Entity geographic_coordinate_system

• A curvilinear coordinate system based upon a geodetic datum. This coordinate system is defined by the axes of latitude, longitude and height. The latitude of a point is specified as an angle between the equatorial plane and a suitably chosen line thorough the point. The longitude of a point is specified as an angle between the local meridian of the point and the chosen reference meridian, measured in the equatorial plane. The height is the distance between a point and a vertical datum, such as the ellipsoidal surface associated with the geodetic datum.

Attribute                                 Flags   Data Type

From coordinate_system:
   source_reference                       I       ref_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. 

   source                                 MI      ref_source

                                          The provider of this instance of reference information.
                                          If this instance is provided by POSC, then this
                                          attribute must be "POSC". 

   data_collection                        IV      set[0 .. N] of (data_collection)

                                          Indicates the data collections that include this
                                          instance of E and P data. 

   graphical_element                      IV      set[0 .. N] of (graphical_element)

                                          Specifies one or more graphical elements which
                                          are depicting this data item. 

   datum_for_ranking                      IV      set[0 .. N] of (object_ranking)

                                          Indicates that an object is being used as a basis
                                          for comparison with another object. 

   object_of_ranking                      IV      set[0 .. N] of (object_ranking)

                                          Indicates that an object is being classified in
                                          a rank order based on its characteristics. 

   description                            I       ndt_comment

                                          A remark concerning the coordinate system. 

   identifier                             MUI     ndt_name

                                          The identifier of the coordinate system. 

   ref_axis_orientation                   I       ref_axis_orientation

                                          The orientation of the axis with respect to previously
                                          defined axes in the coordinate system. Each coordinate
                                          system may be either "right-handed" or "left-handed".

   ref_coordinate_system_constraint       MI      ref_coordinate_system_constraint

                                          The type of the coordinate system. This type specifies
                                          the number, order and kinds of axes that must
                                          be defined for this coordinate system. For example,
                                          a coordinate system of geographical 2D must have
                                          two axes of latitude and longitude in order. 

   ref_naming_system                      I       ref_naming_system

                                          The naming system in which identifier type and
                                          structure is defined. 

   coordinate_system_axis                 I       unique list[1 .. N] of (coordinate_system_axis)

                                          This is the list of coordinate system axes that
                                          make up this coordinate system. The order of the
                                          axes is significant and is defined by the list
                                          structure of this relationship. An axis may not
                                          be used more than once in a coordinate system.

   earth_surface_feature                  I       set[0 .. N] of (earth_surface_feature)

                                          These are the areas of the surface of the Earth
                                          that are defined as appropriate to use this coordinate
                                          system. 

   vertex                                 I       vertex

                                          This is the origin of the coordinate system, where
                                          all axes of the coordinate system intersect. 

   coordinate_system_alias                IV      set[0 .. N] of (coordinate_system_alias)

                                          Indicates the various identifiers by which this
                                          coordinate system is known. 

   source_for                             IV      set[0 .. N] of (applied_coordinate_transformation)

                                          This describes the set of coordinate transformations
                                          that utilize this coordinate system as a source.

   target_for                             IV      set[0 .. N] of (applied_coordinate_transformation)

                                          This describes the set of coordinate transformations
                                          that utilize this coordinate system as a target.


geodetic_datum                            M       geodetic_datum

                                          This is the geodetic datum that this geographic
                                          coordinate system is based upon. This defines
                                          the surface upon which the coordinate values in
                                          this coordinate system are expressed. 

prime_meridian                            M       prime_meridian

                                          This is the prime meridian for the geographic
                                          coordinate system. 

End of entity geographic_coordinate_system

M - mandatory, U - unique, I - inherited, V - inverse, N - named type