Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

• CTProjection : GTIFDefn
• Datum : GTIFDefn
• DefnSet : GTIFDefn
• Ellipsoid : GTIFDefn
• GCS : GTIFDefn
• MapSys : GTIFDefn
• Model : GTIFDefn
• nParms : GTIFDefn
• PCS : GTIFDefn
• PM : GTIFDefn
• PMLongToGreenwich : GTIFDefn
• ProjCode : GTIFDefn
• Projection : GTIFDefn
• ProjParm : GTIFDefn
• ProjParmId : GTIFDefn
• SemiMajor : GTIFDefn
• SemiMinor : GTIFDefn
• UOMAngle : GTIFDefn
• UOMAngleInDegrees : GTIFDefn
• UOMLength : GTIFDefn
• UOMLengthInMeters : GTIFDefn
• Zone : GTIFDefn