Sec 12 B 56 T 2.
I happened to be talking to Bill O'Hara when I received the email. We discussed my construction of the section and he took no issue. I recovered two original section corners that fit surprisingly well as well as having tied in K0, Clark 26, Gulf Corner and various McCombs corners. This is definitely an education problem. I'm going to do my best to politely school a bureaucrat tomorrow.
Yeah, no. What Kent said. This has nothing to do with transformation. It's felony abuse of GIS.
Well, at least you have plenty of time and budget for this kind of thing.....
> This is probably for reporting to the Texas Railroad Commission. Nobody in his right mind would want to assume liability of fudging a well location like that.
I don't see it as fudging a location. I see it simply as using the datum specified by my client. If you want a note specifying the NAD83/91(2011) coordinates on some points, that would be very useful. But, it isn't like God Himself decreed the coordinates for NAD83. They are arbitrary (but consistent).
My example is a few cities around my area that require surveys to be tied to NAD83/91(XXXX). The catch is that they require ties to their monuments, with their published values. Due to many factors, not the least of which is their own internal adjustments, none of those monuments are actually the datum specified. (There is an issue of no date specified, as well. And since the velocities here in WA are signifigant, there is on going drift, with no real way to adjust for it, or note it.) So, it pains me to call the datum out as NAD83, so I call it out as that city's realization, and note the basis of the coordinates.
The example of the OP is sillier in scope, but identical in practice. As long as you specify the datum, who cares what the coordinates are?
Kent likes the elegance of setting up on his old aluminum caps and getting the same coordinates 10 years later. It is elegant, and useful, and awesome. But if the client wants a transformation, I just don't see the problem.
If they wanted the corner to be at 10000,10000 and all the other coordinates called out relative to that, would you do it? I am curious about that. If there is some regulation or standard that specifies the datum of a survey, that would keep you from that. Is that an issue here?
The datum is the same. Their belief of where the boundary lies and even the shape of the boundary is different than my survey. Their GIS says there is 640 acres in the section and my survey shows 642. Should I also change the size and shape of my work to match their GIS? I don't think so. The facts are what they are and they will not change to suit a faulty GIS model.
You could create a KMZ file of your survey and ask them why your coordinates are not off by 200 feet. Not even GIS can argue with Google. That was exactly how I recently straighten out a local County.
I emailed the GIS Department, told them the problem and asked for their surveyor to contact me so we could resolve the conflict.
I also pulled the adjoiner's approved plat. That surveyor's boundary was within a few feet of my construction, so I take that as further evidence my boundary is in the right place and the GIS is in excess of 200 feet off. (A few feet of difference may sound excessive to you but remember the controlling monuments are minimal and miles apart for an area of about 192 square miles. I have no information about how he reconstructed the blocks).
The GIS Manager called me. He expressed surprise that their technician did not contact his department when the conflict arose. He was very understanding and knew that the database does get adjusted from time to time. He told me to have my client have the guy contact him directly. Hopefully they can have a come to Jesus meeting and get this problem resolve. I'm hoping that puts an end to this.
AN
:good:
Hey Andy, get em to put the aerial behind the RRC GIS, if there are wells in the vicinity, you can show em how far off they are. Just thot of that while working on RRC GIS.
>I'm hoping that puts an end to this.
Nothing personal, but I'm hoping they drag it out for a while. It's entertaining!
😀
Sadist.
😛 B-)
