Last seen: April 22, 2025 7:30 am
Next Tuesday (29) we’ll be attending a retirement event for 20 who will be leaving by the end of the month. During my 40+ years at NGS nothing like t...
Your datasheet is good, and I commend your use of pictures and the concise information you present. Assuming you expect this datasheet to be used by o...
All the ancillary marks triangulation marks (RMs & AZ MKs) have PIDs they just don't normally have either an accurate horizontal position or heigh...
"Would they delete old datasheets though?" -- It has to be something exceptionally drastic for NGS to actually delete a station from the Integrated Da...
I was on the NGS datasheet committee for the last 15 years of my service. The vast majority of reference and azimuth marks for triangulation stations...
For NAD 83 only four states (AL, AK, HI and MO) have never legislated a specific foot conversion although in general they all use US Survey Foot. In ...
Oldmanriver and firestix -- New guys! My first work with them was when it still Army Map Service (AMS) in Bethesda.
I had the immense honor to know one of those, Francis Popper who was a young C&GS officer serving at the Manila office during the attack, he was a...
Actually lurker was pretty close. I had the responsibility of automating hundreds of triangulation observations from that period when NGS was buildin...
I hope this will help - a bit long but good history. First as john-putnam noted the HARNs were just different realizations of the original adjustment...
"ultimately the data is WGS84, one of two flavors". Careful there! First of all there have been eight versions of WGS 84, the most current is WGS 84...
Yes, he and I are old friends.
Check with Dave Ingram -- [email protected], I believe he has one for sale.
A historical note, all geodetic control published by U.S. Coast & Geodetic Survey/National Geodetic Survey was referenced to south until the publi...
Get ready the new datums will go live next summer. Big changes coming.
At the heart of any counties system should be the fundamental definitions of the horizontal (geometric) and vertical datums and possibly tidal datums ...