POSC Specifications: Epicentre Version 3.0
Logical Data Model
ENTITY
GENERAL_COORDINATE_SYSTEM
(* Local *)
SUBTYPE OF
(
simple_coordinate_system
);
local_context :
OPTIONAL
topological_object
;
origin_location :
OPTIONAL
ndt_location
;
ref_display_orientation :
OPTIONAL
ref_display_orientation
;
spatial_reference :
OPTIONAL
spatial_object
;
INVERSE
grid_convergence_reference :
SET [0:?] OF
pty_grid_convergence
FOR
local_coordinate_system;
UNIQUE
si:
technical_reference
.identifier, local_context;
WHERE
val: SIZEOF(coordinate_system_axis) = SIZEOF(ref_coordinate_sys_constraint.axis_type);
val2: NOT (EXISTS(spatial_reference) AND EXISTS(spatial_reference));
END_ENTITY
; (* general_coordinate_system *)
Generated on Tue Jul 10 19:37:54 2001
© Copyright 2001 POSC. All rights reserved.