@Rjukan
I surveyed 53 miles of the international border between Canada and the USA just north of Beavercreek, Yukon. Only one week training using a Trimble GPS system. I told the owner of the company if the line is not straight it was his fault for cutting me loose after such a short training period. See if I can dig up pictures. Absolutely amazing ground to cover....like walking on a stair climber on steroids! Suck the knee high boots right off your feet! Helicopter to the line every day just to start work and having to cut landing zones with a Sthil tree trimmer's saw and a machete. The last time the boundary was cut in that area was over twenty years ago. Two man crew that staked middle line and 10' on each side so a cutting crew could clear a 20' border line.
I was more amazed by the 5' brass monuments buried in 3' x 3' concrete boxes place over 100 years ago using chain gains and the old survey equipment and doing the math in their heads. Most of the monuments were 0,0 some were shifted 3/10" and a couple had fallen into the eroded river banks. Now those men were true surveyors! Hauled the brass monuments with donkeys and set the concrete for the cones in who knows what kind of weather.
Oh man, that's incredible! I'm amazed when I find city benchmarks set back in the late 1800s, so cool you found X,Y control out in the middle of nowhere that old. Awesome man, thanks for sharing. I wont complain as much when I'm hacking line through the woods in Staten Island or the Bronx lol.