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jamesbarnett
Posts: 67
Registered: ‎01-09-2013
Message 1 of 14 (713 Views)

Jagged, ugly contours, can the vertices be reduced?

713 Views, 13 Replies
10-15-2013 04:13 PM

Everytime I go through the trouble of making a dynamic surface I get griped at because my contours look like crap, so my boss redraws everything and uses Carlson since his contours are nice and straignt. I attached a few screenshots of the two compared with each other. I have tried smoothing using the NNI the contours smoothed.jpg actually added 13,000+ more points. The only way I've been able to get my conours to look as good as his is to use polylines and add them to my surface as contours. This just defeats the purpose of a dynamic surface though. Is there any way I can decrease the vertices of the contours so the wil straighten up, or tell them to only hold to breaklines?



AutoCAD Civil 3D 2012 SP4
Windows 7 (64)
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Neilw
Posts: 2,201
Registered: ‎09-04-2006
Message 2 of 14 (688 Views)

Re: Jagged, ugly contours, can the vertices be reduced?

10-15-2013 05:35 PM in reply to: jamesbarnett

It's an age old problem. I typically do as you do, add some hand drawn contours to smooth the rough areas. I think it's a better solution than smoothing the surface which adds more processing overhead. If the design changes you have to remove the contours to see where the unaltered new contours lie, then adjust their position and re-add. In case you weren't aware, we can now use splines as contour data so that simplifies the process of drawing and moving contours.

 

There is no way to adjust the number of vertices on contours that are part of a surface. The only control you have is to adjust the interval of interpolated vertices on brealines when you add them to a surface.

 

How does Carlson do it? Does he have to draw contours?

Neil Wilson (a.k.a. neilw)
Infrastructure Suite/C3D 2013, LDT 2004, Power Civil v8i SS1
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Neilw
Posts: 2,201
Registered: ‎09-04-2006
Message 3 of 14 (651 Views)

Re: Jagged, ugly contours, can the vertices be reduced?

10-15-2013 09:56 PM in reply to: jamesbarnett

I took a closer look at your screen capture and something doesn't look right in your C3D contours. I don't understand why they are bowed like that vs. the straight Carlson contours. I'm also surprised to see how dense your TIN is. Do you typically apply a supplementing interval that dense on your breaklines or did you do that in your efforts to correct the contours?

 

I'll need your data to troubleshoot the problem. If you can clip out a portion of your model and post it I'll evaluate it.

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
RADEON 6450, 1 GB
http://www.sec-landmgt.com
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neilyj
Posts: 3,671
Registered: ‎08-01-2008
Message 4 of 14 (633 Views)

Re: Jagged, ugly contours, can the vertices be reduced?

10-16-2013 01:08 AM in reply to: Neilw
....and of course, all contours are lies...:smileywink:
neilyj
(No connection with Autodesk other than using the products in the real world)


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Valued Contributor
jamesbarnett
Posts: 67
Registered: ‎01-09-2013
Message 5 of 14 (596 Views)

Re: Jagged, ugly contours, can the vertices be reduced?

10-16-2013 05:35 AM in reply to: Neilw

Apparently he draws his contours by hand because he thinks Carlson's contours are too crooked also. So I'm not as aggravitated at the software as much as I was then. I do the supplements sometimes to help straighten the contours. I did it that time just to show that I was using that feature. I will just keep on keeping on adding the polylines and splines for my contours then.



AutoCAD Civil 3D 2012 SP4
Windows 7 (64)
Distinguished Mentor
JeffPaulsen
Posts: 774
Registered: ‎09-01-2004
Message 6 of 14 (584 Views)

Re: Jagged, ugly contours, can the vertices be reduced?

10-16-2013 05:50 AM in reply to: jamesbarnett

Your last post clears things up a lot. I was going to ask it the tin lines looked the same in Carlson as they did in your screen shot.

 

I have found that adding additional points many times causes the contours to bow and/or get jagged. This is situational and in some cases adding points helps. For roadways though I find fewer points arranged in sections perpendicular to the alignment produces the best results.

Jeff Paulsen
Civil 3D 2012 SP3 | Win 7 64-bit SP1
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Neilw
Posts: 2,201
Registered: ‎09-04-2006
Message 7 of 14 (549 Views)

Re: Jagged, ugly contours, can the vertices be reduced?

10-16-2013 08:55 AM in reply to: jamesbarnett

If he is hand drawing his contours in Carlson then what is he gaining be re-doing everything?

 

Typically I only see jagged contours in cases where there are large spans/areas between breaklines. From your screen capture it seems there should not be that problem. I am especially puzzled about that bowing effect.

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
RADEON 6450, 1 GB
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Neilw
Posts: 2,201
Registered: ‎09-04-2006
Message 8 of 14 (545 Views)

Re: Jagged, ugly contours, can the vertices be reduced?

10-16-2013 08:57 AM in reply to: Neilw

I do think it is due to the high density of TIN lines you have. What happens if you reduce the supplement factor on your breaklines to maybe 5'?

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
RADEON 6450, 1 GB
http://www.sec-landmgt.com
*Expert Elite*
Joe-Bouza
Posts: 4,753
Registered: ‎12-15-2008
Message 9 of 14 (521 Views)

Re: Jagged, ugly contours, can the vertices be reduced?

10-16-2013 10:41 AM in reply to: neilyj
Yup!
Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
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Intel Xeon CPU E31240 @ 3.30 Hz
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Note: Its all Resistentialism, so keep calm and carry on

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Joe-Bouza
Posts: 4,753
Registered: ‎12-15-2008
Message 10 of 14 (519 Views)

Re: Jagged, ugly contours, can the vertices be reduced?

10-16-2013 10:45 AM in reply to: jamesbarnett

You definately have a dense TIN. how did the feature lines get defined?

I would start with sparse data and intensify as things evolve (I would hold off adding elevation points). you can always remove from surface def ans re add with suplimenting changes until you fine the right balance.

 

 

Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
12 GB Ram


Note: Its all Resistentialism, so keep calm and carry on

64 Bit Win7 OS

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