Schema Central > NIEM 3.1 > nga_datum.xsd > nga:DirectionDatumCodeSimpleType
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A data type for a reference direction as determined by the means by which it is established (e.g., by the direction of a geographic or magnetic pole of the Earth).

Simple type information


  • Type based on xsd:token
    • Valid valueDescription
      geodeticReferenced to the direction of the geographic North Pole.
      MagneticReferenced to the direction of the magnetic North Pole.
      militaryGridReferenced to the direction of "north" in a military grid established by a suitable map-projection, for example Universal Transverse Mercator (UTM).
      RelativeReferenced to a direction established by the context of use (for example: the heading of a vessel).
  • Used by

    Type inheritance chain

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