That's odd, I called up the state plane map and it showed two zones. Then after your post I can't seem to find that map, all of them show the one zone...

They might be quite close if there is a switchback curve between them, any turn in the highway will shorten the mark to mark distance.  

@mathteacher Stations follow the road centerline, it gets more complicated with divided highways. But assuming it's a two lane highway it will ge...

@mathteacher The statement leaves out too much. It would be better to reduce it to one clear sentence: "Coordinates, bearings and distances sho...

@mathteacher It won't download for me. I will also add that there are some local projects that were Grid, not many that I've run into, both coordin...

I've never heard of that, SP coordinates and ground distances published for a DOT project, that would be a painful experience of pointless calculation...

@mathteacher Yep, you're exactly correct, however that means that each distance needs to be recalculated, by globally multiplying the coordinates t...

I concur with both Norman and Peter. I see a couple of issues with the commencing point tie, it's stated that "the coordinates of said point are refer...

@mathteacher You really, really want surveys to be in state plane. I don't know of any engineering or surveying company wanting to survey deep in t...

@mathteacher No error? Map projections are inherently full of error, that's why Antarctica looks so huge on most world projections. It's the same ...

@mathteacher Mostly because SP was developed for huge mapping projects, not construction, are you arguing that .8' in 1000' is somehow an acceptabl...

There was a spate of those fees during some O&G exploration. The most annoying one was an attorney that lived 20 miles NW of a town. His place was...

@mathteacher For the airport the error is 483PPM. This means an error in distances of .48' in 1000 feet. Another way to visualize it would be the s...

@boffc130 Trimble offers a line staking program, set the two endpoints assign one as 0+00 then station stake along that line. It takes 10 seconds t...

@mathteacher There was a push to make boundary lat, long based, more like the GLO. It was mid to late 1990's and I used that program, but, like m...

@murphy I would do the same if I lived where state plane was "close". I almost never give out coordinates, except for DOT and some rare construct...

Basically it comes down to what is the error budget for the project. We generally see 200-400PPM using a state coordinate system. That is probably muc...

$500 for a used one compared to hours of searching, seems like a no-brainer. Last time I checked a new one is around $1300. We've had little use fo...

I got that tee shirt a few times. One reason to stop using paint for anything. There are many more reasons.