Last seen: June 4, 2026 6:02 pm
I'm pretty sure that Apple does not allow access to those interesting data about what the iPhone's GNSS receiver is doing (and I say this as an iPhone...
@james-fleming That is a valid point.
That is an interesting article; thanks. I can relate to a similar trend in electronic test equipment. I work in electrical / electronic / software eng...
@loyal For sure, the DKM 1 is adorable.
Some English archaeologists are aware of proper surveying techniques. There's a very nice tutorial from the Historic England organization called "Trav...
The Borden survey was very cool stuff. In 2002, a friend and I recovered one of its stations, which is also an NGS station. The data sheet says that t...
@norman-oklahoma Some distance meters / laser rangefinders, like my Leica Disto X4, have a mode for continuous readings with recording of minimum and...
@mathteacher Bowditch: One of my favorite books, since I was a kid.
@bill93 The four prices I quoted were in automatic search-match emails from Abebooks.
Agreed about how a physical book is nice sometimes. By the way, a couple of years ago for my birthday, my wife bought me a copy of Donald Wilson's "De...
Sometimes a physical book is very pleasing, but for anyone interested primarily in the content, a free PDF is available from BLM:/p>
I've never seen either of the standards in their entirety, but my strong impression is that they have somewhat different procedures for determining th...
@mightymoe Speaking of DOTs / Highway Departments: Seen in Lancaster, MA. This sign has been there for years now. ?ÿ
The offset of a nodal prism is dependent upon the diameter of the prism. So if you're using different sizes of nodal prisms (e.g. a 62-mm diameter pri...
@bill93 ????
@geeoddmike I knocked on the door of Prof Strang's house and bought, face-to-face, a copy of his "Linear Algebra, Geodesy, and GPS" book when it came...
No, I've not used any of the baselines. The nearest one to me is in Marlborough, MA, in the median of an Interstate highway. If it's where I think it ...
That's an odd statement from the service manager, about not being able to adjust the frequency of the 690nm laser diode. The frequency of the (infrare...