Out of curiosity, what is the diameter of the shaft and why do they want two points at the bottom? First image I got from the OP is a storm manhole ...

TTT

I posted this on Thursday, but it needed an assist to display today. Thank you, Wendell.

@ColdAndHungry My sincere condolences on the passing of your father. My father passed a little over a year ago and not a day goes by that I don't thi...

I'd be surprised, Bruce if you didn't check the Kp index today. Everything is fine until the next CME hits later today or tomorrow! 🙂

Actually, it is still available, but buried somewhere in my storage locker. I know that Wendell has a "new" policy of requiring photos. It will likely...

I am interested in the Leica precision prisms if you are willing to sell them separately. If so, leave a reply and I'll post my contact information. E...

I'd be interested in seeing the alphas of the new geoid and DOV grids just to see what I might expect up in the Front Range.

My suggestion is spaceweather.com. Their current forecast is: SOLAR RADIATION STORM IN PROGRESS: An S2-class solar radiation storm is in progress on F...

I know this will come as a shock, but I would suggest you look at placer mineral surveys where some of the lines are (or intended to be) aliquot lin...

Bruce, nothing that needs to be undeleted. I intended to tease you about your reluctance to do what you were told. I ended the post with "geezo, weezo...

In the late 1980s and 1990s I worked in the environmental field as a hydrogeologist. My first position was with Martin Marietta Astronautics Group (no...

Deleted due to my unintended insensitivity. My apology Bruce.

My Leica sales rep told me that if my GS18s sit for a while to place a battery in them for a few hours. Otherwise, I might have to reload the firmware...

I'll start my post with the standard surveyor's refrain, "It depends." I have some old legacy equipment that is currently unusable because the interna...