I looked at Bob's observations, and some advice on observation and reduction.This isn't a whole lot of data, but the repeatability looks good.The ques...

What I've found is if the antenna is on a mast, it gets whipped around. And the antenna will be subjected to greater than 4G acceleration. And cycle s...

Moe Shetty, post: 375045, member: 138 wrote: there might be, but i don't know how precise it is. the possible down side ( i think it is a down side)to...

Ever use DraftSIGHT by Dassault? It's a complete, good AutoCAD clone (genuine freeware). It'll create or open dwg and export in PDF. It has paperspsce...

Jim in AZ, post: 374878, member: 249 wrote: Certainly the "clearance box" has more "clearance" than the height of a rail...? It has more clearance. B...

That bridge was brought up under the thread: oops. Could've been one of a dozens reasons. Who wouldn't have ballast, tie, and top of each rail.

The azimuth will not make a numerator of 1 or 0. A geodesic is the true ellipsoidal distance, and orientation of the line is part of that calculation....

On an ellipsoid the azimuth of the line is to calculate the geodesic.However, an average value can used for practical distance reduction to grid, like...

Most hand held GPS have an averaging mode. My Garmin and antique Trimble do. You can accumulate days of averaging. The catch is the UTM output is a me...

Wood would split

So much of the world's commerce has become GPS dependent. And it's without fee. It is a free lunch.

In my favorite 1925 Brit survey text is described longitude by star transit and UT time transfer by telegraph. You have an app for that.

I just looked. It's either oil soaked ebony or ironwood, and maybe later years micarta. But I just looked, and unless I scrape it with a file, it coul...

Using Astro azimuths from stars in all quadrants, it becomes a resection problem.Or, Astro latitude by observing the altitude of a star/sun at meridia...

I worked in KSA for over 9 months, just recently, on a hydro survey along the west coast. GCS project. Never saw anything alarming. Except the way the...

Dan B. Robison, post: 374675, member: 34 wrote: The CLAMP CHUCK:-) I would've bet large that it was micarta.Ironwood?

Dan B. Robison, post: 374562, member: 34 wrote: GDF 6 is metal, wood, and glass...a GDF 22 has plastic/carbon? parts Where are there wood parts in G...

But maybe they transform it in Arcinfo:Oblique Mercator, Hotine Rectified Skew Orthomorphic projection, for Saudi Arabia.

I've only seen the GCS use ITRF in UTM. I found these 2. Funny, one is in Gizan, and the other is in Tabuk. Point number 160. Point number 161.

GDF 6. Primo.