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# headingAccuracy

The maximum deviation (measured in degrees) between the reported heading and the true geomagnetic heading.

```
var headingAccuracy: CLLocationDirection { get }
```

## Discussion

A positive value in this property represents the potential error between the value reported by the [`magneticHeading`](/documentation/CoreLocation/CLHeading/magneticHeading) property and the actual direction of magnetic north. Thus, the lower the value of this property, the more accurate the heading. A negative value means that the reported heading is invalid, which can occur when the device is uncalibrated or there is strong interference from local magnetic fields.

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