Australia has some excellent documentation on base lines and calibration. Seems counter intuitive to not show data to mms.Historically our government ...

Just out of curiosity, what country are we talking about?

Better than the schist I deal with all day. :laughing:

Auto correct!SOB who invented that died. Restaurant in peace.

I think I have metric micrometer and an extra NI2. I'll pull it out of storage this weekend. It's surplus so I'd be glad to let both go.

I normally check the BS code which is back azimuth, then BC code which is your backsight circle reading. At first glance they seem ok. Then I check AR...

Google "geodimeter machine control". Seems survey grade but faster to track grading machinery. Probably missing survey programs like cogo and traverse...

I'd just set up on the desired point and take line on Alpha Ursae Minoris at culmination. But I guess I'm a Luddite, so....

James, The pen is pointing at Buttermilk and the disk (from memory) is a USGS bench mark.

A Hassler cone! Now that is cool!

Is that a six inch or twelve inch ruler?And WHAT is that as a marker?

Do the arrowheads in the first post image indicate number and direction of observations?If that was the case, some additional work occupying 14 would ...

What's the distance from 2 to 1800? Not that it really matters.You'd need another fix around 1800 or better geometry around 1600 to tighten that up.A...

I found (and by found, meant I was led by an employee of the Rockefeller estate, to) station Buttermilk 1817. He then showed me three reference disks ...

Four things. Funny how the grading bows around East Base. Lucky. And only 4.07 miles long on the base? Seems like a shortie. And great work AGAIN! I ...