---
title: boundingRegion
framework: vision
role: symbol
role_heading: Instance Property
path: vision/documentobservation/container/list/boundingregion
---

# boundingRegion

A polygon that defines the boundary of the list.

## Declaration

```swift
var boundingRegion: NormalizedRegion { get }
```

## Parameters

- `boundingBox`: The bounding box of the object.

## See Also

### Inspecting a list

- [items](vision/documentobservation/container/list/items.md)
- [DocumentObservation.Container.List.Marker](vision/documentobservation/container/list/marker.md)