---
title: maximumAspectRatio
framework: vision
role: symbol
role_heading: Instance Property
path: vision/detectrectanglesrequest/maximumaspectratio
---

# maximumAspectRatio

The largest aspect ratio the rectangle request detects.

## Declaration

```swift
var maximumAspectRatio: Float
```

## Discussion

Discussion The property’s value defaults to 1.0, but you can set it to any value in the range [0.0, 1.0]. You can use this value to choose specific rectangles in the detection like filtering out narrow rectangles by excluding small aspect ratios, or setting a range of 0.95 to 1.0 to select mostly squares.

## See Also

### Configuring a request

- [maximumObservations](vision/detectrectanglesrequest/maximumobservations.md)
- [minimumAspectRatio](vision/detectrectanglesrequest/minimumaspectratio.md)
- [minimumConfidence](vision/detectrectanglesrequest/minimumconfidence.md)
- [minimumSize](vision/detectrectanglesrequest/minimumsize.md)
- [quadratureToleranceDegrees](vision/detectrectanglesrequest/quadraturetolerancedegrees.md)