RSO

 Projection     : Rectified Skew Orthomorphic
 General class  : cylindrical
 Characteristics: conformal
                : rectangular coordinates (Malaysia)
 Earth model    : ellipsoid or sphere

Defining the MAPUNITS:

 MapUnits "rso"      ! Standard name
 MapUnits "rso e10"  ! Standard name and ellipsoid

Other parameters:

 TrueOriginLongitude "longitude_of_origin"  ! Required, for True origin
 TrueOriginLatitude  "latitude_of_origin"   ! Required, for True origin
 FalseEasting        "false_easting"        ! Optional, default is zero
 FalseNorthing       "false_northing"       ! Optional, default is zero
 Scale               "scale_at_center"      ! Optional, default is one
 Azimuth             "azimuth"              ! Required, azimuth east of 
                                            !    north for central line

Possible errors:

 E100, "Invalid data" - In initializing for the projection, there 
        was an input data error
 E334, "Point cannot be projected" - In converting from geographic 
        coordinates to projection coordinates, the point projects 
        into infinity