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# CLCircularRegion

A circular geographic region that a center point and radius deine.

```
class CLCircularRegion
```

## Overview

The [`CLCircularRegion`](/documentation/CoreLocation/CLCircularRegion) class defines the location and boundaries for a circular geographic region. You can use instances of this class to define geofences for a specific location. The crossing of a geofence’s boundary causes the location manager to notify its delegate.

## Topics

### Creating a circular region

[`init(center:radius:identifier:)`](/documentation/CoreLocation/CLCircularRegion/init(center:radius:identifier:))

Creates and returns a region object defining a circular geographic area.

### Getting the circle’s center and radius

[`center`](/documentation/CoreLocation/CLCircularRegion/center)

The center point of the geographic area.

[`radius`](/documentation/CoreLocation/CLCircularRegion/radius)

The radius (measured in meters) that defines the geographic area’s outer boundary.

### Performing hit testing in the region

[`contains(_:)`](/documentation/CoreLocation/CLCircularRegion/contains(_:))

Returns a Boolean value indicating whether the geographic area contains the specified coordinate.


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