^^^^lol that was a quality video
Im a union surveyor, the curve of the earth isnt factored in when laying out a structure or a small job. But when laying out a road or a job with tight tolerences the curve of the earth is always factored in.
I did the Buffalo airport runway extention, the blacktop tolerence had to be within .02 of the designed final grade over then entire length of the runway. When we did an initial benchmark run prior to construction, we found that the certified grades were off 0.17 from one side to the other. This was because the curve of the earth was not factored in for the initial design.