I bought a used SDR33 Expert 4MB. When I tried using it for Topographic survey, backsight residual report is always to the tune of more than 5 minutes. I am not comfortable with it. Did I miss something?
Thank you guys..
Regards.
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Replies
Arnel,
I reviewed the .sdr file and I see that your EDM distances are very good between points, however, I also noticed how far out of tolerance the Vertical Error is. Ā I noticed that you measured the height of your instrument above the point being occupied, but I don't see a rod height or a value for the height of your backsight tripod. Ā Are you measuring the height of your instrument above the point you are occupying and also measuring the height of the prism that you are using for a backsight, then entering this info into the SDR at each Turning Point?
Arnel,
I just left a reply to your post about the raw file.Ā I think I can help with interpretation.Ā As for the backsight being "off" by 5 minutes, we need to know if the problem lies within the collector, within the instrument being used, within what may be a compatability issue, what may be a matter of changing a few settings on one or the other, or whether it is just a simple procedural issue.Ā More info please.Ā I'm here to help.
-Scott D. Warner, R.L.S.