Latitude, in degrees, of the first standard parallel, usually the nothernmost.

Latitude, in degrees, of the second standard parallel, usually the southernmost. This may be the same as PARM1 to obtain a conic with a single point of tangency.

Latitude, in degrees, of the origin of the projection.

Longitude, in degrees, of the origin of the projection.

The false easting to be applied to all X coordinates, selected to cause all X coordinates within the coordinate system to be positive values of reasonable size.