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    "iPadOS: 14.0.0 -"
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  "documentType" : "symbol",
  "framework" : "ARKit",
  "identifier" : "/documentation/ARKit/ARGeoAnchor/AltitudeSource-swift.enum",
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  "role" : "Enumeration",
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  "title" : "ARGeoAnchor.AltitudeSource"
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# ARGeoAnchor.AltitudeSource

Options for setting a location anchor’s altitude.

```
enum AltitudeSource
```

## Discussion

Each altitude source has unique performance and accuracy characteristics.

## Topics

### Sources

[`case precise`](/documentation/ARKit/ARGeoAnchor/AltitudeSource-swift.enum/precise)

The framework sets the altitude using a high-resolution digital-elevation model.

[`case coarse`](/documentation/ARKit/ARGeoAnchor/AltitudeSource-swift.enum/coarse)

The framework sets the altitude using a coarse digital-elevation model.

[`case userDefined`](/documentation/ARKit/ARGeoAnchor/AltitudeSource-swift.enum/userDefined)

The app defines the altitude.

[`case unknown`](/documentation/ARKit/ARGeoAnchor/AltitudeSource-swift.enum/unknown)

Altitude isn’t yet set.

### Initializers

[`init?(rawValue: Int)`](/documentation/ARKit/ARGeoAnchor/AltitudeSource-swift.enum/init(rawValue:))

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Hashable`](/documentation/Swift/Hashable)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

[`Equatable`](/documentation/Swift/Equatable)

[`BitwiseCopyable`](/documentation/Swift/BitwiseCopyable)

---

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