EPSG guidance note #7-2, http://www.epsg.org
This transformation allows calculation of coordinates in the target system by adding the parameter value to the coordinate values of the point in the source system.
Note: These formulas have been transcribed from EPSG Guidance Note #7-2. Users are encouraged to use that document rather than the text which follows as reference because limitations in the transcription will be avoided. Easting_T = Easting_S + easting_offset Northing_T = Northingn_S + northing_offset.