SIN

 Projection     : Sinusoidal
 Also known as  : Sanson-Flamsteed
 General class  : pseudo-cylindrical
 Characteristics: equal-area
 Earth model    : sphere

Defining the MAPUNITS:

 MapUnits "sin"      ! Standard name
 MapUnits "sin e19"  ! Standard name and ellipsoid

Other parameters:

 TrueOriginLongitude "longitude_of_origin"  ! Required, for True origin
 FalseEasting        "false_easting"        ! Optional, default is zero
 FalseNorthing       "false_northing"       ! Optional, default is zero

Possible errors:

 E100, "Invalid data" - In converting from projection coordinates 
        to geographic coordinates, there was an input data error