# cf.CoordinateReference.identity

`CoordinateReference.``identity`(default=None)

  Return the identity of the coordinate reference.

  The identity is the standard_name of a formula_terms-type coordinate reference or the grid_mapping_name of grid_mapping-type coordinate reference.

  Parameters: | default: optional If the coordinate reference has no identity then return default. By default, default is None.
  Returns: | out: The identity.
  Examples: |

      >>> r.identity()
      'rotated_latitude_longitude'
      >>> r.identity()
      'atmosphere_hybrid_height_coordinate'