 1.

The opacity of the entire fill extrusion layer. This is rendered on a per-layer, not per-feature, basis, and data-driven styling is not available.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	>= 17.1	Not yet supported

fill-extrusion-color¶

Optional Color. Defaults to #000000. Disabled by fill-extrusion-pattern.

The base color of the extruded fill. The extrusion’s surfaces will be shaded differently based on this color in combination with the root light settings. If this color is specified as rgba with an alpha component, the alpha component will be ignored; use fill-extrusion-opacity to set layer opacity.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	>= 17.1	Not yet supported

fill-extrusion-translate¶

Optional Array. Units in pixels. Defaults to 0,0.

The geometry’s offset. Values are [x, y] where negatives indicate left and up (on the flat plane), respectively.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

Optional Enum One of map, viewport. Defaults to map. Requires fill-extrusion-translate.

Controls the translation reference point.

map: The fill extrusion is translated relative to the map.
viewport: The fill extrusion is translated relative to the viewport.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

fill-extrusion-pattern¶

Optional String.

Name of image in sprite to use for drawing images on extruded fills. For seamless patterns, image width and height must be a factor of two (2, 4, 8, …, 512).

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	Not yet supported	Not yet supported
data-driven styling	Not yet supported	Not yet supported	Not yet supported

fill-extrusion-height¶

Optional Number Units in meters. Defaults to 0.

The height with which to extrude this layer.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	Not yet supported	Not yet supported
data-driven styling	>= 0.27.0	Not yet supported	Not yet supported

fill-extrusion-base¶

Optional Number Units in meters. Defaults to 0. Requires fill-extrusion-height.

The height with which to extrude the base of this layer. Must be less than or equal to fill-extrusion-height.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.27.0	Not yet supported	Not yet supported
data-driven styling	>= 0.27.0	Not yet supported	Not yet supported

Types¶

A Mapbox style contains values of various types, most commonly as values for the style properties of a layer.

Color¶

Colors are written as JSON strings in a variety of permitted formats: HTML-style hex values, rgb, rgba, hsl, and hsla. Predefined HTML colors names, like yellow and blue, are also permitted.

{
  "line-color": "#ff0",
  "line-color": "#ffff00",
  "line-color": "rgb(255, 255, 0)",
  "line-color": "rgba(255, 255, 0, 1)",
  "line-color": "hsl(100, 50%, 50%)",
  "line-color": "hsla(100, 50%, 50%, 1)",
  "line-color": "yellow"
}

Especially of note is the support for hsl, which can be easier to reason about than rgb().

Enum¶

One of a fixed list of string values. Use quotes around values.

{
  "text-transform": "uppercase"
}

String¶

A string is basically just text. In Mapbox styles, you’re going to put it in quotes. Strings can be anything, though pay attention to the case of text-field - it actually will refer to features, which you refer to by putting them in curly braces, as seen in the example below.

{
  "text-field": "{MY_FIELD}"
}

Boolean¶

Boolean means yes or no, so it accepts the values true or false.

{
  "fill-enabled": true
}

Number¶

A number value, often an integer or floating point (decimal number). Written without quotes.

{
  "text-size": 24
}

Array¶

Arrays are comma-separated lists of one or more numbers in a specific order. For example, they’re used in line dash arrays, in which the numbers specify intervals of line, break, and line again.

{
  "line-dasharray": [2, 4]
}

Expressions¶

The value for any layout property, paint property, or filter may be specified as an expression. An expression defines a formula for computing the value of the property using the operators described below. The set of expression operators provided by Mapbox GL includes:

Mathematical operators for performing arithmetic and other operations on numeric values
Logical operators for manipulating boolean values and making conditional decisions
String operators for manipulating strings
Data operators, providing access to the properties of source features
Camera operators, providing access to the parameters defining the current map view

Expressions are represented as JSON arrays. The first element of an expression array is a string naming the expression operator, e.g. "*" or "case". Subsequent elements (if any) are the arguments to the expression. Each argument is either a literal value (a string, number, boolean, or null), or another expression array.

[expression_name, argument_0, argument_1, …]

Data expressions

A data expression is any expression that access feature data – that is, any expression that uses one of the data operators: get, has, id, geometry-type, properties, or feature-state. Data expressions allow a feature’s properties or state to determine its appearance. They can be used to differentiate features within the same layer and to create data visualizations.

