cf.CoordinateReference.canonical_units¶

classmethod CoordinateReference.canonical_units(term)[source]¶

Return the canonical units for a standard CF coordinate conversion term.

Parameters:	term: `str` The name of the term.
Returns:	out: `cf.Units` or `None` The canonical units, or `None` if there are not any.
Examples:

>>> cf.CoordinateReference.canonical_units('perspective_point_height')
<CF Units: m>
>>> cf.CoordinateReference.canonical_units('ptop')
None