UTM coordinates and height of survey control marks. The UTM coordinates are expressed in terms of both the Australian Geodetic Datum 1966 (AGD66) and the Geocentric Datum of Australia 1994 (GDA94). Height information is expressed relative to a number of datums. The quality of control mark coordinate information is expressed in terms of Class and Order. Attribute information may include the mark type, date established, access type and comments on condition. An abbreviated description of any visible target is included. Mark status indicates if control mark has been reported not found, or is destroyed but the reference marks still exist.