The 3 Parameter Molodensky transformation method shifts coordinate values between local and geocentric datums using three linear shift parameters. It provides a general solution with limited accuracy. The 3 Parameter Molodensky method provides a transformation that is accurate to within 5-10 meters.
For a detailed discussion of the 3 Parameter Molodensky algorithms and parameters for a variety of local geodetic datums, please refer to Defense Mapping Agency Technical Report TR 8350.2, 1991 "Department of Defense World Geodetic System 1984: Its Definition and Relationships with Local Geodetic Systems." The 3 Parameter Molodensky method can be defined for local geodetic datums worldwide.