code: def to_cartopy(self):
          
          globe = self.cartopy_globe
          proj_name = self._attrs['grid_mapping_name']
          try:
              proj_handler = self.projection_registry[proj_name]
          except KeyError:
              raise ValueError('Unhandled projection: {}'.format(proj_name))
  
          return proj_handler(self._attrs, globe)
docs: Convert to a CartoPy projection.