I'm trying to set up a Trimble S6 via a 3 point resection and when I get to the 3rd point I get an audio warning about it being out of tolerance. Is there any way to change the tolerance so I don't get this message?
somental, post: 369442, member: 11631 wrote: I'm trying to set up a Trimble S6 via a 3 point resection and when I get to the 3rd point I get an audio warning about it being out of tolerance. Is there any way to change the tolerance so I don't get this message?
go back out to settings and I think you will find it in "survey styles"
How far out of tolerance is it? It might mean you have a problem with the points you are using, maybe one is incorrect name?
somental, post: 369442, member: 11631 wrote: I'm trying to set up a Trimble S6 via a 3 point resection and when I get to the 3rd point I get an audio warning about it being out of tolerance. Is there any way to change the tolerance so I don't get this message?
Been a while since I used Trimble, but, do you already have a point number in the file with the same point number you are trying to use as the '3rd' or 'new' point? I seem to remember getting this message when using 'station elevation' in a TSC2, and I just continued until I had the option to overwrite the existing point number with the new elevation. I don't think it is a tolerance settings, but post the answer once you've figured it out, I'd like to know.
The default tolerances are zero, you have to set them if you don't want to see the errors. I leave them on zero, that way every shot (or set) I take I see how well it fit.
A couple more points on the resection routine -
- To change the Duplicate Point Tolerance from zero you go to the Survey Style in Settings
- If you exceed your tolerance but want to keep the measurement and continue select Store Another. If you want to discard it and re-measure select Discard.
- You can go to Options at the bottom of the screen and set face order, observation order, etc.
Lee D, post: 369529, member: 7971 wrote: A couple more points on the resection routine -
- To change the Duplicate Point Tolerance from zero you go to the Survey Style in Settings
- If you exceed your tolerance but want to keep the measurement and continue select Store Another. If you want to discard it and re-measure select Discard.
- You can go to Options at the bottom of the screen and set face order, observation order, etc.
Also when you observe the first two points the routine has already made a "best guess" computation of the resesction results. If the first two points had poor strength of figure in relation to your third point you'll see a lot of error. Once the third point is added the resection is re-computed and new error estimates provided.
When it comes to resections the more points and observations the better!
my two cents
Related question to doing a resection in Access.
Does it make any difference whatsoever what projection you're working in when doing a resection? Reason I ask is I've pulled my hair out trying to do resections in Access while working with State Plane coordiantes, and I still don't know why I had such a difficult time. Worked fine while working in a local system, no projection, no datum and I would have assumed that it wouldn't make any difference as to what type of a projection I was working in, but being relatively new to Access I felt it was fair to assume I might have been overlooking something.
Thanks.
It shouldn't matter what coordinate system you're in, Access calculates all the scale factors, etc. If you can get good results resecting from ground coordinates on a local grid and can't get good results on the same points using State Plane, that needs to get forwarded to Trimble.
Plumb Bill, post: 369601, member: 226 wrote: Also when you observe the first two points the routine has already made a "best guess" computation of the resesction results. If the first two points had poor strength of figure in relation to your third point you'll see a lot of error. Once the third point is added the resection is re-computed and new error estimates provided.
does it re-calculate though? I know the displayed residuals will update but I have found that if the first two points do not give a good orientation (eg both close to the instrument) then the auto pointing will be off for the rest of the resection.
Good question. The way I would test that would be to set up a four point resection and purposefully bust the second observation - just turn off Autolock and move the instrument slightly off the prism. Then go through a couple sets direct and reverse and see if the pointing improves over the course.
