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# units

The measuring system — imperial or metric — to use for units.

```
var units: MKDistanceFormatter.Units { get set }
```

## Discussion

You can use this property to explicitly set the measuring system for units. The default value of this property is [`MKDistanceFormatter.Units.default`](/documentation/MapKit/MKDistanceFormatter/Units-swift.enum/default), which bases the measuring system on the user’s locale.

---

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