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@mightymoe If you take the RTX ITRF current epoch coordinate and run it through HTDP you will get the (AFAIK) transformation that OPUS is doing.

  This is the OPUS for the point, as you can see the EPOCH is 2026.6928, which is the same as RTX. I didn't keep that coordinate since I'm not concerned in ITRF only NAD83 because this was a check on existing control and unfortunately RTX didn't send the NAD83 number.

OPUS (and RTX) return ITRF2020 at the current epoch. The ".6928" is a fraction of a year. I maintain that 2 (or maybe 3) decimals is sufficient to define a fractional part of the year, so it could be 2026.69 imo The transformation is to bring the ITRF2020 current epoch position to what NATREF is g...

@mightymoe By my calculations the 2026.6928 would be 10 September 26 at around 9 pm UTC or 3 pm MDT. I am not sure of the conventions they are using for that decimal part; my only check is that at 0 hrs UTC on 01 January 2026 my calculation method shows the epoch as 2026.0000. No clue if that...

It's going to be interesting for sure. The last opus and TBC data I got from OPUS and RTX declared the ITRF 2020 EPOCH to be 2026.6928. Does that imply that there are 6928 EPOCH in 2026? or is that nomenclature indictive of something else? AI declared that 2026.6928 means data was collected Sep ...

I would think an owner occupancy / no renters covenant would be viable.

I'm not sure what kind of (constitutional) CC&Rs one could write to prevent this sort of thing. Better to enter into an agreement with a builder and construct and sell homes instead of selling vacant lots.

I did some testing over the weekend, I connected to the service, it very quickly initialized, and I output GGA at 1s for a few days. I still need to analyze the data that I collected. A quick look does show a few jumps (I am mostly concerned with the vertical), but mostly very stable. My house/o...

In the PLSS Witness Corners are online corners, depending on the type of corner they witness they may be an angle in the Section line or the record distance will be extended to the corner passing over the WC. Offline trees marking a corner are called bearing trees. Normally they are accessories and ...

I never liked the term 'witness corner'. Something like 'line marker' would be better. Until 1940, surveyors in my area still marked 'witness trees' to preserve corner locations. These witness trees were not online. I did this myself in a few locations. A cotton spindle was placed in the side of a t...