---
title: NSWorldSensingUsageDescription
framework: bundleresources
role: symbol
role_heading: Property List Key
path: bundleresources/information-property-list/nsworldsensingusagedescription
---

# NSWorldSensingUsageDescription

A message that tells people why the app is requesting access to image tracking, plane detection, or scene reconstruction.

## Discussion

Discussion Use this key to indicate that your app requires access to world-sensing data. This includes plane detection, image tracking, and scene-reconstruction anchors. The first time your app tries to access world-sensing data, the system prompts for permission. Provide a string for the prompt that explains why your app needs access. For more information on setting up ARKit for world sensing, see Setting up access to ARKit data. note: World tracking — unlike world sensing — doesn’t require authorization. For more information, see Tracking specific points in world space.

## See Also

### Vision

- [NSHandsTrackingUsageDescription](bundleresources/information-property-list/nshandstrackingusagedescription.md)
- [NSAccessoryTrackingUsageDescription](bundleresources/information-property-list/nsaccessorytrackingusagedescription.md)