For anyone who might be wondering about "HPGN":     For a list of HARN and FBN dates, you can visit the NGS NCAT tool: and ...

@peter-lothian That's interesting about the Tuttles setting monuments on new corners. Did they tend to show those monuments on plans or describe them ...

@peter-lothian So I'm not the only person who finds the work of Horace and Harlan Tuttle "amusing"? A few years ago, I saw a 1971 plan stamped by Harl...

@williwaw Interesting; I had not known about Dombey. But while that woodworking website says that Dombey's standards were thrown overboard, a post in ...

@not-my-real-name The "three little lines" is quite special!

For what it's worth, NOAA Manual NOS NGS 9, "User Guidelines for Single Base Real Time GNSS Positioning," from 2014, says "Recommendations: Do not try...

@murphy Regarding the average Joe, or the unsophisticated, or the uneducated, it could be argued that their understanding of US Customary (or similar)...

@james-vianna I considered mentioning that mission in my previous comment, but US Customary units themselves were not necessarily the root cause of th...

@john-hamilton Your "internal" use of metric units makes me think of the Apollo Guidance Computer used to get to and from the Moon and to land on and ...

Quick, without looking — tell me how many teaspoons are in one-quarter of a cup! Are we talking about pounds force, pounds mass, or slugs? I wonde...

@big-al If you're using the Canadian NRCAN CSRS-PPP online system, don't you need to run the results through NGS's HTDP before using NCAT? CSRS-PPP ou...

@bobwesterman I had the same thought.

@eapls2708 I too liked the wall in that photo. The curve and the good condition give me the impression is that it's a modern wall rather than one from...

@peter-lothian

@scott-in-indianapolis @stacy-carroll @bstrand In Massachusetts, at least one town has a zoning bylaw that requires fences in residential districts ...

@gary_g Nice find, thanks. I’m sure that’s the same author as one of my favorite historical articles, “History and Development of Triangulation in Mas...

@peter-lothian That's a nice plan. I'm trying to remember if I've seen that road stone when driving and making a left turn from Wayside Inn Rd onto Su...

@jmcnicholspls Yes, those are the typical road stones. For various other reasons, I'm thinking that the stone bound I found was probably not a road st...