{
    "circle-color": [
        "rgb",
        // red is higher when feature.properties.temperature is higher
        ["get", "temperature"],
        // green is always zero
        0,
        // blue is higher when feature.properties.temperature is lower
        ["-", 100, ["get", "temperature"]]
    ]
}

This example uses the get operator to obtain the temperature value of each feature. That value is used to compute arguments to the rgb operator, defining a color in terms of its red, green, and blue components.

Data expressions are allowed as the value of the filter property, and as values for most paint and layout properties. However, some paint and layout properties do not yet support data expressions. The level of support is indicated by the “data-driven styling” row of the “SDK Support” table for each property. Data expressions with the feature-state operator are allowed only on paint properties.

Camera expressions

A camera expression is any expression that uses the zoom operator. Such expressions allow the the appearance of a layer to change with the map’s zoom level. Camera expressions can be used to create the appearance of depth and to control data density.

{
    "circle-radius": [
        "interpolate", ["linear"], ["zoom"],
        // zoom is 5 (or less) -> circle radius will be 1px
        5, 1,
        // zoom is 10 (or greater) -> circle radius will be 5px
        10, 5
    ]
}

This example uses the interpolate operator to define a linear relationship between zoom level and circle size using a set of input-output pairs. In this case, the expression indicates that the circle radius should be 1 pixel when the zoom level is 5 or below, and 5 pixels when the zoom is 10 or above. In between, the radius will be linearly interpolated between 1 and 5 pixels

Camera expressions are allowed anywhere an expression may be used. However, when a camera expression used as the value of a layout or paint property, it must be in one of the following forms:

[ "interpolate", interpolation, ["zoom"], ... ]

Or:

[ "step", ["zoom"], ... ]

Or:

[
    "let",
    ... variable bindings...,
    [ "interpolate", interpolation, ["zoom"], ... ]
]

Or:

[
    "let",
    ... variable bindings...,
    [ "step", ["zoom"], ... ]
]

That is, in layout or paint properties, ["zoom"] may appear only as the input to an outer interpolate or step expression, or such an expression within a let expression.

There is an important difference between layout and paint properties in the timing of camera expression evaluation. Paint property camera expressions are re-evaluated whenever the zoom level changes, even fractionally. For example, a paint property camera expression will be re-evaluated continuously as the map moves between zoom levels 4.1 and 4.6. On the other hand, a layout property camera expression is evaluated only at integer zoom levels. It will not be re-evaluated as the zoom changes from 4.1 to 4.6 – only if it goes above 5 or below 4.

Composition

A single expression may use a mix of data operators, camera operators, and other operators. Such composite expressions allows a layer’s appearance to be determined by a combination of the zoom level and individual feature properties.

{
    "circle-radius": [
        "interpolate", ["linear"], ["zoom"],
        // when zoom is 0, set each feature's circle radius to the value of its "rating" property
        0, ["get", "rating"],
        // when zoom is 10, set each feature's circle radius to four times the value of its "rating" property
        10, ["*", 4, ["get", "rating"]]
    ]
}

An expression that uses both data and camera operators is considered both a data expression and a camera expression, and must adhere to the restrictions described above for both.

Type system

The input arguments to expressions, and their result values, use the same set of types as the rest of the style specification: boolean, string, number, color, and arrays of these types. Furthermore, expressions are type safe: each use of an expression has a known result type and required argument types, and the SDKs verify that the result type of an expression is appropriate for the context in which it is used. For example, the result type of an expression in the filter property must be boolean, and the arguments to the + operator must be numbers.

When working with feature data, the type of a feature property value is typically not known ahead of time by the SDK. In order to preserve type safety, when evaluating a data expression, the SDK will check that the property value is appropriate for the context. For example, if you use the expression ["get", "feature-color"] for the circle-color property, the SDK will verify that the feature-color value of each feature is a string identifying a valid color. If this check fails, an error will be indicated in an SDK-specific way (typically a log message), and the default value for the property will be used instead.

In most cases, this verification will occur automatically wherever it is needed. However, in certain situations, the SDK may be unable to automatically determine the expected result type of a data expression from surrounding context. For example, it is not clear whether the expression ["<", ["get", "a"], ["get", "b"]] is attempting to compare strings or numbers. In situations like this, you can use one of the type assertion expression operators to indicate the expected type of a data expression: ["<", ["number", ["get", "a"]], ["number", ["get", "b"]]]. A type assertion checks that the feature data actually matches the expected type of the data expression. If this check fails, it produces an error and causes the whole expression to fall back to the default value for the property being defined. The assertion operators are array, boolean, number, and string.

Expressions perform only one kind of implicit type conversion: a data expression used in a context where a color is expected will convert a string representation of a color to a color value. In all other cases, if you want to convert between types, you must use one of the type conversion expression operators: to-boolean, to-number, to-string, or to-color. For example, if you have a feature property that stores numeric values in string format, and you want to use those values as numbers rather than strings, you can use an expression such as ["to-number", ["get", "property-name"]].

Expression reference

Types¶

The expressions in this section are provided for the purpose of testing for and converting between different data types like strings, numbers, and boolean values.

Often, such tests and conversions are unnecessary, but they may be necessary in some expressions where the type of a certain sub-expression is ambiguous. They can also be useful in cases where your feature data has inconsistent types; for example, you could use to-number to make sure that values like "1.5" (instead of 1.5) are treated as numeric values.

array¶

Asserts that the input is an array (optionally with a specific item type and length). If, when the input expression is evaluated, it is not of the asserted type, then this assertion will cause the whole expression to be aborted.

["array", value]: array

["array", type: "string" | "number" | "boolean", value]: array<type>

["array",
    type: "string" | "number" | "boolean",
    N: number (literal),
    value
]: array<type, N>

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

boolean¶

Asserts that the input value is a boolean. If multiple values are provided, each one is evaluated in order until a boolean is obtained. If none of the inputs are booleans, the expression is an error.

["boolean", value]: boolean

["boolean", value, fallback: value, fallback: value, ...]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

collator¶

Returns a collator for use in locale-dependent comparison operations. The case-sensitive and diacritic-sensitive options default to false. The locale argument specifies the IETF language tag of the locale to use. If none is provided, the default locale is used. If the requested locale is not available, the collator will use a system-defined fallback locale. Use resolved-locale to test the results of locale fallback behavior.

["collator",
    { "case-sensitive": boolean, "diacritic-sensitive": boolean, "locale": string }
]: collator

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.45.0	>= Not yet supported	>= Not yet supported

format¶

Returns formatted text containing annotations for use in mixed-format text-field entries. If set, the text-font argument overrides the font specified by the root layout properties. If set, the font-scale argument specifies a scaling factor relative to the text-size specified in the root layout properties.

["format",
    input_1: string, options_1: { "font-scale": number, "text-font": array<string> },
    ...,
    input_n: string, options_n: { "font-scale": number, "text-font": array<string> }
]: formatted

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.48.0	>= Not yet supported	>= Not yet supported

literal¶

Provides a literal array or object value.

["literal", [...] (JSON array literal)]: array<T, N>

["literal", {...} (JSON object literal)]: Object

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

number¶

Asserts that the input value is a number. If multiple values are provided, each one is evaluated in order until a number is obtained. If none of the inputs are numbers, the expression is an error.

["number", value]: number

["number", value, fallback: value, fallback: value, ...]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

object¶

Asserts that the input value is an object. If multiple values are provided, each one is evaluated in order until an object is obtained. If none of the inputs are objects, the expression is an error.

["object", value]: object

["object", value, fallback: value, fallback: value, ...]: object

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

string¶

Asserts that the input value is a string. If multiple values are provided, each one is evaluated in order until a string is obtained. If none of the inputs are strings, the expression is an error.

["string", value]: string

["string", value, fallback: value, fallback: value, ...]: string

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

to-boolean¶

Converts the input value to a boolean. The result is false when then input is an empty string, 0, false, null, or NaN; otherwise it is true.

["to-boolean", value]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

to-color¶

Converts the input value to a color. If multiple values are provided, each one is evaluated in order until the first successful conversion is obtained. If none of the inputs can be converted, the expression is an error.

["to-color", value, fallback: value, fallback: value, ...]: color

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

to-number¶

Converts the input value to a number, if possible. If the input is null or false, the result is 0. If the input is true, the result is 1. If the input is a string, it is converted to a number as specified by the “ToNumber Applied to the String Type” algorithm of the ECMAScript Language Specification. If multiple values are provided, each one is evaluated in order until the first successful conversion is obtained. If none of the inputs can be converted, the expression is an error.

["to-number", value, fallback: value, fallback: value, ...]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

to-string¶

Converts the input value to a string. If the input is null, the result is "". If the input is a boolean, the result is "true" or "false". If the input is a number, it is converted to a string as specified by the “NumberToString” algorithm of the ECMAScript Language Specification. If the input is a color, it is converted to a string of the form "rgba(r,g,b,a)", where r, g, and b are numerals ranging from 0 to 255, and a ranges from 0 to 1. Otherwise, the input is converted to a string in the format specified by the JSON.stringify function of the ECMAScript Language Specification.

["to-string", value]: string

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

typeof¶

Returns a string describing the type of the given value.

["typeof", value]: string

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

Feature data¶

feature-state¶

Retrieves a property value from the current feature’s state. Returns null if the requested property is not present on the feature’s state. A feature’s state is not part of the GeoJSON or vector tile data, and must be set programmatically on each feature. Note that ["feature-state"] can only be used with paint properties that support data-driven styling.

["feature-state", string]: value

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.46.0	>= Not yet supported	>= Not yet supported

geometry-type¶

Gets the feature’s geometry type: Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon.

["geometry-type"]: string

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

id¶

Gets the feature’s id, if it has one.

["id"]: value

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

line-progress¶

Gets the progress along a gradient line. Can only be used in the line-gradient property.

["line-progress"]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.45.0	>= Not yet supported	>= Not yet supported

properties¶

Gets the feature properties object. Note that in some cases, it may be more efficient to use [“get”, “property_name”] directly.

["properties"]: object

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= Not yet supported	>= 3.0.0

Lookup¶

at¶

Retrieves an item from an array.

["at", number, array]: ItemType

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

get¶

Retrieves a property value from the current feature’s properties, or from another object if a second argument is provided. Returns null if the requested property is missing.

["get", string]: value

["get", string, object]: value

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

has¶

Tests for the presence of an property value in the current feature’s properties, or from another object if a second argument is provided.

["has", string]: boolean

["has", string, object]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

length¶

Gets the length of an array or string.

["length", string | array | value]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

Decision¶

The expressions in this section can be used to add conditional logic to your styles. For example, the 'case' expression provides basic “if/then/else” logic, and 'match' allows you to map specific values of an input expression to different output expressions.

!¶

Logical negation. Returns true if the input is false, and false if the input is true.

["!", boolean]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

!=¶

Returns true if the input values are not equal, false otherwise. The comparison is strictly typed: values of different runtime types are always considered unequal. Cases where the types are known to be different at parse time are considered invalid and will produce a parse error. Accepts an optional collator argument to control locale-dependent string comparisons.

["!=", value, value]: boolean

["!=", value, value, collator]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0
collator	>= 0.45.0	>= Not yet supported	>= Not yet supported

<¶

Returns true if the first input is strictly less than the second, false otherwise. The arguments are required to be either both strings or both numbers; if during evaluation they are not, expression evaluation produces an error. Cases where this constraint is known not to hold at parse time are considered in valid and will produce a parse error. Accepts an optional collator argument to control locale-dependent string comparisons.

["<", value, value]: boolean

["<", value, value, collator]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0
collator	>= 0.45.0	>= Not yet supported	>= Not yet supported

<=¶

Returns true if the first input is less than or equal to the second, false otherwise. The arguments are required to be either both strings or both numbers; if during evaluation they are not, expression evaluation produces an error. Cases where this constraint is known not to hold at parse time are considered in valid and will produce a parse error. Accepts an optional collator argument to control locale-dependent string comparisons.

["<=", value, value]: boolean

["<=", value, value, collator]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0
collator	>= 0.45.0	>= Not yet supported	>= Not yet supported

==¶

Returns true if the input values are equal, false otherwise. The comparison is strictly typed: values of different runtime types are always considered unequal. Cases where the types are known to be different at parse time are considered invalid and will produce a parse error. Accepts an optional collator argument to control locale-dependent string comparisons.

["==", value, value]: boolean

["==", value, value, collator]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0
collator	>= 0.45.0	>= Not yet supported	>= Not yet supported

>¶

Returns true if the first input is strictly greater than the second, false otherwise. The arguments are required to be either both strings or both numbers; if during evaluation they are not, expression evaluation produces an error. Cases where this constraint is known not to hold at parse time are considered in valid and will produce a parse error. Accepts an optional collator argument to control locale-dependent string comparisons.

