Originally posted by Jean Poitiers So, I can post Topcon ... ?!
Several years ago my company's first EDM (electronic measuring meter) was a Topcon unit that mounted on top of a theodolite (fancy transit)
We were in hog heaven not having to use a steel tape and plumb bobs for measurements.
It took skill and practice to "plumb up" over a survey mark.
I was operating the transit when our crew chief asked the new guy if he was close in plumbing up over a mark.
The fellow said yes, pretty close, maybe within a couple of hundredths (of a foot)
The crew chief said Well, if a couple of hundredths were taken off the end of your Johnson it would seem like a lot wouldn't it?