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  "title" : "toCoordinateRegion()"
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# toCoordinateRegion()

Returns the region that corresponds to a map rectangle.

```
toCoordinateRegion(): CoordinateRegion;
```

## Return Value

A [`CoordinateRegion`](/documentation/MapKitJS/CoordinateRegion) object that corresponds to a map rectangle.

## Discussion

It’s often easier to work with a map rectangle than a [`CoordinateRegion`](/documentation/MapKitJS/CoordinateRegion).

The following example demonstrates how to convert a [`MapRect`](/documentation/MapKitJS/MapRect) instance to a [`CoordinateRegion`](/documentation/MapKitJS/CoordinateRegion) and back again:

```javascript
const mapRect = new mapkit.MapRect(0.1, 0.2, 0.3, 0.4);

// Return a coordinate region with center (33.841220320476786, -90) and span (106.57400641480324, 108).
const coordinateRegion = mapRect.toCoordinateRegion();

// Return the same map rectangle as mapRect, plus or minus any floating point inaccuracies.
const newMapRect = coordinateRegion.toMapRect();
```

---

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