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# depthDataAccuracy

The general accuracy of depth data map values.

```
var depthDataAccuracy: AVDepthData.Accuracy { get }
```

## Discussion

The accuracy of a depth data map is highly dependent on the camera calibration data used to generate it. If the camera’s focal length cannot be precisely determined at the time of capture, a scaling error in the z (depth) plane is introduced. If the camera’s optical center can’t be precisely determined at capture time, a principal point error is introduced, leading to an offset error in the disparity estimate. [`AVDepthData.Accuracy`](/documentation/AVFoundation/AVDepthData/Accuracy) constants report the accuracy of a map’s values with respect to its reported units.

---

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