POSC Specifications: Epicentre Version 3.0 Logical Data Model

GENERAL_COORDINATE_SYSTEM (Local) (C148, C151)

(Rules) (Express)

Any coordinate system that is not geodetically referenced as part of its fundamental definition. This can be a nonspatial coordinate system or a spatial coordinate system that is not referenced to the Earth except through a reference to an object which is has been geodetically located (i.e., we use the objects geometry as a datum or origin). A system (e.g., a vertical seismic time system) may also be related to the Earth via transform to a coordinate system that is referenced to the Earth. A local spatial system is commonly transformed to a projected system using a 2D affine transformation which involves change of origin, orientation and a differential scale change. General coordinate systems may be 1D, 2D, 3D or nD. A nonspatial system is not descriptive of spatial dimensions, such as a PVT (pressure-volume-temperature) system.


Local rules:

Supertype path(s):

Entity consolidated into table COORDINATE_SYSTEM.

Referenced in Diagrams:


Generated on Tue Jul 10 15:42:37 2001
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