Hi,

I believe that as of now PS is only able to apply 7 parameters datum transformation however to consistently transform from WGS84 to ETRS89 it is necessary to input time based parameters (14 parameter transformation).

If I´m correct now PS assumes the datum transformation between WGS84 and ETRS89 as X:0 Y:0 Z:0 rX:0 rY:0 rZ:0 ppm:0 which is acceptable if metric accuracy is sufficient but is not acceptable for survey work (sub centimetre).

Thanks for your time and effort.

Isaac