[">", value, value]: boolean

[">", value, value, collator]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0
collator	>= 0.45.0	>= Not yet supported	>= Not yet supported

>=¶

Returns true if the first input is greater than or equal to the second, false otherwise. The arguments are required to be either both strings or both numbers; if during evaluation they are not, expression evaluation produces an error. Cases where this constraint is known not to hold at parse time are considered in valid and will produce a parse error. Accepts an optional collator argument to control locale-dependent string comparisons.

[">=", value, value]: boolean

[">=", value, value, collator]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0
collator	>= 0.45.0	>= Not yet supported	>= Not yet supported

all¶

Returns true if all the inputs are true, false otherwise. The inputs are evaluated in order, and evaluation is short-circuiting: once an input expression evaluates to false, the result is false and no further input expressions are evaluated.

["all", boolean, boolean]: boolean

["all", boolean, boolean, ...]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

any¶

Returns true if any of the inputs are true, false otherwise. The inputs are evaluated in order, and evaluation is short-circuiting: once an input expression evaluates to true, the result is true and no further input expressions are evaluated.

["any", boolean, boolean]: boolean

["any", boolean, boolean, ...]: boolean

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

case¶

Selects the first output whose corresponding test condition evaluates to true.

["case",
    condition: boolean, output: OutputType, condition: boolean, output: OutputType, ...,
    default: OutputType
]: OutputType

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

coalesce¶

Evaluates each expression in turn until the first non-null value is obtained, and returns that value.

["coalesce", OutputType, OutputType, ...]: OutputType

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

match¶

Selects the output whose label value matches the input value, or the fallback value if no match is found. The input can be any expression (e.g. ["get", "building_type"]). Each label must either be a single literal value or an array of literal values (e.g. "a" or ["c", "b"]), and those values must be all strings or all numbers. (The values "1" and 1 cannot both be labels in the same match expression.) Each label must be unique. If the input type does not match the type of the labels, the result will be the fallback value.

["match",
    input: InputType (number or string),
    label_1: InputType | [InputType, InputType, ...], output_1: OutputType,
    label_n: InputType | [InputType, InputType, ...], output_n: OutputType, ...,
    default: OutputType
]: OutputType

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

Ramps, scales, curves¶

interpolate¶

Produces continuous, smooth results by interpolating between pairs of input and output values (“stops”). The input may be any numeric expression (e.g., ["get", "population"]). Stop inputs must be numeric literals in strictly ascending order. The output type must be number, array<number>, or color.

Interpolation types:

["linear"]: interpolates linearly between the pair of stops just less than and just greater than the input.
["exponential", base]: interpolates exponentially between the stops just less than and just greater than the input. base controls the rate at which the output increases: higher values make the output increase more towards the high end of the range. With values close to 1 the output increases linearly.
["cubic-bezier", x1, y1, x2, y2]: interpolates using the cubic bezier curve defined by the given control points.

["interpolate",
    interpolation: ["linear"] | ["exponential", base] | ["cubic-bezier", x1, y1, x2, y2 ],
    input: number,
    stop_input_1: number, stop_output_1: OutputType,
    stop_input_n: number, stop_output_n: OutputType, ...
]: OutputType (number, array<number>, or Color)

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.42.0	>= Not yet supported	>= 3.0.0

interpolate-hcl¶

Produces continuous, smooth results by interpolating between pairs of input and output values (“stops”). Works like interpolate, but the output type must be color, and the interpolation is performed in the Hue-Chroma-Luminance color space.

["interpolate-hcl",
    interpolation: ["linear"] | ["exponential", base] | ["cubic-bezier", x1, y1, x2, y2 ],
    input: number,
    stop_input_1: number, stop_output_1: Color,
    stop_input_n: number, stop_output_n: Color, ...
]: Color

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.49.0	>= Not yet supported	>= 3.0.0

interpolate-lab¶

Produces continuous, smooth results by interpolating between pairs of input and output values (“stops”). Works like interpolate, but the output type must be color, and the interpolation is performed in the CIELAB color space.

["interpolate-lab",
    interpolation: ["linear"] | ["exponential", base] | ["cubic-bezier", x1, y1, x2, y2 ],
    input: number,
    stop_input_1: number, stop_output_1: Color,
    stop_input_n: number, stop_output_n: Color, ...
]: Color

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.49.0	>= Not yet supported	>= 3.0.0

step¶

Produces discrete, stepped results by evaluating a piecewise-constant function defined by pairs of input and output values (“stops”). The input may be any numeric expression (e.g., ["get", "population"]). Stop inputs must be numeric literals in strictly ascending order. Returns the output value of the stop just less than the input, or the first input if the input is less than the first stop.

