We are changing a coordinate system in an existing TBC project. The office entered grid coordinates are changing by -408mm in the easting and +332mm in the northing when the coordinate systems are changed.
TBC Project with coordinate system "A". This project contains a site calibration with horizontal and vertical parameters.
This is the same TBC Project, but it contains a new coordinate system "B". This project contains no horizontal or vertical calibration parameters.
Is there a reason why the grid coordinates have changed? I would have thought the grid coordinate (set to control status) should be the same in all projects irrespective of any coordinate system selected?