And for added fun if you look up some of the reference points maintained by NOAA they'll list a position, a date, and a velocity. Due to the relative movement b

And for added fun if you look up some of the reference points maintained by NOAA they'll list a position, a date, and a velocity. Due to the relative movement between different parts of the Earth even "fixed" points will be moving so you need to calculate it based off of the velocity and length of time since the position was surveyed. Geodesy is weird.