Official PRS92 Transformation Parameters For GPS users, the following transformation parameters will be necessary when undertaking local surveys. They relate the WGS84 Datum, to which all GPS data is referenced to PRS92 on the Luzon Datum. These parameters are applied to WGS84 geocentric cartesian coordinates to give cartesian coordinates of the PRS92 datum which will then be transformed to geographical PRS92 coordinates. Transformation parameters (WGS84 to PRS92): Delta X = 127.62153 meters Delta Y = 67.24339 meters Delta Z = 47.04738 meters Rot X = 3.06803 seconds Rot Y = 4.90297 seconds Rot Z = 1.57807 seconds scale parameter = 1.06002 Transformation parameters (PRS92 to WGS84): Delta X = 127.622 meters Delta Y = 67.245 meters Delta Z = 47.0433 meters Rot X = 3.068 seconds Rot Y = 4.903 seconds Rot Z = 1.578 seconds scale parameter = 1.06002 The general similarity transformation formula that relates two sets of coordinates is shown below:
