---
title: "RequestDescriptor.detectHorizonRequest(_:)"
framework: vision
role: symbol
role_heading: Case
path: "vision/requestdescriptor/detecthorizonrequest(_:)"
---

# RequestDescriptor.detectHorizonRequest(_:)

A descriptor that describes a detect horizon request.

## Declaration

```swift
case detectHorizonRequest(DetectHorizonRequest.Revision)
```

## See Also

### Getting the trajectory, contour, and horizon detection descriptor

- [RequestDescriptor.detectTrajectoriesRequest(_:)](vision/requestdescriptor/detecttrajectoriesrequest(_:).md)
- [RequestDescriptor.detectContoursRequest(_:)](vision/requestdescriptor/detectcontoursrequest(_:).md)