Because I am old and dense. "Deeds on the ground" and plane above (aerial power lines) and below (subsuface pipelines).?ÿ
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State plain. ?????ÿ
SIDE NOTE?ÿ ?ÿ ?ÿI once worked for a company that was paid well to drag and measure with a 100-foot tape the distance along the ground where an underground communications line was going to be buried.
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Thier last two previous jobs were a spool short because they ordered cable by the PLANE dimension.?ÿ
@loyal?ÿ
Using "grid" as a synonym for State Plane is a newish phenomenon to me. I'm not sure that I ever heard it expressed that way until I saw it on this board. Also, thinking that GPS is the only way to survey in state plane......
@loyal?ÿ
Using "grid" as a synonym for State Plane is a newish phenomenon to me. I'm not sure that I ever heard it expressed that way until I saw it on this board. Also, thinking that GPS is the only way to survey in state plane......
Right on!
Every time I see someone using the term "the grid" (as if there is only ONE), I want to slap'em up side the head (not really, but sorta).
Many (at least some) of us started dealing with State Plane Coordinates decades before GPS came along. Some of the BEST (and some of the worst) surveys I've ever retraced were done with "conventional" equipment, and the same can be said for GPS Surveys as well.
Loyal?ÿ
@oldpacer Was that job out on the plain? ????
Move to a state that requires plats to have ground distances shown? Mind you, Montana more or less requires everything with a legal description to be platted.
I wonder if Spanish plain rain is slightly smaller than regular ground rain?
A well designed (and documented) LDP can come close, but it will never be "perfect."
Very true.?ÿ
HOWEVER, the Earth ain't flat!
It used to be......
There was a surveyor around here, who worked in SPC. In fact, he considered himself to be an expert with SPC. I never figured out why my dimensions were always about 1/2 a foot longer per mile than his.?ÿ
(Transit and tape days, and total station days)
I did not know til later on, what was going on.
N
@loyal?ÿ
I probably have to whisper this; with our T2's and distance meters we used to survey,,,,,,,,,,,,,geodetically. That's right for large traverses between NGS control we would survey geodetically without GPS,,,,,,,GASP!!!!
Without a computer, without a data collector (I did have a calculator)!!!!! The big book of 8 place tables was on the shelf next to the curta, but I didn't use em, I did know how, but the calculator was better.?ÿ
And you know what? It's all possible, you can still do it if you'd like too.?ÿ
I don't like to anymore, but it's a good exercise for a youngn.?ÿ
Imagine, calculating Lat, Longs forward then taking those and reducing them to state plane values!!!!!
That's not how its done is it?
Hmmmm, can't be done without GPS or can it?
Then about circa 1980-1981 or so I got a program to load in the HP calculator that did the geodetic calcs for me. Now that was a breakthrough.?ÿ
And so you know I wasn't working for some big company or government, just a lil shop over the local newspaper offices. Funny how much us old guys know.?ÿ
Apart from the problems of getting people to understand the difference between grids and ground, there's also the problem on general survey of too many figures in the coordinates. We normally truncate E and N to reduce the risk of the grid values being misread, or mistyped, but always have the FIRST note on the drawing explaining what we have done and giving the full values as well for the reference station marked on the drawing.
BUT there's always some architect/designeer who comes back and tells us the survey is wrong because the coordinates put it in the middle of the Atlantic Ocean - with a screenshot from Google to prove it!
@mightymoe I??ve followed 1960s/70s surveys that were tied to the classic triangulation network. I transformed the surveys to NAD83 then export a Lat/Long CSV from TBC, convert to GPX, import to my iPhone Topo Maps app then hike miles through heavy forest over hill and dale to within 20 feet of the monument I need, with my iPhone. It??s amazing.
@mightymoe Good luck finding a young guy of the RTK generation that even knows how to run a traverse with a total station, much less compute it out by hand. I was killing time in a waiting room talking to a kid asking him what kind of math skills they were teaching these days and he pulled out his iphone calculator. Asked if he could multiply without a calculator. Blank stare. 'Why would I want to learn that when I have this?'
Just because I'm paranoid, doesn't mean they aren't out to get me.