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Now I know why I can't duplicate...

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ropestretcher
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Following a survey by others and things just don't fit. I just read the cert on what is titled a "Boundary Exhibit."

....All distances are in feet and decimal parts of a foot and are correct at a temperature of 68 degrees farenheight....

It was 92 degrees the day we did field work.
[sarcasm]
What is the coefficient of expansion of a platted dimension when it's not 68 degrees farenheight ?[/sarcasm]

I wish some would spend more time on the quality of the survey and helpful information on the plat, rather than dumb certs.

OK, rant off. :-/


 
Posted : August 14, 2013 9:31 am
Tom Adams
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I wonder what the distance would be if they were at 68 degree latitude? We need all the conversion factors....


 
Posted : August 14, 2013 11:52 am
holy-cow
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Yes. What is the appropriate combined expansion factor for an aluminum cap on a steel bar so that we can determine just how far the dimple will move from its original location on the cap?


 
Posted : August 14, 2013 12:26 pm
Kent McMillan
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> ....All distances are in feet and decimal parts of a foot and are correct at a temperature of 68 degrees farenheight....

That's a classic. It's definitely in the same category as: "Bearings refer to GPS North as determined on [date]".


 
Posted : August 14, 2013 12:56 pm
ropestretcher
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Are the GPS signals cooling down my receiver since they originate in space or do they heat up on re entry?


 
Posted : August 14, 2013 1:13 pm

ropestretcher
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Everyone knows, north is always up.


 
Posted : August 14, 2013 1:18 pm
nate-the-surveyor
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When you don't know what you are doing, place useless metadata on the plat.
Then, if anybody challenges your work, then you can demand to see their notes, and see if they properly take temperature readings, on THEIR work, like you did. IF they did not, then THEY did not follow proper procedure. Attorney Fodder.

Maybe it would be more useful if they also put the distance to the closest coffee shop, at the time of the survey. So, at least the distance to the BIG BAD BOSS would be known!

Funny stuff.

Kind of like putting International or USA feet on a 50' x 100' Lot survey.

N


 
Posted : August 14, 2013 1:29 pm
nate-the-surveyor
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A suggested note for your plat

Government studies show that 3 out of 4 people, make up 75% of the population.

Hope this helps.

Nate


 
Posted : August 14, 2013 1:40 pm
charles-l-dowdell
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> Yes. What is the appropriate combined expansion factor for an aluminum cap on a steel bar so that we can determine just how far the dimple will move from its original location on the cap?

Epoxy a golf ball onto the aluminum cap, then you can pick the dimple that fits the best.:-D


 
Posted : August 14, 2013 2:35 pm
Target Locked
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Imagine if you would have done the survey in the middle of winter. What a mess;-)


 
Posted : August 14, 2013 3:20 pm

Tom Adams
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I took a practice exam for the SIT before I got my license back in around 1987. One of the questions was them giving the true bearing on a line that was measured back in 1947 and they gave all of the magnetic declination information for back then and then provided all of the magnetic declination information for today, and the question was what was the true bearing of the line today. I figured it was the same as the true bearing back in 1947.....


 
Posted : August 14, 2013 3:29 pm
jeffE
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>
> Maybe it would be more useful if they also put the distance to the closest coffee shop, at the time of the survey. So, at least the distance to the BIG BAD BOSS would be known!
>

Don't you want a bearing with that distance so you will have time for a donut with that coffee?


 
Posted : August 14, 2013 3:42 pm
nate-the-surveyor
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Yeah, really it needs a bearing. But, then we'd need a basis of bearing, that was sort of reproducible. And then the bearing would be a bear.

Maybe a brg and dist, and the NAME and ADDRESS of the coffee shop. So it'd be a MEETS and BOUNDS call to the Coffee shop!!

N


 
Posted : August 14, 2013 4:05 pm
bill93
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Useless metadata

> When you don't know what you are doing, place useless metadata on the plat.

A fine example in the lower left corner of the map in this brochure.
http://www.co.marion.ia.us/maps/historical/LostTownsOfLakeRedRock_Brochure.pdf

And after they give 6-place decimals (i.e., 3 or 4 inch resolution) on the coordinates of (some point in) former towns, one of the points I have taken some trouble to remeasure multiple times (the supposedly historic sycamore tree) is 55 feet from my values and the county GIS values (which are within 3 feet of each other). If any other point can be precisely defined, I'll bet its values are just as bad.


 
Posted : August 14, 2013 5:50 pm
Perry Williams
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A suggested note for your plat

> Government studies show that 3 out of 4 people, make up 75% of the population.
>
>
> Hope this helps.
>
> Nate

And

53% of statistics are ... just made up.


 
Posted : August 14, 2013 9:58 pm