---
title: "MTFeatureKey | Mobile sdk | Mobile sdk ios | Ios"
description: "Commonly-used feature keys"
---

> 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.

# MTFeatureKey

```
public enum MTFeatureKey : String, Sendable
```

Commonly-used feature keys

-   `[pointCount](#/s:11MapTilerSDK12MTFeatureKeyO10pointCountyA2CmF)`
    
    Undocumented
    
    #### Declaration
    
    Swift
    
    ```
    case pointCount = "point_count"
    ```
    
-   `[clusterId](#/s:11MapTilerSDK12MTFeatureKeyO9clusterIdyA2CmF)`
    
    Undocumented
    
    #### Declaration
    
    Swift
    
    ```
    case clusterId = "cluster_id"
    ```