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Yet another SurvCE epiphany…but what does it mean?
This image shows two sets of points. On the left is from the control file used in SurvCE for my growing control network. On the right, are what I believed to be the same points, but they come from an ASC file out of SurvCE…They were apparently from the set of “JOB” points, not the “CONTROL” set of points.
At first I thought: “This is easy…Just divide one set of points by the Combined Factor, and that will produce the other set. But it’s not so. They’re “off” by something other (and bigger) than that. To make matters worse, I’ve noticed a subset of the points that are not only displaced from where they “should be”, when I look at the COGO map screen in SurvCE, but rotated somewhat too.I’m going to create a new CAD file, and plot all of these in the same drawing, but realized that it must be, when you have redundant observations in a SurvCE file, and you pick points to either back sight or fore sight to, that it matters whether you choose the point from the control file vs. the job file. FYI, when I made additional observations to some of the points, I never got those screens that warned: “the distance measured was XXX, the distance computed was YYY, a difference of ZZZ”.
Anybody know what might be going on here? I’d be happy to figure out why the points aren’t just off by small amounts (like centering errors etc.). Some kind of blunder going on here.
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