AutoCAD Civil 3D General

New Member
Posts: 2
Registered: ‎12-03-2013
Message 1 of 5 (226 Views)

Crossing Tin Lines

226 Views, 4 Replies
12-03-2013 12:55 PM

I have built a alingment, corridor, and surface of a driveway but I have a few holes in my surface.  I tried to add lines to my TIN surface and some filled in properly but others would not and I had TIN lines that crossed (actually they are 4 different lines that meet at on point).  Why does this happen and how can I fix it?

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Posts: 8,880
Registered: ‎06-29-2007
Message 2 of 5 (214 Views)

Re: Crossing Tin Lines

12-03-2013 01:49 PM in reply to: SSicina



welcome !


What version of Civil3D do you have and do you have installed the latest servicepack?

What happens if you export the surface to LandXML and reimport it into a new drawing?


- alfred -

Ingenieur Studio HOLLAUS ...
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Posts: 3,688
Registered: ‎08-01-2008
Message 3 of 5 (204 Views)

Re: Crossing Tin Lines

12-03-2013 02:08 PM in reply to: SSicina
TIN lines cannot cross each other - fundamental principle of triangulation.

try drawing a polyline around the gap areas and add to surface as a show boundary
(No connection with Autodesk other than using the products in the real world)

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Message 4 of 5 (190 Views)

Re: Crossing Tin Lines

12-03-2013 03:39 PM in reply to: SSicina
Tough to say why this happens without your drawing we have no idea how the surface was created. Those "crossing" TIN lines usually happen when you add lines in an area where there are break lines defined.
Matt Kolberg
Cansel - Autodesk Division
New Member
Posts: 2
Registered: ‎12-03-2013
Message 5 of 5 (164 Views)

Re: Crossing Tin Lines

12-04-2013 06:54 AM in reply to: SSicina

We figured out the issue I had not set a corridor border and I had deleted a line that was used within the surface when I was cleaning up the extra daylighting lines.  I ressolved the issue by using a corridor border. Thanks for the help though

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