Last seen: January 29, 2025 2:45 pm
Here’s a beautiful thing. MIDDLE 1st order H&V, 1935. I of course took 90 min with Z-12, opus returned 1cm. Then tragedy. It was plowed out jus...
It struck me odd that this AZ mark, std NGS disc, has an NGS PID. But no longer in the DB. I realize it doesn’t have a true position or elevation b...
I found a data sheet! It is published by county survey department. And many of the county control have NGS data sheets. But that doesn’t explain why i...
I occupied CJ8178 because it was published position and elevation. And I was observing to the north. So it didn’t matter which mk I occupied since (wh...
@gary_g mon 97 is nearby. In the box score CJ8178 for some reason the data sheet is gone. I occupied it only 3 yrs ago.
I have seen az mk with approx coords and elevation. But it is near a 2nd order bench line. And posted position in 5 decimal position and mm elevation....
AZ mk CJ8178. The NGS search for that pid returns ‘not found’
@beuckie yeah digital in production has pluses in workflow and speed. Just hate seeing newbie instrument guys working it without understanding more...
@beuckie That was a long time ago. I wouldn’t be using that today for sure. although today in my retirement phase I do shlep a T3 T2 N2 and HP3805 ...
@party-chef Maybe I was lucky. I had a couple of party chief/company owners that were more than a boss. They were well studied practitioners in the s...
@dan-steely ‘add the wires’ !! I always wondered what the benefit of 1/100 yard pattern. I thought it was just to have a pattern that is still dis...
Now you know why a CBL has to be remeasured periodically. I set a 100 baseline with my invar base tape. In asphalt paved shoulder. Not fresh AC, but ...
@geeoddmike Pgs 36-46, section C. The abstract of directions. skim that. It’s a handful.
@geeoddmike obvious point: observer recites the reading and the booker records it. Target reading minus initial reading. Yeah that’s a bit …. My qu...
@james-vianna looking at the symmetry of the microscopes they appear to be 120° apart.
@james-vianna That appears to have 3 microscopes. However there are instruments of differing designs. The 1900 report clearly stated 3, and the USC...