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# VNHorizonObservation

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

```
class VNHorizonObservation
```

## Overview

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

## Topics

### Evaluating the Horizon

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

The angle of the observed horizon.

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

The transform to apply to the detected horizon.

[`transform(forImageWidth:height:)`](/documentation/Vision/VNHorizonObservation/transform(forImageWidth:height:))

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


---

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