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# HorizonObservation

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

```
struct HorizonObservation
```

## Overview

Instances of this class result from invoking a [`DetectHorizonRequest`](/documentation/Vision/DetectHorizonRequest), and report the angle and transform of the horizon in an image.

## Topics

### Creating an observation

[`init(_:)`](/documentation/Vision/HorizonObservation/init(_:))

Creates a horizon observation.

### Inspecting an observation

[`angle`](/documentation/Vision/HorizonObservation/angle)

The angle of the observed horizon.

### Getting the transform

[`transform`](/documentation/Vision/HorizonObservation/transform)

The transform to apply to the detected horizon.

[`transform(for:)`](/documentation/Vision/HorizonObservation/transform(for:))

Creates an affine transform for the specified image width and height.


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