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Civil 3D breaklines giving wrong contour elevations.


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Posted

I'm somewhat new to Civil 3D 2013 and have never encountered this problem before. I've got a top slope standard breakline (dark green line) and bottom slope standard breakline (light green line) with the highest elevation for the top slope at 72' and it gradually slopes down to about 54' within a 75' span. My problem, as you can see in the screen shot below, is I am getting 54'-59' elevation contours right next to a survey point with a 72' elevation whenever I hover my mouse over one of the contours. There are no nearby points with anything near 54' even outside of the surface boundary (shown in magenta). I'm sure this is an easy fixed, but it has stumped be for the past couple hours.

 

51caGvk.jpg

Posted

Have you checked the elevation of the top slope breakline near the spot height of 72, using ID of the endpoint of the breakline?

 

It looks to me as if the breakline elevation does not correspond with the survey point elevation.

Posted
Have you checked the elevation of the top slope breakline near the spot height of 72, using ID of the endpoint of the breakline?

 

It looks to me as if the breakline elevation does not correspond with the survey point elevation.

 

I think you're right... when I look at in on it's side in 3D the polylines are much lower than the rest of the contours and they sit on a flat plane as well. Any idea what might cause that? Usually when I connect the points with a polyline and then distinguish them as breaklines it works just fine.

Posted

I am not sure how you create your breaklines.

 

I use LandDesktop 2005, and draw the breaklines as 3D lines from Point to Point using a Node Snap, so I know where they are. Perhaps you can edit that end of the breakline and make sure it agrees with the survey point elevation.

Posted
I am not sure how you create your breaklines.

 

I use LandDesktop 2005, and draw the breaklines as 3D lines from Point to Point using a Node Snap, so I know where they are. Perhaps you can edit that end of the breakline and make sure it agrees with the survey point elevation.

 

I was connecting the points with a 2D polyline... oops.. lol. I just used 3D lines to connect them and all is well again. Thanks for the help!

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