POSC Specifications Version 2.2 Epicentre Logical Data Model

0712 There is no Earth surface subclass of composite spatial object.

For earth surface features which contain multiple discrete surface areas, spatial representation is not supported. We need an Earth surface composite position. A lease may specify multiple, non-contiguous surface areas. See Position in wellbore, position in earth model, for analogues.

Add general_surface_composite entity.

A new entity general_surface_composite was added as a subtype of composite_spatial_object and position_on_earth_surface to represent composite spatial objects on the surface of the Earth. An optional many-to-many relationship was added to describe the parts/assembly relationship.

Added objects:
general_surface_composite (Entity)
general_surface_composite.be_composed_of (Attribute)
position_on_earth_surface.be_part_of (Attribute)
pty_geometry_2d_ring.general_surface_composite (Attribute)

Modify diagrams

Add the new entity general_surface_composite to existing diagrams.

Modified objects:
CT2:_Earth_Surface_Topology (Diagram)
EMG4:_Earth_Model_Objects (Diagram)


Generated on Mon Dec 1 10:15:06 1997
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