old school is to measure points with a drawing compass.
unless you have computerized laser mapping
ChYna will cooperate where it serves their interests, but will never be trustworthy, CCP or no.
I've always maintained that no deals referred to ChYna, even if we make one with them they will break it immediately
CAD-CAM
Computer aided design - computer aided manufacturing.
But to go to 20 feet that's done in clay, then a plaster mold is made over that. For bronze casting at least.
Maybe an auto manufacturer would have a computer controlled sculpting lathe that big but good luck getting them to do it.