POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
GEODETIC_DATUM
(* Open *)
SUBTYPE OF
(
datum
);
ellipsoid :
ellipsoid
;
prime_meridian :
prime_meridian
;
INVERSE
geocentric_coordinate_system :
SET [0:1] OF
geocentric_coordinate_system
FOR
geodetic_datum;
geographic_2d :
SET [0:?] OF
geographic_2d_coord_system
FOR
geodetic_datum;
geographic_3d :
SET [0:?] OF
geographic_3d_coord_system
FOR
geodetic_datum;
UNIQUE
si:
technical_reference
.identifier, prime_meridian;
END_ENTITY
; (* geodetic_datum *)
Generated on Tue Jul 10 19:37:55 2001
© Copyright 2001 POSC. All rights reserved.