["step",
    input: number,
    stop_output_0: OutputType,
    stop_input_1: number, stop_output_1: OutputType,
    stop_input_n: number, stop_output_n: OutputType, ...
]: OutputType

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.42.0	>= Not yet supported	>= 3.0.0

Variable binding¶

let¶

Binds expressions to named variables, which can then be referenced in the result expression using [“var”, “variable_name”].

["let",
    string (alphanumeric literal), any, string (alphanumeric literal), any, ...,
    OutputType
]: OutputType

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= Not yet supported	>= 3.0.0

var¶

References variable bound using “let”.

["var", previously bound variable name]: the type of the bound expression

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= Not yet supported	>= 3.0.0

String¶

concat¶

Returns a string consisting of the concatenation of the inputs. Each input is converted to a string as if by to-string.

["concat", value, value, ...]: string

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

downcase¶

Returns the input string converted to lowercase. Follows the Unicode Default Case Conversion algorithm and the locale-insensitive case mappings in the Unicode Character Database.

["downcase", string]: string

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= Not yet supported

is-supported-script¶

Returns true if the input string is expected to render legibly. Returns false if the input string contains sections that cannot be rendered without potential loss of meaning (e.g. Indic scripts that require complex text shaping, or right-to-left scripts if the the mapbox-gl-rtl-text plugin is not in use in Mapbox GL JS).

["is-supported-script", string]: boolean

resolved-locale¶

Returns the IETF language tag of the locale being used by the provided collator. This can be used to determine the default system locale, or to determine if a requested locale was successfully loaded.

["resolved-locale", collator]: string

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.45.0	>= Not yet supported	>= Not yet supported

upcase¶

Returns the input string converted to uppercase. Follows the Unicode Default Case Conversion algorithm and the locale-insensitive case mappings in the Unicode Character Database.

["upcase", string]: string

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= Not yet supported

Color¶

rgb¶

Creates a color value from red, green, and blue components, which must range between 0 and 255, and an alpha component of 1. If any component is out of range, the expression is an error.

["rgb", number, number, number]: color

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

rgba¶

Creates a color value from red, green, blue components, which must range between 0 and 255, and an alpha component which must range between 0 and 1. If any component is out of range, the expression is an error.

["rgba", number, number, number, number]: color

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= Not yet supported	>= 3.0.0

to-rgba¶

Returns a four-element array containing the input color’s red, green, blue, and alpha components, in that order.

["to-rgba", color]: array<number, 4>

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= Not yet supported	>= 3.0.0

Math¶

-¶

For two inputs, returns the result of subtracting the second input from the first. For a single input, returns the result of subtracting it from 0.

["-", number, number]: number

["-", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

*¶

Returns the product of the inputs.

["*", number, number, ...]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

/¶

Returns the result of floating point division of the first input by the second.

["/", number, number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

%¶

Returns the remainder after integer division of the first input by the second.

["%", number, number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

^¶

Returns the result of raising the first input to the power specified by the second.

["^", number, number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

+¶

Returns the sum of the inputs.

["+", number, number, ...]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

abs¶

Returns the absolute value of the input.

["abs", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.45.0	>= Not yet supported	>= 3.0.0

acos¶

Returns the arccosine of the input.

["acos", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

asin¶

Returns the arcsine of the input.

["asin", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

atan¶

Returns the arctangent of the input.

["atan", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

ceil¶

Returns the smallest integer that is greater than or equal to the input.

["ceil", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.45.0	>= Not yet supported	>= 3.0.0

cos¶

Returns the cosine of the input.

["cos", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

e¶

Returns the mathematical constant e.

["e"]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

floor¶

Returns the largest integer that is less than or equal to the input.

["floor", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.45.0	>= Not yet supported	>= 3.0.0

ln¶

Returns the natural logarithm of the input.

["ln", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

ln2¶

Returns mathematical constant ln(2).

["ln2"]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

log10¶

Returns the base-ten logarithm of the input.

["log10", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

log2¶

Returns the base-two logarithm of the input.

["log2", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

max¶

Returns the maximum value of the inputs.

["max", number, number, ...]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

min¶

Returns the minimum value of the inputs.

["min", number, number, ...]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

pi¶

Returns the mathematical constant pi.

["pi"]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

round¶

Rounds the input to the nearest integer. Halfway values are rounded away from zero. For example, ["round", -1.5] evaluates to -2.

