---
title: ARGeoAnchor.AltitudeSource.unknown
framework: arkit
role: symbol
role_heading: Case
path: arkit/argeoanchor/altitudesource-swift.enum/unknown
---

# ARGeoAnchor.AltitudeSource.unknown

Altitude isn’t yet set.

## Declaration

```swift
case unknown
```

## See Also

### Sources

- [ARGeoAnchor.AltitudeSource.precise](arkit/argeoanchor/altitudesource-swift.enum/precise.md)
- [ARGeoAnchor.AltitudeSource.coarse](arkit/argeoanchor/altitudesource-swift.enum/coarse.md)
- [ARGeoAnchor.AltitudeSource.userDefined](arkit/argeoanchor/altitudesource-swift.enum/userdefined.md)