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  "identifier" : "/documentation/ARKit/ARCamera/TrackingState-swift.enum/Reason",
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  "title" : "ARCamera.TrackingState.Reason"
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# ARCamera.TrackingState.Reason

Causes of limited position-tracking quality.

```
enum Reason
```

## Topics

### Inhibitors of Tracking Quality

[`ARCamera.TrackingState.Reason.initializing`](/documentation/ARKit/ARCamera/TrackingState-swift.enum/Reason/initializing)

The AR session has not gathered enough camera or motion data to provide tracking information.

[`ARCamera.TrackingState.Reason.relocalizing`](/documentation/ARKit/ARCamera/TrackingState-swift.enum/Reason/relocalizing)

The AR session is attempting to resume after an interruption.

[`ARCamera.TrackingState.Reason.excessiveMotion`](/documentation/ARKit/ARCamera/TrackingState-swift.enum/Reason/excessiveMotion)

The device is moving too fast for accurate image-based position tracking.

[`ARCamera.TrackingState.Reason.insufficientFeatures`](/documentation/ARKit/ARCamera/TrackingState-swift.enum/Reason/insufficientFeatures)

The scene visible to the camera doesn’t contain enough distinguishable features for image-based position tracking.


---

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