---
title: altitude
framework: arkit
role: symbol
role_heading: Instance Property
path: arkit/argeoanchor/altitude-9kges
---

# altitude

Vertical distance, in meters, between this anchor and sea level.

## Declaration

```occ
@property (nonatomic, readonly) CLLocationDistance altitude;
```

## Discussion

Discussion Negative values indicate below sea level. This property is valid only when altitudeSource is a value other than ARGeoAnchor.AltitudeSource.unknown.

## See Also

### Defining Altitude

- [altitudeSource](arkit/argeoanchor/altitudesource-swift.property.md)
- [ARGeoAnchor.AltitudeSource](arkit/argeoanchor/altitudesource-swift.enum.md)