---
title: boundingMapRect
framework: mapkit
role: symbol
role_heading: Instance Property
path: mapkit/mkoverlay/boundingmaprect
---

# boundingMapRect

The projected rectangle that encompasses the overlay.

## Declaration

```swift
var boundingMapRect: MKMapRect { get }
```

## Discussion

Discussion This property contains the smallest rectangle that completely encompasses the overlay. Implementers of this protocol need to set this area when implementing their overlay class, and after setting it, not change it. Specify the rectangle using projected coordinates — that is, coordinates you obtain by projecting the globe onto a two-dimensional surface.

## See Also

### Describing the overlay geometry

- [coordinate](mapkit/mkoverlay/coordinate.md)