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# ARTrackingStateReason

Possible causes for limited position-tracking quality.

```
enum ARTrackingStateReason : NSInteger;
```

## Topics

### Reason Values

[`ARTrackingStateReasonNone`](/documentation/ARKit/ARTrackingStateReason/ARTrackingStateReasonNone)

The current tracking state is not limited.

[`ARTrackingStateReasonInitializing`](/documentation/ARKit/ARTrackingStateReason/ARTrackingStateReasonInitializing)

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

[`ARTrackingStateReasonRelocalizing`](/documentation/ARKit/ARTrackingStateReason/ARTrackingStateReasonRelocalizing)

The AR session is attempting to resume after an interruption.

[`ARTrackingStateReasonExcessiveMotion`](/documentation/ARKit/ARTrackingStateReason/ARTrackingStateReasonExcessiveMotion)

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

[`ARTrackingStateReasonInsufficientFeatures`](/documentation/ARKit/ARTrackingStateReason/ARTrackingStateReasonInsufficientFeatures)

The scene visible to the camera does not contain enough distinguishable features for image-based position tracking.


---

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