geoSystemValues

<xs:simpleType name="geoSystemValues">
  <xs:annotation>
    <xs:appinfo>The allowed values of spatial reference frames and earth ellipsoids.</xs:appinfo>
    <!-- Note that strict validation does not occur via schema since MFString allows any value. -->
    <xs:documentation source="http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/geodata.html#Spatialreferenceframes"/>
  </xs:annotation>
  <xs:restriction base="xs:string">
    <xs:enumeration value="GD">
      <xs:annotation>
        <xs:appinfo>Geodetic spatial reference frame</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="GC">
      <xs:annotation>
        <xs:appinfo>Geocentric spatial reference frame</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="UTM">
      <xs:annotation>
        <xs:appinfo>Universal Transverse Mercator</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="AM">
      <xs:annotation>
        <xs:appinfo>Modified Airy</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="AN">
      <xs:annotation>
        <xs:appinfo>Australian National</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="BN">
      <xs:annotation>
        <xs:appinfo>Bessel 1841 (Namibia)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="BR">
      <xs:annotation>
        <xs:appinfo>Bessel 1841 (Ethiopia Indonesia ...)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="CC">
      <xs:annotation>
        <xs:appinfo>Clarke 1866</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="CD">
      <xs:annotation>
        <xs:appinfo>Clarke 1880</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="EA">
      <xs:annotation>
        <xs:appinfo>Everest (India 1830)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="EB">
      <xs:annotation>
        <xs:appinfo>Everest (Sabah & Sarawak)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="EC">
      <xs:annotation>
        <xs:appinfo>Everest (India 1956)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="ED">
      <xs:annotation>
        <xs:appinfo>Everest (W. Malaysia 1969)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="EE">
      <xs:annotation>
        <xs:appinfo>Everest (W. Malaysia & Singapore 1948)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="EF">
      <xs:annotation>
        <xs:appinfo>Everest (Pakistan)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="FA">
      <xs:annotation>
        <xs:appinfo>Modified Fischer 1960</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="HE">
      <xs:annotation>
        <xs:appinfo>Helmert 1906</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="HO">
      <xs:annotation>
        <xs:appinfo>Hough 1960</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="ID">
      <xs:annotation>
        <xs:appinfo>Indonesia 1974</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="IN">
      <xs:annotation>
        <xs:appinfo>International 1924</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="KA">
      <xs:annotation>
        <xs:appinfo>Krassovsky 1940</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="RF">
      <xs:annotation>
        <xs:appinfo>Geodetic Reference System 1980 (GRS 80)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="SA">
      <xs:annotation>
        <xs:appinfo>South American 1969</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="WD">
      <xs:annotation>
        <xs:appinfo>WGS 72</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="WE">
      <xs:annotation>
        <xs:appinfo>WGS 84</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="WGS84">
      <xs:annotation>
        <xs:appinfo>WGS84 geoid</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="Z<n>">
      <xs:annotation>
        <xs:appinfo>Zone number (1..60) (only used with UTM)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="S">
      <xs:annotation>
        <xs:appinfo>Southern hemisphere (only used with UTM)</xs:appinfo>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>