A reference object that describes the position, orientation and scale relationships of a reference ellipsoid to the Earth. Modern geodetic datums are defined with respect to the center of the Earth, while historical geodetic datums are defined with respect to fundamental points on the surface of the Earth.

geodetic_datum_s (PK, M: CHAR VARYING(19))

Surrogate key of the table.


geodetic_datum_id (M: CHAR VARYING(80))

geodetic_datum.identifier
The code or full name of a geodetic datum. This should be the code of the geodetic datum, when available, or may be the full name of the geodetic datum when a code is not defined.


ellipsoid_id (FNK, M: CHAR VARYING(40))

geodetic_datum.ellipsoid
This designated the ellipsoid that describes the surface of the geodetic datum. This ellipsoid is positioned with respect to the Earth to define the geodetic datum.
Defines a foreign key to table ellipsoid.


source (FNK, M: CHAR VARYING(40))

reference_behavior.source
The provider of this instance of reference information. If this instance is provided by POSC, then this attribute must be "POSC".
Defines a foreign key to table r_source.


description (O: CHAR VARYING(2000))

geodetic_datum.description
The definition of the geodetic datum.


status (O: CHAR VARYING(11))

reference_behavior.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.


r_naming_system_kd (FNK, O: CHAR VARYING(40))

geodetic_datum.ref_naming_system
The naming system in which the identifier is defined.
Defines a foreign key to table r_naming_system.


source_reference_s (FSK, O: CHAR VARYING(19))

reference_behavior.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.
Defines a foreign key to table r_source_ref.


version (FNK, O: CHAR VARYING(40))

reference_behavior.version
Describes the version of Epicentre when this status was assigned to this instance of reference behavior
Defines a foreign key to table r_epcnt_version.