Even worse is that (here in Canada at least) we have infrastructure surveyed, its GPS coords recorded, then manually entered into CAD (or similar) drawings usin

Even worse is that (here in Canada at least) we have infrastructure surveyed, its GPS coords recorded, then manually entered into CAD (or similar) drawings using a lot of guess work. Things like metal detectors are used to more or less guess that a detected object is in fact a gas line or something, GPS location is recorded, then someone plays connect the dots in CAD. It's unreal. So many opportunities to introduce error, and the initial locating of the underground object could easily be incorrect. I know newer infrastructure is more diligently recorded, but there is a TON of old crap in the ground ready to be ripped up.