---
title: HorizonObservation
framework: vision
role: symbol
role_heading: Structure
path: vision/horizonobservation
---

# HorizonObservation

The horizon angle information that an image-analysis request detects.

## Declaration

```swift
struct HorizonObservation
```

## Overview

Overview Instances of this class result from invoking a DetectHorizonRequest, and report the angle and transform of the horizon in an image.

## Topics

### Creating an observation

- [init(_:)](vision/horizonobservation/init(_:).md)

### Inspecting an observation

- [angle](vision/horizonobservation/angle.md)

### Getting the transform

- [transform](vision/horizonobservation/transform.md)
- [transform(for:)](vision/horizonobservation/transform(for:).md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [VisionObservation](vision/visionobservation.md)