Angle Left

How about deflection angles? Any notation can be used in a description that can be followed, it might not be the norm, but if you can follow it, there is nothing really wrong with it other than you don't like it. Ran a traverse around a mountain section once by myself, I left the equipment and only carried my pack and the EDM battery back and forth until I got back to where there was a road. The guy I was doing it for was trained as a route surveyor and I was required to use deflection angles, wrote the first in the field book then accumulated three more using upper and lower plates, then recorded the total. Worked fine but I had to pay very close attention to the lefts and the rights in the field book and I did not like that method.
jud

yeah, they're just numbers... it's like getting mad at someone for measuring in poles/rods/chains/links.

So long as you know, whats' the difference?

The whole time I worked for BLM I don't think I ever turned an interior angle. Deflection angles and double centering is the way to go running Section lines.
Tried to stick with deflection angles right though.
Since I went private, I've only rarely turned a deflection, even when running a straight line.
But, then again, it depends on what you're used to.
DJJ

Hmmmm, when I was in the field for BLM, I never turned a deflection angle...only interior angles to the right.

And of course, double centered when running line.

Keith

>.... Tried to stick with deflection angles right though.
?
would you turn defl angle 352º 03' 18" instead of a deflection left? How do you "try to stick with deflection angles right?"

I can do one better than that. I'd like to build a time machine and go back to about 1990 and kick the SOB in the head that designed the GTS 303 with the Angle Left/Right button the same as the meter/feet button.

We only busted a few loops due to this, and always on a line where the damn angle was close to 180 so the Party Chief couldn't "catch it".

We "caught it" several other times but it was where it was VERY noticeable.

I feel your pain.

I retraced a pipeline one time trying to find the old iron stakes by deflection angle. It was different. I had never worked with deflection angles so I would zero the gun, flip the barrel, and turn either right or left whatever the deflection angle was. Keeping it straight in my head was a trick but didn't take long to catch on to. Found all of the iron stakes as offsets to the pipeline though using their method they set them with.

> >.... Tried to stick with deflection angles right though.
> ?
> would you turn defl angle 352º 03' 18" instead of a deflection left? How do you "try to stick with deflection angles right?"

OOps Wrong...again, Trying to do too many things at the same time.
No we'd turn defl right or left. When I started out (Oregon) we'd run a straight line and deflect around trees, measure from the tree to the stake (to check the math), set up over the stake and deflect back to a parallel line. Keep track of the offsets, add/subtract your proportional offset from the corner you ran to to your turning pts., then pull off of the stake on the run back to get you true line to blaze to. And yes you'd run it all through a traverse sheet and check your Northings-Eastings and closure, taking convergence into account.

I'v always tried to stick to interior angle right, but that isn't always the cas either.

DJJ

It is no problem, just a minor pain that makes a working on a deadline that much more fun.

My new motto - "I'm just glad to be working."

I don't think that I've ever seen a description or plat with deflection angles period, but I don't remember a lot of things these days.

When I started in the late 60s with the USFS, we were using transits, and deflection angles (left/right) were the norm. We also read the Compass fore/aft to catch left/right booboos though (it worked well).

Since graduating to T2s and Total Stations, it's been angles right from the backsight to the foresight (and foresight to the backsight to complete the horizon) ever sense.

Loyal

Bearings, angle left, angle right, deflections or azimuths does not matter. However it's described can be followed.

I never do anything "left".

(Oops, did I just make this a P & R thread?)

"When I started in the late 60s with the USFS, we were using transits, and deflection angles (left/right) were the norm. We also read the Compass fore/aft to catch left/right booboos though (it worked well)."

Same here, same time, same USFS, on the Quinault dist.

"Since graduating to T2s and Total Stations, it's been angles right from the backsight to the foresight (and foresight to the backsight to complete the horizon) ever sense."

Same here. First got my hands on a T-2 around 72 or so. Control for power line surveys.

OOPS

I think that should have been 'since' not "sense"

Oh well...

Loyal