---
title: "MTRasterDEMEncoding | Mobile sdk | Mobile sdk ios | Ios"
description: "Encoding used by the Raster DEM source."
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# MTRasterDEMEncoding

```
public enum MTRasterDEMEncoding : String, Sendable
```

Encoding used by the Raster DEM source.

-   `[terrarium](#/s:11MapTilerSDK19MTRasterDEMEncodingO9terrariumyA2CmF)`
    
    Terrarium format PNG tiles.
    
    #### Declaration
    
    Swift
    
    ```
    case terrarium
    ```
    
-   `[mapbox](#/s:11MapTilerSDK19MTRasterDEMEncodingO6mapboxyA2CmF)`
    
    Terrain RGB tiles (Mapbox/MapTiler Terrain RGB).
    
    #### Declaration
    
    Swift
    
    ```
    case mapbox
    ```