AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

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Distinguished Contributor
wbrustle
Posts: 170
Registered: ‎11-12-2007
Message 1 of 8 (411 Views)
Accepted Solution

contours around curves

411 Views, 7 Replies
06-21-2013 07:12 AM

I was wondering if anyone knows of a way to evenly space contours around a curve in a surface.

Many times I have a steep area in a surface that needs to be displayed using 1 foot contour intervals, and in certain areas the contours are crossing each other around curved areas, like a curve in a ditch. Is there a way or a setting I am missing that may help to alleviate this problem. In the past i have had to "fudge" the surface a little to get the contours to look correct.

*Expert Elite*
neilyj
Posts: 3,756
Registered: ‎08-01-2008
Message 2 of 8 (409 Views)

Re: contours around curves

06-21-2013 07:16 AM in reply to: wbrustle
Do you have any sort of smoothing applied to these contours?
neilyj
(No connection with Autodesk other than using the products in the real world)


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Distinguished Contributor
wbrustle
Posts: 170
Registered: ‎11-12-2007
Message 3 of 8 (406 Views)

Re: contours around curves

06-21-2013 07:19 AM in reply to: neilyj

yes, I have it set to the maximum it can be

*Expert Elite*
BrianHailey
Posts: 2,791
Registered: ‎04-27-2005
Message 4 of 8 (401 Views)

Re: contours around curves

06-21-2013 07:28 AM in reply to: wbrustle

Contours should never cross each other in a TIN surface. If you smooth the contours, you are sacrificing the accuracy of the contours so they "look pretty". Instead of smoothing the contours, try smoothing the surface.

 

I wrote about it on my blog HERE.

Brian Hailey
CAD-1.com
My Blog
Distinguished Contributor
wbrustle
Posts: 170
Registered: ‎11-12-2007
Message 5 of 8 (392 Views)

Re: contours around curves

06-21-2013 07:47 AM in reply to: BrianHailey

thank you so much. Our company moved from LDD 2008 right to Civil 3d 2013 with no training....is smoothing a surface new or was it always available? I didn't even know there was a command for that. I had always just smoothed contours. I can't wait to try this!!!! These discussion groups have been a tremendous help. I usually get a reply to a posted question within minutes and most of my questions are answered so thanks again to all the experts.....we all know how frustrating it is when something does not work the way its suppose to :smileyhappy:

Distinguished Contributor
wbrustle
Posts: 170
Registered: ‎11-12-2007
Message 6 of 8 (388 Views)

Re: contours around curves

06-21-2013 07:53 AM in reply to: wbrustle

one more question about smoothing suface...............what point interpolation/exreapolation output location is recommended?

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Neilw
Posts: 2,253
Registered: ‎09-04-2006
Message 7 of 8 (355 Views)

Re: contours around curves

06-21-2013 09:58 AM in reply to: wbrustle

I usually go by trial and error. Try a setting and see if it gives satisfactory results. Assign an area that encompases the problem and apply. You DON'T want to smooth the whole site as smoothing adds processing time.

 

If you are only concerned about the pretty picture and don't need a precise surface in that area, try bumping down your contour smoothing to half. Using full contour smoothing almost always results in crossing contours.

Neil Wilson (a.k.a. neilw)
Infrastructure Suite/C3D 2013, LDT 2004, Power Civil v8i SS1
WIN 7 64 PRO
HP Pavillion h8xt, i7 2600, 12 GB
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http://www.sec-landmgt.com
Distinguished Contributor
wbrustle
Posts: 170
Registered: ‎11-12-2007
Message 8 of 8 (290 Views)

Re: contours around curves

06-24-2013 04:23 AM in reply to: Neilw

ok...I will try that....thank you!

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