["round", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.45.0	>= Not yet supported	>= 3.0.0

sin¶

Returns the sine of the input.

["sin", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

sqrt¶

Returns the square root of the input.

["sqrt", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.42.0	>= 20.0	>= 3.0.0

tan¶

Returns the tangent of the input.

["tan", number]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

Zoom¶

zoom¶

Gets the current zoom level. Note that in style layout and paint properties, [“zoom”] may only appear as the input to a top-level “step” or “interpolate” expression.

["zoom"]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= 20.0	>= 3.0.0

Heatmap¶

heatmap-density¶

Gets the kernel density estimation of a pixel in a heatmap layer, which is a relative measure of how many data points are crowded around a particular pixel. Can only be used in the heatmap-color property.

["heatmap-density"]: number

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.41.0	>= Not yet supported	>= Not yet supported

Other¶

Function¶

The value for any layout or paint property may be specified as a function. Functions allow you to make the appearance of a map feature change with the current zoom level and/or the feature’s properties.

stops¶

Required (except for identity functions) :ref:`types-array`.

Functions are defined in terms of input and output values. A set of one input value and one output value is known as a “stop.”

property¶

Optional String.

If specified, the function will take the specified feature property as an input. See Zoom Functions and Property Functions for more information.

base¶

Optional Number. Default is 1.

The exponential base of the interpolation curve. It controls the rate at which the function output increases. Higher values make the output increase more towards the high end of the range. With values close to 1 the output increases linearly.

type¶

Optional Enum. One of identity, exponential, interval, categorical.

identity: functions return their input as their output.
exponential: functions generate an output by interpolating between stops just less than and just greater than the function input. The domain must be numeric. This is the default for properties marked with , the “exponential” symbol.
interval: functions return the output value of the stop just less than the function input. The domain must be numeric. This is the default for properties marked with , the “interval” symbol.
categorical: functions return the output value of the stop equal to the function input.

default¶

A value to serve as a fallback function result when a value isn’t otherwise available. It is used in the following circumstances:

In categorical functions, when the feature value does not match any of the stop domain values.
In property and zoom-and-property functions, when a feature does not contain a value for the specified property.
In identity functions, when the feature value is not valid for the style property (for example, if the function is being used for a circle-color property but the feature property value is not a string or not a valid color).
In interval or exponential property and zoom-and-property functions, when the feature value is not numeric.

If no default is provided, the style property’s default is used in these circumstances.

colorSpace¶

Optional Enum. One of rgb, lab, hcl.

The color space in which colors interpolated. Interpolating colors in perceptual color spaces like LAB and HCL tend to produce color ramps that look more consistent and produce colors that can be differentiated more easily than those interpolated in RGB space.

rgb: Use the RGB color space to interpolate color values
lab: Use the LAB color space to interpolate color values.
hcl: Use the HCL color space to interpolate color values, interpolating the Hue, Chroma, and Luminance channels individually.

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
`property`	>= 0.18.0	>= 17.1	>= 2.4.0
`type`	>= 0.18.0	>= 17.1	>= 2.4.0
`exponential` type	>= 0.18.0	>= 17.1	>= 2.4.0
`interval` type	>= 0.18.0	>= 17.1	>= 2.4.0
`categorical` type	>= 0.18.0	>= 17.1	>= 2.4.0
`identity` type	>= 0.18.0	>= 17.1	>= 2.4.0
`default` type	>= 0.18.0	>= 17.1	>= 2.4.0
`colorSpace` type	>= 0.26.0	Not yet supported	>= 2.4.0

Zoom functions allow the appearance of a map feature to change with map’s zoom level. Zoom functions can be used to create the illusion of depth and control data density. Each stop is an array with two elements: the first is a zoom level and the second is a function output value.

{
  "circle-radius": {
    "stops": [

      // zoom is 5 -> circle radius will be 1px
      [5, 1],

      // zoom is 10 -> circle radius will be 2px
      [10, 2]

    ]
  }
}

The rendered values of Color, Number, and Array properties are intepolated between stops. Enum, Boolean, and String property values cannot be intepolated, so their rendered values only change at the specified stops.

