gmd:MD_PixelOrientationCode_Type

<xs:simpleType name="MD_PixelOrientationCode_Type">
  <xs:restriction base="xs:string">
    <xs:enumeration value="center"/>
    <xs:enumeration value="lowerLeft"/>
    <xs:enumeration value="lowerRight"/>
    <xs:enumeration value="upperRight"/>
    <xs:enumeration value="upperLeft"/>
  </xs:restriction>
</xs:simpleType>