If I find several CCRs for the same corner, which one should I use? The most recent one? I compared coordinates on 2 CCRs the other day. They differed by something like 0.4' x 0.3'. Would I use the provided scale factor, etc. to bring their values closer together for comparison?
If you are at the stage of the project where you are looking for evidence, you need to search all probable locations.
If the records give coordinates in different forms (i.e. ground vs grid or different datum realizations) you need to convert them to the same form in order to compare.?ÿ Does one say coordinates are SPC and the other say they have scaled to ground?
When there are multiple monuments or interpretations for a corner, the professional land surveyor you are working for must make the decision of which to use, not the field crew.
Coordinates are not static, they shift, it could well be that both are correct. The important fact is where on the ground the monument is located.
I'm assuming that the CCR's are describing one monument.
If you are trying to locate a boundary corner on the ground, I would not use either. Think about where coordinates fall on the rules of construction.
If you are showing it on a drawing of some sort, I would be very careful how to label it.
What's a ccr?
Corner Control Record
Certified Corner Record
I assume above coordinates are SPC because of zone, convergence, and scale factor. The zone indicates 0901, which I had to Google. I never heard of a FIPS zone.
These coordinates show no convergence and scale factor, but indicate an east zone.
Yes. I'm trying to calculate SPC coordinates for plat corners by using the subdivision legal description. Then I can break out the RTK rover and attempt to find corners I can't find using fence lines or taping.
What do you mean by "rules of construction"?
The term "hierarchy of calls" is more familiar to me. Monuments hold over measurements, distances over angles and bearings. Senior rights over monuments. Coordinates fall at the bottom of such a list.
So somebody found a RR spike in 2013. By 2016 the RR spike was no longer apparent and somebody had set an "N&D", whatever that may be, which was found and accepted as a section corner.?ÿ One suspects that the RR spike may be lurking under an inch or 2 of asphalt overlay. Even if not it's position may have been recovered from the 2013 references. It's not a good look for Mr. 2016.?ÿ?ÿ
Thanks!
I'm not sure of what to do with CCRs like the 2013 one. There is a RR spike. Its obviously not the original corner. So why this position and not 6 feet away? We need more than, because I said so. The only use this CCR has is to reestablish whatever lines Mr. 2013 was establishing when he filed this. I suppose that is better than nothing... There are some good CCRs out there, but most are like this.?ÿ
Need to sidetrack for a moment. The sole purpose of reference ties is to find whatever they're referencing, not reset it. True or false? Sadly, I don't think a lot of surveyors would risk working out in a large street intersection with a hammer and chisel to recover a survey point.
