4.1 Horizontal Coordinate System Definition

MANDATORY IF APPLICABLE

the reference frame or system from which linear or angular quantities are measured and assigned to the position that a point ocupies.

Type:: compound
Short Name:: horizsys

4.1 Horizontal Coordinate System Definition (Mandatory if Applicable)
     CONTAINS
     A CHOICE OF 1 OUT OF 3 ELEMENTS:
     { 4.1.1 Geographic (Mandatory)
     OR
     4.1.2 Planar (Mandatory) (can be repeated unlimited times)
     OR
     4.1.3 Local (Mandatory) }
     AND
     4.1.4 Geodetic Model (Mandatory if Applicable)

     4.1.4 Geodetic Model (Mandatory if Applicable)
          CONTAINS
          4.1.4.1 Horizontal Datum Name (Mandatory if Applicable)
          AND
          4.1.4.2 Ellipsoid Name (Mandatory)
          AND
          4.1.4.3 Semi-major Axis (Mandatory)
          AND
          4.1.4.4 Denominator of Flattening Ratio (Mandatory)

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