Point of Beginning

Traverse Adjustment

March 3, 2009

Posted By Alexander Thorp on 3/2/2009 at 2:05 PM

I've recently completed a closed traverse in snow covered hilly terrain in western MA, consisting of 26 segments with a traverse length of 7,547.35 feet. The unadjusted closure course is 0.377 feet, which calculated to a raw precision of 1:20,011.

The work was performed with a Sokkia SRX3 robot, leapfrogging around traverse, three tripods, doubling angles to foresight (direct and reversed), and checking backsights for distance.

I am presently contemplating two traverse adjustment methods, available on the "Traverse Adjust" routine on my data collector (TDS Nomad running Survey Pro Robotic v.4.6).

The two methods are 1) Angle Adjustment, and 2) Compass Rule Adjustment. I am aware of the possibility of performing a rigorous Least Squares Analysis on the traverse and some of the benefits of same, however, have set the LSA aside for the moment.

Now, I am working with another land surveyor on this project who claims that it is incorrect to perform a Compass Rule adjustment without first performing an Angle Adjustment on the traverse.

Indeed, TDS allows for adjustment based upon ONE OR BOTH of the methods.

I don't understand why it would be incorrect to simply apply the Compass Rule adjustment to the raw traverse results.

Any thoughts?

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