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How do you describe a curve?

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(@rberry5886)
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"What do use to measure with, your chord is longer than the arc length."

Jud, are you talking to me, are you talking to me....
my chord is shorter than my length....:-)

 
Posted : 18/05/2012 4:18 pm
(@norman-oklahoma)
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How do you describe a line?

It appears that 2, maybe 3 of you (of 15) use "a distance of" in your line calls.

 
Posted : 18/05/2012 4:26 pm
(@mark-r)
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How do you describe a line?

Simpler the better. I use the arc length, delta, and bearing in and out of tangent lines. Why make it any more complicated.

 
Posted : 18/05/2012 5:29 pm
(@dave-karoly)
Posts: 12001
 

How do you describe a line?

normally I don't favor using "a distance of" except with calls, for example, "thence North 89°45'45" East along the line between Sections 22 and 27 a distance of 454.45 feet; thence..."

 
Posted : 18/05/2012 5:50 pm
(@mark-r)
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How do you describe a line?

Most important rule of descriptions is calls. Section lines, ROW, Etc. I agree Dave. I thought we were just describing a curve without calls though.

 
Posted : 18/05/2012 5:56 pm
(@ianw58-2)
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In a word, no.

And the state of descriptions up and down the state proves it. 😉

 
Posted : 18/05/2012 5:57 pm
(@ianw58-2)
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Same here, Dave. It makes a nice check on my fingering.

 
Posted : 18/05/2012 6:02 pm
(@dave-karoly)
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How do you describe a line?

an east-west section line is on a curve HAR HAR HAR!

 
Posted : 18/05/2012 6:05 pm
(@half-bubble)
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Woohoo! The boss just taught me this trick today! He said he was the only guy he knew who did it that way ...

 
Posted : 18/05/2012 6:08 pm
(@ianw58-2)
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Thence North 56d13'49" East xx.xx feet to the beginning of a curve to the right having a radius of 160.00 feet;

Thence northeasterly a distance of 92.97 feet along said curve, through a central angle of 33d17'28";

Thence North 89d17'28" East yy.yy feet...

Similar to many.

(I hate to use d or D instead of the symbol, but I can't seem to find it on my iPad...Sorry!)

 
Posted : 18/05/2012 6:08 pm
(@ianw58-2)
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Who's yer boss? Where'd he learn to do good stuff like that?

 
Posted : 18/05/2012 6:10 pm
(@ianw58-2)
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I'd prefer that they held the tangent in, the tangent out and the radius. That way, the street centerline would be in the same place and not moving around in the curves. Surveyors a a lot better at laying out straight lines than they are at laying ur curves.

 
Posted : 18/05/2012 6:15 pm
(@ianw58-2)
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I ask to see the ordinance. In California, there usually isn't one. Then, it's a ce of style. My signature. My style. End of story.

 
Posted : 18/05/2012 6:17 pm
(@ianw58-2)
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I used to use concavity, too. More people understand left and right...wel at least the concept, perhaps not the actual direction. 😉

I also used to do mine in all caps, too. Then I got super-annuated. All caps are hard to read.

Our styles are very similar, Jered!

 
Posted : 18/05/2012 6:19 pm
(@dave-karoly)
Posts: 12001
 

Yes, PLEASE don't use all caps.

I never favored using the concave call. Right or left is much more intuitive.

 
Posted : 18/05/2012 6:39 pm
(@ianw58-2)
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Yeah, well, concavity is for young guys and you've always been older than me.

 
Posted : 18/05/2012 6:52 pm
(@norman-oklahoma)
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> Woohoo! The boss just taught me this trick today! He said he was the only guy he knew who did it that way ...

I began my survey career in British Columbia. There, curves on plats are annotated with azimuths from the PC and PT to the center point, the radius, and the curve length. With that data, calc'ing through the radius point is a natural.

BTW, they don't use metes and bounds legal descriptions there very often. Every parcel is created by a map, and property descriptions are nearly universally by lot number on a map.

 
Posted : 18/05/2012 7:28 pm
(@true-corner)
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> > Woohoo! The boss just taught me this trick today! He said he was the only guy he knew who did it that way ...
>
> I began my survey career in British Columbia. There, curves on plats are annotated with azimuths from the PC and PT to the center point, the radius, and the curve length. With that data, calc'ing through the radius point is a natural.
>
> BTW, they don't use metes and bounds legal descriptions there very often. Every parcel is created by a map, and property descriptions are nearly universally by lot number on a map.

Firstly, we're not Canadian (thank God for diversity). But the best description would list chord, chord bearing and radius or some other element. KISS, keep it simple...

 
Posted : 18/05/2012 7:37 pm
(@norman-oklahoma)
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How do you describe a line?

A surveyor who favoured using "a distance of" told me, recently, that he used it to separate the bearing and distance to avoid confusion with old bad copies of bad copies. I pointed out that the legals he writes today are likely to be kept in the records as pdf's, and a copy printed out a hundred years from now will be as pristine as the day it was scanned.

 
Posted : 18/05/2012 7:38 pm
(@mike-berry)
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> THENCE NORTH 56°13'49" EAST ###.## FEET TO THE BEGINNING OF A 160.00 FOOT RADIUS CURVE CONCAVE SOUTHEASTERLY; THENCE NORTHEASTERLY ALONG THE ARC OF SAID CURVE 92.97 FEET, THROUGH A CENTRAL ANGLE OF 33°17'28", (THE CHORD OF WHICH BEARS N 72°52'33"E 91.66 FEET); THENCE N 89°31'17" E ###.00 FEET
>
> I like concavity over left and right and I also use all caps.

I don't like concavity, or convexity for that matter (this curve is convex northwesterly), but I do appreciate that it eliminates one blunder.

When you write another description that includes this curve, except from the opposite direction, the curve is still CONCAVE SOUTHEASTERLY, whereas I have to make sure I turn my "curve right" into a "curve left"

 
Posted : 18/05/2012 7:42 pm
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