OK, you are out retracing a survey, that previously was conducted via RTK GPS.
You have tied into 6 previous monuments, and are using RTK GPS. You are into the previous system, within a tenth, or 0.15'.
Suddenly, the next point you tie is 5.49' off.
What do you do?
Well, you reinitialize your RTK, and see if it is YOUR error. No. Then, you go do something else, and come back, at a later time, and see if the answer is the same.
Then what do you do?
Then, you find it is off also by 5.5' again.
OK, so we found on that is off.
Then, you find the next one is off, same direction, and amount, (+ - 0.12')
Then, same on the next one.
What happened?
What are the possibilities?
Nate
ROTFLMAO waiting for Kent to find this story.
It's called SNAFU.
Eventually you will discover all of the shots are correct but the description is faulty.
> What happened?
>
> What are the possibilities?
Dueling FUGARWE base positions on different days.
Option 1- The original layout was done in Magnet...
Option 2- A new here position every day.
Option 3- US versus International Feet...
...and the list goes on. The one common thread to all cases is that someone failed to perform sufficient checks.
1) Transposed numbers 2641.7-2647.1= 5.4 and then carried forward. Been there done that. Pretty sure after all these years I am somewhat dyslexic. Bad deal for anyone dealing with numbers. I KNOW I staked two abutments a quarter meter to far apart 20yrs ago because of this. Yuk. The vast majority of my mistakes are directly entered in to my data collector.
2) FUGARWE Base has bit me before, but I think I always caught it prior to construction or recording. Please Lord let this be true.
Steve
What to do?
It depends. I would first check to be confident my numbers were correct.
If this was truly a "retracement", I sure wouldn't have the knee-jerk reaction to try to "correct" the mistake of the creating surveyor, especially if reliance over time was in play. Find the evidence and follow the law.
I've seen the same thing before, The RTK was set up, locations were taken day one, Base was collecting static and sent to OPUS, the new value for the base point was entered. Day two with the new value for the base point new survey was done 5.5' from day one survey, a classic case. The coordinates for day one locations were never updated.
1. Check your work.
2. More records research & discussions with owner and adjoiners.
3. Phone call to previous surveyor.
4. Depends on outcome of 1, 2 and 3 above.
Do not talk to ownerRetracement Surveying
Do not talk to owner until you know what is really happening.
An important question is: by "off", do you mean a monument, set by a licensed surveyor, with a legally accompanying plat? And the numbers on the plat is "off", and you can prove that the field crew made an imprecise measurement? In that case, to accurately retrace the established property lines would be to hold the monument, the numbers yield.
I think two different localizations, two different days.
Somebody didn't know what they were doing is my guess.
Probably took a base shot two different days, maybe two different locations, maybe the same place.
U da man, U'll figger it out.
:good:
Norman, that's my first guess. (we are in the same page)
Maybe a cow moved the base!
Or a horse got it....
Yeah, deed staking IS NOT retracement.
You are right
Numbers don't match plak.
We are going to see more of this sort of thing.
Retracement, and then find ONE monument off from the rest. (Bad init)
N
You are right
So what if it was a original marker placed on the interior of new subdivision? You can't prove it was a bad init, but sure looks like one. Gonna hold it or fold it? What if the lot owners have relied upon it? It's an original monument that doesn't match the plat. Can you kick it because the numbers aren't quite right? How far off before it's bad for sure? I think you need to investigate a bit further than whether by measurement it's "off." An established boundary isn't "off," it's perfectly "on" regardless of the number blinking on the screen.
Is it possible...
That the pin you found is an offset to the corner? At 5.5' I'd at least think about it?
You are right
> Gonna hold it or fold it? What if the lot owners have relied upon it? It's an original monument that doesn't match the plat. Can you kick it because the numbers aren't quite right? How far off before it's bad for sure? I think you need to investigate a bit further than whether by measurement it's "off." An established boundary isn't "off," it's perfectly "on" regardless of the number blinking on the screen.
Well said...
Nate,
Take a look at Harris v. Robertson, 813 SW 2d 252 - Ark: Supreme Court 1991 and see what the Arkansas Supreme Court said about 'pins' holding over measurement.
DDSM;-)