---
title: westLongitude
framework: mapkitjs
role: symbol
role_heading: Instance Property
path: mapkitjs/boundingregion/westlongitude
---

# westLongitude

The west longitude of the bounding region.

## Declaration

```data
westLongitude: number;
```

## See Also

### Defining a bounding region

- [eastLongitude](mapkitjs/boundingregion/eastlongitude.md)
- [northLatitude](mapkitjs/boundingregion/northlatitude.md)
- [southLatitude](mapkitjs/boundingregion/southlatitude.md)