There is an important difference between the way that zoom functions render for layout and paint properties. Paint properties are continuously re-evaluated whenever the zoom level changes, even fractionally. The rendered value of a paint property will change, for example, as the map moves between zoom levels 4.1 and 4.6. Layout properties, on the other hand, are evaluated only once for each integer zoom level. To continue the prior example: the rendering of a layout property will not change between zoom levels 4.1 and 4.6, no matter what stops are specified; but at zoom level 5, the function will be re-evaluated according to the function, and the property’s rendered value will change. (You can include fractional zoom levels in a layout property zoom function, and it will affect the generated values; but, still, the rendering will only change at integer zoom levels.)

Property functions allow the appearance of a map feature to change with its properties. Property functions can be used to visually differentate types of features within the same layer or create data visualizations. Each stop is an array with two elements, the first is a property input value and the second is a function output value. Note that support for property functions is not available across all properties and platforms at this time.

{
  "circle-color": {
    "property": "temperature",
    "stops": [

      // "temperature" is 0   -> circle color will be blue
      [0, 'blue'],

      // "temperature" is 100 -> circle color will be red
      [100, 'red']

    ]
  }
}

Zoom-and-property functions allow the appearance of a map feature to change with both its properties and zoom. Each stop is an array with two elements, the first is an object with a property input value and a zoom, and the second is a function output value. Note that support for property functions is not yet complete.

{
  "circle-radius": {
    "property": "rating",
    "stops": [

      // zoom is 0 and "rating" is 0 -> circle radius will be 0px
      [{zoom: 0, value: 0}, 0],

      // zoom is 0 and "rating" is 5 -> circle radius will be 5px
      [{zoom: 0, value: 5}, 5],

      // zoom is 20 and "rating" is 0 -> circle radius will be 0px
      [{zoom: 20, value: 0}, 0],

      // zoom is 20 and "rating" is 5 -> circle radius will be 20px
      [{zoom: 20, value: 5}, 20]

    ]
  }
}

Filter¶

A filter selects specific features from a layer. A filter is an array of one of the following forms:

Existential Filters¶

["has", key] feature[key] exists

["!has", key] feature[key] does not exist

Comparison Filters¶

["==", key, value] equality: feature[key] = value

["!=", key, value] inequality: feature[key] ≠ value

[">", key, value] greater than: feature[key] > value

[">=", key, value] greater than or equal: feature[key] ≥ value

["<", key, value] less than: feature[key] < value

["<=", key, value] less than or equal: feature[key] ≤ value

Set Membership Filters¶

["in", key, v0, ..., vn] set inclusion: feature[key] ∈ {v0, …, vn}

["!in", key, v0, ..., vn] set exclusion: feature[key] ∉ {v0, …, vn}

Combining Filters¶

["all", f0, ..., fn] logical AND: f0 ∧ … ∧ fn

["any", f0, ..., fn] logical OR: f0 ∨ … ∨ fn

["none", f0, ..., fn] logical NOR: ¬f0 ∧ … ∧ ¬fn

A key must be a string that identifies a feature property, or one of the following special keys:

"$type": the feature type. This key may be used with the "==", "!=", "in", and "!in" operators. Possible values are "Point", "LineString", and "Polygon".
"$id": the feature identifier. This key may be used with the "==", "!=", "has", "!has", "in", and "!in" operators.

A value (and v0, …, vn for set operators) must be a String, Number, or Boolean to compare the property value against.

Set membership filters are a compact and efficient way to test whether a field matches any of multiple values.

The comparison and set membership filters implement strictly-typed comparisons; for example, all of the following evaluate to false: 0 < "1", 2 == "2", "true" in [true, false].

The "all", "any", and "none" filter operators are used to create compound filters. The values f0, …, fn must be filter expressions themselves.

["==", "$type", "LineString"]

This filter requires that the class property of each feature is equal to either “street_major”, “street_minor”, or “street_limited”.

["in", "class", "street_major", "street_minor", "street_limited"]

The combining filter “all” takes the three other filters that follow it and requires all of them to be true for a feature to be included: a feature must have a class equal to “street_limited”, its admin_level must be greater than or equal to 3, and its type cannot be Polygon. You could change the combining filter to “any” to allow features matching any of those criteria to be included - features that are Polygons, but have a different class value, and so on.

[
  "all",
  ["==", "class", "street_limited"],
  [">=", "admin_level", 3],
  ["!in", "$type", "Polygon"]
]

Support	Mapbox	GeoTools	OpenLayers
basic functionality	>= 0.10.0	>= 17.1	>= 2.4.0
`has`/`!has`	>= 0.19.0	>= 17.1	>= 2.4.0