So the old axiom ‘Don’t plant a fence post on a Full Moon’(or whatever it was) actually had a scientific basis! :^)
Back in the 60s, a friends Father worked as an engineer and gave us a tour of the equimpment for making huge shafts and other items. A lathe had an operators car by the tool bit and was a few hundred feet long. The said they had to level it with lasers, because the curvature of the earth made minute, but problematic differences if they leveled it normally. When it was true, a level in the center showed level - put it at either end and it showed the end slightly high.