Hi Guys,?ÿ
I've adjusted a traverse I did last week using the Bowditch method and got a closure of 1 in 55,000 which meets the requirements for the client we are working for.?ÿ
What I need advice on is, can I then put this through a Least Squares adjustment on Starnet? Or will the fact i put it through Bowditch first harm the results? My last company always put it through Bowditch first then Starnet and the accuracies seemed to be great.
?ÿ
Thanks
Peter
You can, just be sure you use measured not adjusted numbers. I wouldn't layer an adjustment over an adjustment. It's similar to a client I had some time ago that would keep calibrating a field file each day. What a mess that was.?ÿ
LSA only uses positions for a priori coordinates, so from a coordinate standpoint it doesn't matter whether you input the adjusted coordinates or the unadjusted coordinates from the Bowditch adjustment. The network (and coordinates) will be iterated until the solution converges.
The exception, of course, is the points that you want to hold fixed in the adjustment - those need to be correct i.e., what you want everything to flow from and be adjusted to.
What is critical is that you input the raw observations, not the adjusted observations.
Measurement raw data is measurement raw data. You can adjust in one way. Then do it another way. And another. Etc. Etc.?ÿ
But you wouldn't take the adjusted data from the first method and readjust the adjusted data by another.?ÿ ?ÿThat would be wrong.
I've adjusted a traverse I did last week using the Bowditch method and got a closure of 1 in 55,000 ....
BTW - closures are calculated before the adjustment. Of course you get great closures on adjusted data - It's adjusted!?ÿ
