---
title: topLevelContours
framework: vision
role: symbol
role_heading: Instance Property
path: vision/vncontoursobservation/toplevelcontours
---

# topLevelContours

An array of contours that don’t have another contour enclosing them.

## Declaration

```swift
var topLevelContours: [VNContour] { get }
```

## Discussion

Discussion This array constitutes the top of the contour hierarchy. You can iterate over each VNContour instance to determine its children.

## See Also

### Inspecting the Observation

- [contourCount](vision/vncontoursobservation/contourcount.md)
- [normalizedPath](vision/vncontoursobservation/normalizedpath.md)
- [topLevelContourCount](vision/vncontoursobservation/toplevelcontourcount.md)
- [contour(at:)](vision/vncontoursobservation/contour(at:)-9on0y.md)
- [contour(at:)](vision/vncontoursobservation/contour(at:)-52odo.md)
- [VNContour](vision/vncontour.md)