Last seen: June 7, 2026 1:13 am
The basalts (dark colored volcanic rocks) commonly found in the Portland area do. Quite strongly in many cases.
I'd be using a minimum of 3 points to localize. An exception to this is if I was localizing to provide myself with search parameters for more points ...
It is very common everywhere I've been. Except in B.C. Some guys worry about it a lot, but it only rarely causes a problem. A homeowner is just as lik...
Dittos on the Bernsten Brass Plugs. There are suppliers other than Bernsten as well. You will want to invest in a rotary hammer and the special counte...
Then you might like the book "Logic for Lawyers".
I can assure you that, at least at the city I work at, the PE plans are poured over very thoroughly and checked for compliance with the city's "Engine...
Adding these things doubles your cost? Seriously? That's a stretch. And they don't even have to be presentable on paper. Just present. (1) The foll...
The question would be "how do I convert ellipsoidal heights to orthometric?" The answer, "by applying Geoid 18" Are topos ever recorded? No...
Same here. I just put a collection of notes and symbols like this into the file.
One would be a datum and the other is how you connected your survey to it.
I didn't say that it was without value. Only that I thought that it is overrated. My 1997 reprint has very heavy hardboard core covers and a sta...
I mentioned 4 hr OPUS sessions in that RTK Control Guidelines document. That is still the recommendation from the NGS for OPUS, because the measuremen...
An actual 1930 printed copy of that book will run you north of $400. It has been faithfully reprinted more recently and copies of that version - perha...
To answer question of this nature, IMO, one must delve in to the world of unwritten boundary establishment doctrines. Acquiescence, estoppel, etc. So ...
The residuals on the angles are mostly in the 10" range. That may be appropriate for the instrument in use.
I recently had an instance of a pre-construction survey for a road improvement project where control coordinates were given, a centerline by bearing a...
It appeared on the GIS to be encroaching into city hall property so we have demanded that Trimet move it.
Outstanding job, Gary. Thanks. One quibble. I like to fiddle with the a priori error estimates until I get close to 1 on the combined error factors...