POSC Specifications: Epicentre Version 3.0 | Relational Implementation |
This refers to a node in a geophysical data array or grid. A node may represent a boundary of a geophysical geometry segments. It also allows, for example, the semantics of a particular note which is represented by a vertex to be used as the origin for a coordinate system. This entity is not intended to substitute for the array attributes (e.g., location) in the geophysical processing grid or the geometry set.
- instance_s (PK, M: CHAR VARYING(19))
- Surrogate key of the table.
- identifier (M: CHAR VARYING(80))
- earth_feature.identifier
The identifying name for the earth feature.
- instance_create_date (O: TIMESTAMP)
- e_and_p_data.instance_create_date
This is the date that this instance was created. This date is defined by the source if imported, or is the date the instance is created if a new instance.
- last_updated (O: TIMESTAMP)
- e_and_p_data.last_updated
This is the date that this instance was last updated. This value should be updated when any part of this instance is altered (except for inverse relationships).
- entity_type_nm (M: CHAR VARYING(30))
- Column that contains the name of the entity that this row is an instance of in case a table represents multiple entities. Possible values are: geophysical_acquisition_point, geophysical_processing_point.
- description (O: CHAR VARYING(2000))
- e_and_p_data.description
A remark or comment about the instance.
- grid_line_index (O: INTEGER)
- geophysical_processing_point.grid_line_index
The "line index" value on the processing grid of the node that this point represents.
- grid_point_index (O: INTEGER)
- geophysical_processing_point.grid_point_index
The "point index" value on the processing grid of the node that this point represents.
- instance_creator (O: CHAR VARYING(80))
- e_and_p_data.instance_creator
This is the person, company or application that created this instance. This identifies the party responsible for loading this instance.
- last_updated_by (O: CHAR VARYING(80))
- e_and_p_data.last_updated_by
This records the person or application making the update to this instance.
- node_uid (O: INTEGER)
- geophysical_acquisition_point.node_uid
Defines the uid value of the node that this point represents. This value must match a value in the corresponding attribute of the geometry set. The corresponding attribute is implied by attribute kind.
- source (O: CHAR VARYING(80))
- e_and_p_data.source
The provider of this instance, which is usually a data provider for imported/purchased data. If this instance is provided by POSC, then this attribute must be "POSC".
- source_content (O: CHAR VARYING(80))
- earth_feature.source_content
This is the original source of the data. This is the person, company or application that defined or specified the data (content) for this instance and is considered to be responslble for it. For example, POSC, EPSG, API, ISO, etc. This may be the same as or different from the provider of the instance (e.g., POSC).
- source_reference (O: CHAR VARYING(2000))
- earth_feature.source_reference
The reference used by source to provide the standard instance, such as Petroleum Industry Data Dictionary (PIDD), Websters Ninth New Collegiate Dictionary, etc.
- status (O: CHAR VARYING(11))
- earth_feature.status
The status of this instance in the version of Epicentre running in a data store. This is an enumerated datatype for which the following are the possible values: current, provisional, deprecated. Current - use without restriction. Provisional - use with caution, this value is for comment and may not appear in future releases of Epicentre. Deprecated - avoid use if possible, it is planned to remove this value in the next major release of Epicentre.
- surface_only (O: CHAR(1))
- earth_feature.surface_only
When set to TRUE, this earth_feature represents only the surface of the Earth and does not extend into the subsurface.
- geometry_set_s (FSK, O: CHAR VARYING(19))
- geophysical_acquisition_point.geometry_set
Specifies the geometry set which contains the array whose node is being referenced by this instance. For example, the geometry set which contains the source event uid attribute that the specified uid value is a part of.
Defines a foreign key to table geophysical_geometry_set.
- kind_s (FSK, O: CHAR VARYING(19))
- earth_feature.kind
The class which asserts the fundamental nature of the feature.
geophysical_acquisition_point.kind
Defines the type of array that the node uid represents. This values implies a particular attribute in the associated geometry set. For example, "seismic station" implies that the node represents a node in the array structure defined by attribute seismic station uid.
Defines a foreign key to table earth_feature_class.
- naming_system (FNK, O: CHAR VARYING(80))
- earth_feature.naming_system
The naming system in which the identifier is defined and unique.
Defines a foreign key to table naming_system.
- processing_grid_s (FSK, O: CHAR VARYING(19))
- geophysical_processing_point.processing_grid
Specifies the processing grid which contains the node which is being referenced by this instance. The grid point index and grid line index values must be defined index values in the associated processing grid.
Defines a foreign key to table geophysical_processing_grid.
- unique_within_s (FSK, O: CHAR VARYING(19))
unique_within_t (O: CHAR VARYING(30))
- earth_feature.unique_within
This is another earth feature within which this earth feature is uniquely identified.
unique_within_s: Implements a foreign key to a row in one of the tables projected from entity earth_feature depending on the value of the next column (See below).
unique_within_t: Defines the name of the referenced table. Possible values are defined in @earth_feature.
- version_s (FSK, O: CHAR VARYING(19))
- earth_feature.version
This describes the version of this instance as defined by the provider.
Defines a foreign key to table r_version.
Table is related to: activity, business_assoc_earth_ftr_role, contract_object_designation, contract_oblig_object_fulfil, coordinate_system_earth_usage, data_collection_content, derived_interest_makeup, document_specification_part, @earth_feature, earth_feature_alias, earth_feature_classification, coordinate_system, geophysical_geometry_segment, @graphical_element, guideline_compliance, bulk_material, naming_system_area, object_activity_involvement, object_remark, object_subject_to_guideline, p_magnetic_declination, p_magnetic_inclination, space_time_operation, spatial_object, subject_of_contract, topological_relationship, transformation_earth_usage, well_log, well_log_trace
Primary Key Constraint on: INSTANCE_S
Generated on Tue Jul 10 16:34:15 2001
© Copyright 2001 POSC. All rights reserved.