-34 or -34.4 ?

@azweig?ÿ Names?

They appear to be cast iron with intentionally weak segments to allow the lower portion to remain in place if the top is struck.

Absent any visible sign the monument was disturbed, or soil that is sliding downhill, it's hard to imagine that kind of monument getting shoved around...

Why not leave in on Win7? It may not have what it takes for later OS.

In the original GPS design there were 31 possible pseudorandom codes, and receivers knew how to match all of them. They only needed to learn which cod...

When a new signal component such as GPS L5 is added, the receiver cannot process that component without an update. When a new satellite is launched w...

Despite being standard practice by some, I think ground coordinates should not look like SPC, as well as being clearly explained in the notes.

@half-bubble?ÿ I was responding to a question about verticals.?ÿ Nothing I said was about horizontal. Of course it matters when you have SPC in the m...

NGS works in meters. The DSdata.pdf linked on all NGS data sheets contains this footnote about the orthometric heights in feet: Heights in meters ar...

Somebody set the date by the best they knew, but later scholars reached different conclusions. The date of birth of Jesus is not stated in the gospe...

That may have become the case long after the GPS observations? AH1762'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 2018 (JDW)AH1762'NOT GPS OBSERVABLE, ...