---
title: NINearbyObject.VerticalDirectionEstimate.unknown
framework: nearbyinteraction
role: symbol
role_heading: Case
path: nearbyinteraction/ninearbyobject/verticaldirectionestimate-swift.enum/unknown
---

# NINearbyObject.VerticalDirectionEstimate.unknown

An indication that the nearby object resides at an unknown vertical location.

## Declaration

```swift
case unknown
```

## See Also

### Relative vertical location

- [NINearbyObject.VerticalDirectionEstimate.same](nearbyinteraction/ninearbyobject/verticaldirectionestimate-swift.enum/same.md)
- [NINearbyObject.VerticalDirectionEstimate.above](nearbyinteraction/ninearbyobject/verticaldirectionestimate-swift.enum/above.md)
- [NINearbyObject.VerticalDirectionEstimate.below](nearbyinteraction/ninearbyobject/verticaldirectionestimate-swift.enum/below.md)
- [NINearbyObject.VerticalDirectionEstimate.aboveOrBelow](nearbyinteraction/ninearbyobject/verticaldirectionestimate-swift.enum/aboveorbelow.md)