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The TerrainLayer reconstructs mesh surfaces from height map images, e.g. Mapzen Terrain Tiles, which encodes elevation into R,G,B values.

When elevationData is supplied with a URL template, i.e. a string containing '{x}' and '{y}', it loads terrain tiles on demand using a TileLayer and renders a mesh for each tile. If elevationData is an absolute URL, a single mesh is used, and the bounds prop is required to position it into the world space.

import {Deck} from '';
import {TerrainLayer} from '';

const layer = new TerrainLayer({
elevationDecoder: {
rScaler: 2,
gScaler: 0,
bScaler: 0,
offset: 0
// Digital elevation model from
elevationData: '',
texture: '',
bounds: [-122.5233, 37.6493, -122.3566, 37.8159],

new Deck({
initialViewState: {
longitude: -122.4,
latitude: 37.74,
zoom: 11
controller: true,
layers: [layer]


To install the dependencies from NPM:

npm install
# or
npm install
import {TerrainLayer} from '';
import type {TerrainLayerProps} from '';

new TerrainLayer(...props: TerrainLayerProps[]);

To use pre-bundled scripts:

<script src="^9.0.0/dist.min.js"></script>
<!-- or -->
<script src="^9.0.0/dist.min.js"></script>
<script src="^9.0.0/dist.min.js"></script>
<script src="^9.0.0/dist.min.js"></script>
new deck.TerrainLayer({});


When in Tiled Mode, inherits from all TileLayer properties. Forwards wireframe property to SimpleMeshLayer.

Data Options

elevationData (string | string[], required)

Image URL that encodes height data.

  • If the value is a valid URL, this layer will render a single mesh.
  • If the value is a string, and contains substrings {x} and {y}, it is considered a URL template. This layer will render a TileLayer of meshes. {x} {y} and {z} will be replaced with a tile's actual index when it is requested.
  • If the value is an array: multiple URL templates. See TileLayer's data prop documentation for use cases.

texture (string | null, optional)

Image URL to use as the surface texture. Same schema as elevationData.

  • Default: null

meshMaxError (number, optional)

Martini error tolerance in meters, smaller number results in more detailed mesh..

  • Default: 4.0

elevationDecoder (object, optional)

Parameters used to convert a pixel to elevation in meters. An object containing the following fields:

  • rScaler: Multiplier of the red channel.
  • gScaler: Multiplier of the green channel.
  • bScaler: Multiplier of the blue channel.
  • offset: Translation of the sum.

Each color channel (r, g, and b) is a number between [0, 255].

For example, the Mapbox terrain service's elevation is encoded as follows:

height = -10000 + ((R * 256 * 256 + G * 256 + B) * 0.1)

The corresponding elevationDecoder is:

"rScaler": 6553.6,
"gScaler": 25.6,
"bScaler": 0.1,
"offset": -10000

The default value of elevationDecoder decodes a grayscale image:

"rScaler": 1,
"gScaler": 0,
"bScaler": 0,
"offset": 0

bounds (number[4], optional)

Bounds of the image to fit x,y coordinates into. In [left, bottom, right, top]. left and right refers to the world longitude/x at the corresponding side of the image. top and bottom refers to the world latitude/y at the corresponding side of the image.

Must be supplied when using non-tiled elevation data.

  • Default: null

loadOptions (object, optional)

On top of the default options, also accepts options for the following loaders:

Note that by default, the TerrainLoader parses data using web workers, with code loaded from a CDN. To change this behavior, see loaders and workers.

Render Options

color (Color, optional)

Color to use if texture is unavailable. Forwarded to SimpleMeshLayer's getColor prop.

  • Default: [255, 255, 255]

wireframe (boolean, optional)

Forwarded to SimpleMeshLayer's wireframe prop.

  • Default: false

material (Material, optional)

Forwarded to SimpleMeshLayer's material prop.

  • Default: true

Sub Layers

The TerrainLayer renders the following sublayers:

  • tiles - a TileLayer. Only rendered if elevationData is a URL template.
  • mesh - a SimpleMeshLayer rendering the terrain mesh.