myozone

Ok Simple question, how are vertical (on walls) benchmarks used ?. I live in France and have found several of the and most seem to be mounted on walls i.e vertical surface, so how are they used ? (guessing at a distance with theodilite?). Ones on the ground obvious! Or are they 'just' used for leveling ? Dave

Thats it ! Thanks Jeff off out to take some pictures ! Dave...

Anyone know on where I can find a list on French benchmarks ? Dave..