CS2: Coordinate Datums
Entity Relationship Diagram for Epicentre V3.0 Data Model Copyright (C) 2001 POSC, All Rights Reserved.
vertical_datum Each vertical_coordinate_system must be measured from one and only one vertical_datum. vertical_coordinate_system Each vertical_datum may be used by one or more vertical_coordinate_system. datum_kind Each vertical_datum must be a type of one and only one ref_vertical_datum. vertical_datum Each ref_vertical_datum may be referenced by one or more vertical_datum. prime_meridian Each geodetic_datum must be based upon one and only one prime_meridian. geodetic_datum Each prime_meridian may be used to define one or more geodetic_datum. ellipsoid Each geodetic_datum must be based upon one and only one ellipsoid. geodetic_datum Each ellipsoid may be used to define one or more geodetic_datum. geodetic_datum Each geocentric_coordinate_system must be based upon one and only one geodetic_datum. geocentric_coordinate_system Each geodetic_datum may be used to define one and only one geocentric_coordinate_system. geodetic_datum Each geographic_3d_coord_system must be based upon one and only one geodetic_datum. geographic_3d Each geodetic_datum may be used to define one or more geographic_3d_coord_system. geodetic_datum Each geographic_2d_coord_system must be based upon one and only one geodetic_datum. geographic_2d Each geodetic_datum may be used to define one or more geographic_2d_coord_system. spatial_reference Each general_coordinate_system may have as a spatial reference one and only one spatial_object. coordinate_system_reference Each spatial_object may have as a spatial reference one or more general_coordinate_system. datum ellipsoid general_coordinate_system geocentric_coordinate_system geodetic_datum geographic_2d_coord_system geographic_3d_coord_system prime_meridian ref_vertical_datum spatial_object vertical_coordinate_system vertical_datum