I don't know if this is common anywhere, but it's the first time that I've come across this.
".....200' to a pipe, deflecting thence from said line 93-36 to the right, a distance of 412.2' to a stake, deflecting thence 86-46 to the right a distance of 264.8'...."
When I first ran the deed in it didn't close.?ÿ Then I ran it in going the opposite direction, and still not good.?ÿ Then I used the angles as the exterior angle, but ran it's interior angle that distance, and the lot closed just over a tenth.
Weird, since instead they could've just said, "turning left an angle of 86-24....."
This is a new one for me as well. I'm interested to see if others have seen this.
T. Nelson - SAM
It could be a deflection from the foresight; or not a deflection at all, but an angle. See if the angles add up or if the commentary angles add up.
They're definitely angles.?ÿ But as said, they're using some sort of odd deflection method, like they can only describe angles right, but they're running the lot clockwise, so they should be stating the left angle.?ÿ
Instead of listing the interior angle, they're calling out the supplementary angle, and calling it a deflection.
The lot closes that way, and makes sense with the monuments and abutters.
As said, it's a new one on me
I think oldpacer is on it. I caught the tail end of civilian use of deflections as a standard for field notes. It was an easy thing for me as fire direction was done in azimuths and deflections.?ÿ
Now I'm confused. The next line should run at the stated angle relative to a line continuing from the prior line either to the left or right.?ÿ So, instead of continuing in the same direction you deflect from that direction by the angle stated.
Yes, it's like, here's the angle right, now turn a complete 180 and go this distance.?ÿ Very weird
They were just reading straight from a transit or total station. No need to establish a basis of bearings.?ÿ
If you pick up surveying books from the black transit days it's very common.
Deflections are what the name implies; a deviation from the direction you are currently traveling. If you are heading east and deflect 45 left, you will be heading northeast. If you are heading east and deflect 45 right, you will be heading southeast. Pretty simple stuff...
Any time we used deflection angles it was in relation to the foresight (left or right) Also made it easy to compute offsets to the line you were running.
@jph: They are correct.?ÿ The deflection angle is exactly the supplement of the interior angle.
The sum of the deflection angles in a traverse should add up to 360?ø (with clockwise angles positive and counterclockwise angles negative).
If they are using a T-2 or T-1 or similar instrument it would only read to the right (you can still turn it anyway you like but the reading will be clockwise)
One advantage of deflection angles is when the traverse lines are to be connected by curves, the deflection angle is equal to the delta, or central angle, of the curve.?ÿ That solves some of the problems where surveyors make the most mistakes: adding and subtracting.
I went to school with the son of a paving contractor. He was all about using a T-16. Apparently it was a very useful instrument for turning deflection angles right or left that were common in NCDOT plan sets back in the 1980??s. -tying this thread back to the ??40 years ago? thread.?ÿ
@dave-drahn
Yes, that's a deflection angle.?ÿ But that's not what's going on here.?ÿ They're stating the angle right, which is the correct bearing in the opposite direction.
You are right, no deflection angles in the description, but there are also no bearings. Using angle rights or deflection angles were a way to make the surveyors job easier. No need to establish and carry through a basis of bearing.
Surveying was approached by many as a kind of sub-engineer. The more dumbed down the better. Unfortunately some new surveyors still have that attitude.
"bassackwards" is their modus operandi.?ÿ The exact opposite of the way the majority would describe things.