Last seen: June 6, 2026 5:10 pm
I tried to post my kmz file Don't know if the trick works here, but many places you can rename it xxxx.kmz.txt to post and the other person can dow...
@dmyhill Sure, if they are closely enough matched the curvature cancels. And the refraction sort of cancels, but probably not as well.
Balancing backsight and foresight distances at least approximately is important. This doesn't have to be precise if you do the refraction and curvatur...
Friday here in eastern Iowa the smoke had cleared a lot. We had several days of haze that limited visibility for aviation and I could see that it was ...
Take a peak at Is somebody on a mountain? Jr. Spelling Police
There might be differences between states that should require passing the state-specific exam. Going from one New England state to another would be th...
@flga-2-2 Welk's band played around the midwest in the 1930's and 40's. The story is told about a businessman in my hometown who was a regular atten...
@flga-2-2 That song just doesn't sound like one LW's audiences would approve.
Useless drivel. It still doesn't mention deflection of the vertical or Laplace correction, which any surveying textbook would discuss in this regard. ...
ChatGPT said: astronomical north, also called celestial north or astronomical true north, refers to the direction of the celestial north pole. It is ...
earth based X Y Z coordinate That is in ITRF or WGS84. All the other expressions are conversions done in your hardware/software. An autonomous pos...
Do you want the results to be in a projection system (assuming the GNSS solution was expressed in a flat projection) or on ground? The scaling could t...
To distinguish between NAD83 (2011) and other NAD83 realizations, a survey-grade GNSS receiver relies on the metadata embedded in the navigation messa...
True or Astrnomic North I would expect that the users of this information want azimuths with respect to geodetic north. We had a thread recently wh...
We had almost this same discussion in 2012 and 2013 where somebody was trying to hold 2 cm accuracy on aquifer monitoring wells over quite a few miles...