Last seen: June 4, 2026 12:44 pm
@not-my-real-name It occurred to me that I might have photos of one of the stone WCH monuments, and sure enough I found some. Interesting how it was s...
Interesting find. At least in eastern Worcester County, there are also some nice cut-stone WCH monuments.
Speaking of how NGS is spending its time, it looks like NGS is removing some recovery histories. To try the new beta site, I looked up a station I had...
@bill93 I like the canned soup analogy!
It has the appearance of someone prepping a site for a radio / TV / cellular facility to serve the I-81 corridor (but I haven't looked up the detailed...
That quote in the OP seems like a perfectly reasonable statement. They're not talking about accuracy of positioning methods (total station, GNSS, what...
It's a good idea to not stop too close to a railroad crossing. Back around 1984, I had been at my motorcycle dealer in Somerville, MA and was riding i...
In the original post in this thread, I think we're talking about different "realizations" rather than different "epochs." Early NAD 83 realizations di...
@bill93 When you have a chance, no rush, I would be interested to see your writeup. I use the open-source GNU Gama least-squares adjustment package. A...
@joki Indeed it was the typical car magazine flippant writing style.
@dave-karoly Thank you for the information, Dave. It's very cool that you took the time to perform the comparison.
@dave-karoly Dave: I know your comment in this thread was from almost four years ago, but I'm curious if you recall how long your baseline was (total ...
@john-hamilton That's cool that you used Macrometers.
@plumb-bill One detail point: GPS signals are not frequency-modulated. The modulation used is binary phase shift keying (BPSK), to generate direct seq...
@bill93 "Wether" is a new one for me!
@mark-mayer Yes indeed, that's the Trimble document I was recalling. By the way, the graph in the Trimble document appears to have been taken from or...