An earth point which is constrained to be located in close proximity to the surface of the Earth.

earth_model (I, V: SET[0:?] earth_model(spatial_object))

Indicates various earth models which include this spatial representation. Each earth_surface_point may be part of one or more earth_model. Inherited from spatial_object.


edge (I, V: SET[0:?] edge(vertex))

Defines the edges for which this vertex forms part of the boundary. Each earth_surface_point may bind one or more edge. Inherited from vertex.


intersection_role (I, V: SET[0:?] space_time_operation(intersecting_object))

Indicates a space/time operation for which the object is involved as an intersecting agent. For projection, this is the screen on which an object is being projected. For proximity, this is the magnet object. Each earth_surface_point may be the intersecting object for one or more space_time_operation. Inherited from topological_object.


local_vertical_datum (I, V: SET[0:?] local_vertical_datum(earth_point))

Indicates the usage of this earth point to establish one or more vertical datum planes Each earth_surface_point may intersect one or more local_vertical_datum. Inherited from earth_point.


observed_baseline (V: SET[0:?] observation_definition(baseline_node))

This defines the set of observations where this point was the baseline node for a positioning facility. Each earth_surface_point may be baseline node in one or more observation_definition.


observed_reference (V: SET[0:?] observation_definition(reference_node))

This defines the set of observations where this point was the reference node for a positioning facility. Each earth_surface_point may be the reference node in one or more observation_definition.


other_composite_spatial_object (I, V: SET[0:?] other_composite_spatial_object(composite_object))

Defines the set of composite spatial objects of which this spatial object is a component. Each earth_surface_point may be a component of one or more other_composite_spatial_object. Inherited from spatial_object.


primary_role (I, V: SET[0:?] space_time_operation(primary_object))

Indicates a space/time operation for which the object is involved as a primary agent. For degeneration, this object is being degenerated. For projection, this object is being projected onto another object. For proximity, this is the container object. Each earth_surface_point may be the primary object for one or more space_time_operation. Inherited from topological_object.


primary_topological_relationship (I, V: SET[0:?] topological_relationship(primary_topological_object))

Indicates a topological relationship in which the topologic object has the role of primary agent. For an object intersection type of "inside" this is the containing role (e.g., if a city is inside a county then the county would be the primary agent). For all other object intersection types the roles are symmetrical and both relationships must be searched for a particular object. For example, if a wellbore and a formation overlap then either could be chosen as the primary agent with the other chosen as the secondary agent. Each earth_surface_point may be primarily involved in one or more topological_relationship. Inherited from topological_object.


pty_magnetic_declination (V: SET[0:?] pty_magnetic_declination(earth_surface_point))

Each earth_surface_point may have a property of one or more pty_magnetic_declination.


pty_magnetic_inclination (I, V: SET[0:?] pty_magnetic_inclination(earth_point))

Each earth_surface_point may have a property of one or more pty_magnetic_inclination. Inherited from earth_point.


secondary_topological_relationship (I, V: SET[0:?] topological_relationship(secondary_topological_object))

Indicates a topological relationship in which the object is in the role of secondary agent. For an object intersection type of "inside" this is the contained role (e.g., if a well is inside a field then the well would be the secondary agent). For all other object intersection types the roles are symmetrical and both relationships must be searched for a particular object. For example, if a wellbore and a formation overlap then either could be chosen as the secondary agent with the other chosen as the primary agent. Each earth_surface_point may be involved in one or more topological_relationship. Inherited from topological_object.


source_space_time_operation (I, V: BAG[0:1] space_time_operation(resulting_object))

Indicates the space/time operation from which a topological object was the result. For addition, this is the union of two objects. For degeneration, this is the degenerate object. Each earth_surface_point may be the result of one space_time_operation. Inherited from topological_object.


vertical_datum_offset (I, V: SET[0:?] vertical_datum_offset(earth_point))

These are the offsets between vertical datums that are defined as passing through this point. This earth point is being used to locate the offset. Each earth_surface_point may be used to define one or more vertical_datum_offset. Inherited from earth_point.

Local rules:

Abstract supertype:
Each EARTH_SURFACE_POINT must be instantiated as one of its subtypes. These subtypes are: facility_reference_point, general_earth_surface_point, legal_survey_point, seismic_acquisition_vertex, seismic_facility_node, seismic_processing_vertex, well_surface_point
Supertype path(s):
topological_object > spatial_object > simple_spatial_object > vertex > earth_point > earth_surface_point.

Entity replicated into subtype tables (@earth_surface_point).

Referenced in Diagrams:

• CT2: Earth Surface Topology (0712)
• CT4: General Positioning
• GPA4: Marine Positioning