globalmapper.AddCustomDatum =========================== .. currentmodule:: globalmapper .. py:function:: AddCustomDatum (GM_DatumInfo_t aDatumInfo) -> GM_Error_t32, DATUM Adds a new custom datum definition based on the provided GM_DatumInfo_t structure. The datum code assigned for the new datum is returned. If a custom datum with the same name already exists, the parameters for that datum will be updated. :param GM_DatumInfo_t aDatumInfo: Information about datum transformation to add :returns: Error Code :rtype: GM_Error_t32 :return: Datum code assigned to new custom datum :rtype: DATUM