As I recall, he has said his wife works at NGS.

I never learned IBM code, having only used it by submitting Fortran card decks, but at one time could program DEC PDP-11 in octal machine language and...

Elevation ... 554 ft away? Hope you know the refraction value really well.

Lenker aka elevation rod. I don’t know why its said to not be as precise as a philly rod. One complaint I read was that the clamping mechanism wasn...

As I read the old text books, it seems that Philadelphia, Chicago,, Detroit, etc. refer to the way the scale is marked, rather than the construction o...

Is that the amount of convergence?

1) Your profile says you are licensed in Michigan. That seems unlikely for someone asking this question, and should be corrected. 2) In many states, ...

I doubt refraction has much effect on a vertical beam unless you are in a situation with air at a different temperature than a vertical wall.

If you make things to last you don't sell as many.

My brother-in-law bought a piece of pasture adjacent to his other land. The GIS shows a strip across it that he doesn't own. I looked up the history a...

From what I remember reading on the forums he was a good surveyor who also demonstrated the potential of GIS done right, and a good human.