I'm not convinced this is correct.  ```get_extent``` with no specified crs gives you the extent in the axes's projection. You are requesting the map in EPSG:4326 which (please correct me if I'm wrong) is a geodetic crs with a wgs84 globe i.e. ```cartopy.crs.Geodetic()```. You pass these numbers to ```getmap()``` in the ```bbox``` kwarg. I'm assuming that this kwarg is expecting lats and lons.