I have a client requesting number 15 which reads.......
15. _____ Rectified orthophotography, photogrammetric mapping, remote sensing, airborne/mobile laser scanning and other similar products, tools or technologies as the basis for the showing the location of certain features (excluding boundaries) where ground measurements are not otherwise necessary to locate those features to an appropriate and acceptable accuracy relative to a nearby boundary. The surveyor shall (a) discuss the ramifications of such methodologies (e.g., the potential precision and completeness of the data gathered thereby) with the insurer, lender, and client prior to the performance of the survey, and (b) place a note on the face of the survey explaining the source, date, precision, and other relevant qualifications of any such data.
This is the first time I have ever been asked to provide these services and It would be something I would have to sub it out and reference the company that provided the service on the ALTA, I haven't ever subbed any work out and don't really care for starting now but I may have to. Do you just overlay the deliverables from the aerial survey onto the ALTA?
Nevermind, after a quick email the client doesn't need it. How's that for a shocker.
well, in case you ever do...
used to do this on a fairly regular basis. main thing the client has to understand is the significant cost uptick. we had a guy (which is to say: he's still around, i just don't work at the old place anymore and haven't had a project on the scale to need his services) who did all our flights for us. he'd tell us where he wanted the panels, we'd run static, he'd fly it, we'd send him the NEZs, he'd send us back the photos and dwgs. we'd go out and random spot verify elevations and improvements. his stuff was always SPOT ON. so in that case, yes, we'd just drop his contours/flatwork into whatever our base file was. but it was never cheap. like never under 8 or 10K. once mapped half-foot contours across 600+ acres for us, i think that added like 45K to the survey cost.
all that said, it's been another good year. and if the accountant comes back at the end of december like he's done for the past couple years and says "you need to spend some money," i'm going to put serious thought into an RTK drone. the cost on those has basically halved since i first started looking at them, and if i can get anywhere in the ballpark of what that sub could do it'd pay for itself pretty quick. heck, the ATV i bought last december paid for itself in 2 jobs. a drone would take about 5 jobs.
[USER=8900]@Adam[/USER] I suggest you get in touch with a few aerial providers and discuss costs and time for delivery. You could save a ton of money and the timing can work... it depends. Of course your requirements need to be detailed.. think parking stripes and islands in a mall.
I have used both orthos and conventional aerial topo for ALTAs, not primarily for the precise work along the boundary but for the interior occupation...
"15. _____ Rectified orthophotography, photogrammetric mapping, remote sensing, airborne/mobile laser scanning and other similar products, tools or technologies as the basis for the showing the location of certain features..."
What this implies is that certain features can be located by less than survey standards if it is acceptable to the client. Explain to the client that for a typical survey in question all those features can be located to survey precision for the price you quote and that no value is added by including an additional expense for any contracted work. As the project size increases the extra expenses may in fact be a savings.
Paul in PA
