Thanks very much, looks like exactly what I need! Since I started my own business in 1997 I have been archiving to CD's and later to DVD's. Now, with ...

This is why we need eLoran as a backup...but the US government doesn't seem to be taking any action on it.

It sounds like TBC might be set to precise ephemeris only, and you did not load a precise ephemeris. Make sure it is set to automatic or broadcast or ...

Here is one from yesterday's job site

How far out of tolerance is it? It might mean you have a problem with the points you are using, maybe one is incorrect name?

You are correct: Planned Obsolence But, using my software converts the dat file back to usable again. Something they could have done very easily.

Pillars are great. I really admire the UK for having established those. Many (most) of the 39 USACE dams we monitor have pillars. I started out survey...

Skeeter1996, post: 368687, member: 9224 wrote: John,The Fixweek tells me I have outdated files and asks me if I want it to update them. I answer OK, i...

There is an observing procedure called Black's Azimuth which will directly yield a geodetic azimuth with no laplace correction. This was an advantage ...

Just a thought...sometimes software expects decimal degrees, other times DD.MMSSsssss, etc. without it being labeled, and watch the sign of the longit...

Is it possible your base position is not correct? for every 6 meters or so of error at the base, that causes a 1 ppm error at the rover. If you are fa...

I think that was a problem...I only heard about it a month ago because I receive the FIG email newsletter. They definitely should have coordinated wit...

I did in the days before GPS, but who actually has a sight that long anymore? Well, I take that back...I have used towers, spires, tanks, etc very far...

I was about to admit maybe I was wrong, that it was NAD (just NAD) that used MEADES RANCH, but I think USSD and NAD are the same.

if I recall correctly the two datums (USSD and NAD27) have the same origin coordinates at MEADES RANCH, but the starting azimuth was SLIGHTLY differen...

base9geodesy, post: 364539, member: 7189 wrote: As previously pointed out, the U.S. Standard Datum/North American Datum is not NAD 27. In reviewing t...

Scott: The NGS has all of the old observations in their database. I used to have access to it via telnet to be able to retrieve the obs, but not any l...