Use the Reference Frame Info view for an overview on the datum the station positions refer to. For each station, it lists the reference frame (Reference Frame) to which the entered station coordinates refer, the tectonic plates (Tectonic Plate) they reside on, and the known offsets (Dx, Dy, Dz in meters) to the reference date due to plate movement. For offsets due to known velocities within the plates see the Velocities view.