Angle Tolerances

What software package is that? I'd wager the manual can tell you what those are supposed to mean.

Posted by: @field-dog

Also, should the expected mean of a vertical angle be 5" or better for a 5" instrument?

As a general rule, I double the nominal DIN/ISO spec for vertical angles. Doing that makes my network adjustment reference factor for VA much more in line with expectations.

The manufacturers may claim otherwise, but I've always found the vertical to be looser based on real world results.

In any case, that screen appears to be not for inputting standard errors, but for mean angle tolerances for the input observations.

Hz (r+l) = Hz angle Right + Hz angle Left

5" setting maybe too low for your 5" instrument.?ÿ

@rover83?ÿ

The software package is Topcon MAGNET Field. I can't find anything in the version 3.0 manual that pertains to the meaning of Hz (r+l) and Hz (r-l). As Lee points out, Hz (r+l) = Hz angle Right + Hz angle Left. Topcon, no doubt, assumes a user knows the meaning of this. I don't remember seeing Hz (r+l) and Hz (r-l) displayed in any results fields, so I'm trying to figure out the relevance of these to the user or to the program (set collection). If I turn a 90?ø (D) angle, then 270?ø (R), my Hz (r+l) should be 360?ø. If my Hz tolerance is 5", why do I need to know the Hz (r+l)??ÿ If Hz (r-l) = Hz angle Right - Hz angle Left, then 90?ø - 270?ø = - 180?ø. What does that tell me?

?ÿ

Posted by: @leegreen

5" setting maybe too low for your 5" instrument

I think the VA tolerance on our collector is set to 5". Maybe 10" might be more reasonable? Unless we're traversing with target heights, I don't worry about a slight deviation from a desired tolerance in vertical angles, such as locating property corners.

On my Magnet software I use the pre-defined TS (class 1) for rounds of angles and it leaves those boxes blank, but I believe the Hz (r+l) is your tolerance of your angles in the direct face added to the angle in the reverse face compared to 360?ø, and Hz (r-l) is the opposite.

For our 2" instrument we set the Hz tolerance?ÿ to 5" and the vertical to 10"

Posted by: @jmorgan

For our 2" instrument we set the Hz tolerance?ÿ to 5" and the vertical to 10"

Good idea! In my opinion, the use of Hz (r+l) and Hz (r-l) are just legacy items, like including ?? latitude and ?? departure in the output of a point-to-point inverse calculation.?ÿ