AutoCAD Civil 3D :: Breaklines Giving Wrong Contour Elevations?

May 19, 2013

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).

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AutoCAD Civil 3D :: Contour Elevations Disappear When Plot?

Jun 24, 2012

Using C3D 2010.  Drawing looks fine in model and paper space.  When I try and plot (or plot preview) contour labels are gone!  How frustrating.  They will not show up again unless I restart C3D and open drawing.

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AutoCAD Civil 3D :: Set Multiple Polyline Elevations For Contour Data?

Nov 13, 2012

I am working on three different projects at once. For each project, I was sent a drawing with contours as polylines. Each contour is broken up into polylines about fifty feet long each at elevation 0. I am trying to set the polylines to proper elevation without editing each one individually. Each drawing contains several hundred polylines to modify. I was hoping for some sort of way to use a fence and interval (2') with a starting elevation.

I've searched the internet but haven't found a lisp routine to do this. I thought I remember Land Desktop having something like this, but can't seem to find it in Civil 3D 2012. I have found several threads asking the same question. Each time the poster was referred to a blog 7629. That blog unfortunately seems to have been taken down. If I can’t find an answer soon, it looks that my best option would be to retrace each contour which makes me glad to be paid hourly.

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Feb 23, 2012

How does a 97 contour pass through a closed feature line with elevations between 97.3 and 97.8?

C3D 2011 (latest updates)

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Aug 16, 2012

I downloaded a bunch of GIS files for Baltimore City and am trying to compile them to make base tiles we can use for different projects.  I have tried using MapImport and MapConnect to bring in the shp file for the contours.  They come in but without the elevation.  The elevation is brought in as Object Data with MapImport, but is there a way to assign that to the elevation field in the polyline properties?  MapConnect brings the elevation in as part of the table but again how do I get that elevation assigned to the elevation field in the polyline properties?  I just assigned the elevations manually for the 10' contours in one tile.  I have to do about 50 tiles, and it seems like there must be a much better way to do it. 

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AutoCAD Civil 3D :: Non Destructive Breaklines

Oct 6, 2013

I can't just accept something cause it's the way it is. I like to know the reasoning behind it.

Case in point:

Why does the check box say "Non-destructive breakline?" Why doesn't it say, "Erase tin lines that cross boundary?" I doesn't seem to have anything to do with breaklines. Or am I wrong on that one?

While I'm on a roll, double negatives send me into a tailspin. Like "Disable description keys", True or False. Huh? Why not just say, "Description Keys", on or off?

HP DV7 Laptop
Intel Core i7-3820QM 3rd Generation Quad Core 2.7 GHZ CPU
16 GB DDR3 RAM ( 2 DIMM ) / 180 GB SSD
Nvidia GeForce 650M Graphics w/2 GB Memory
Windows 7 Professional 64 bit / AutoCAD Civil 3D 2014

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AutoCAD Civil 3D :: Get Surface Breaklines

Dec 4, 2013

I have this:

for(int i=0;i<= tinSurface.BreaklinesDefinition.Count-1;i++) { .................
}

 I have each breakline sets, but I want each breakline of each breakline set(breaklinesDefinition).

I can do this:

Autodesk.Civil.DatabaseServices.SurfaceBreakline sfb = default(Autodesk.Civil.DatabaseServices.SurfaceBreakline); SurfaceBreakline sfb= trans.GetObject(id,OpenMode.ForWrite) as SurfaceBreakline;
 
But how can I get ObjectIdcollection of surfaceBreakline of one breaklinesDefinition?

I have seen that there is "AECC.Interop.Land.SurfaceBreaklines". Do I have to use this?
 
Autocad Civil 3D 2014 +SP1
Quad Core Intel i7 3770-cpu 3.40Ghz.
ssd samsung 840 pro 512gb+ssd samsung 840 pro 256 gb+1tb hdd
32gb RAM 1600 Mhz.
nVidia Quadro 2000.
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AutoCAD Civil 3D :: Breaklines And Contours

Nov 26, 2013

I'm having problems contouring in C3D 2014.

I'm using the command PL - polyline to create my break lines (Centerlines, top and bottom of curb)?.

 In this particular drawing the first point I click on is carrying the elevation throughout the entire length and yielding bad contours.

Essentially the bottom of curb on each side of the street should be the same elevation with a crown at the centerline.

Instead the elevations are about five feet different because the beginning point is around the corne at a point of tangency on a hill.

This has not happened in any other drawings and I've done them the same way.

I redid the breaklines with the 3DPOLY command and aside from a few minor edits the surface came out OK.

I've been reading about 3DPOLY command but have not found out too much about what the actual difference is between 3DPOLY and PL commands.

Seems like 3DPOLY is the way to go. 

I do not have too much experience with C3D 2014 and am making a huge jump from 2004 LDD. How to build 3D surfaces/contouring.

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AutoCAD Civil 3D :: Mid-Ordinate Distance With Breaklines?

Oct 19, 2007

Where can I set the default for my mid-ordinate distance when adding breaklines to a surface. Would like to change it from 1.0 to 0.1.

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AutoCAD Civil 3D :: 2012 TinSurface Breaklines

Feb 27, 2012

Using the COM Interops we can find the entities which were used toi create surface breaklines:

foreach (AeccSurfaceBreakline brklin in brklines) { object[] ents = (object[])brklin.BreaklineEntities; for (int i = 0; i < ents.GetLength(0); i++) { AcadEntity en = (AcadEntity)ents[i]; //do whatever with the Entity }}

 I have, as yet, been able to figure out how to get the entity(ies) using 2012's .NET API. Is it possible, or do I have to stay with COM?

foreach (ObjectId surfId in CivilApplication.ActiveDocument.GetSurfaceIds()) {TinSurface surf = tr.GetObject(surfId, OpenMode.ForRead) as TinSurface;if (surf != null) {SurfaceDefinitionBreaklines brkdefs = surf.BreaklinesDefinition; for (int i = 0; i < brkdefs.Count; i++){Surface Operation AddBreakline brklines = brkdefs[i]; for (int j = 0; j < brklines.Count; j++){ SurfaceBreakline brkline = brklines[j]; //well, as of C3D2012 SP1 the actual entity associated with this breakline is not exposed via .NET} } } }

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May 30, 2012

In using 2013 I noticed when I delete a feature line which is added to a surface as a breakline it does not delete it from the surface. Even after a rebuild the surface does not update.  I am having to go into the toolspace and manually delete the breaklines from the surface list.

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AutoCAD Civil 3D :: Filter 3DPolylines / Breaklines

Aug 9, 2013

Can you filter 3dpolylines to find which ones have a vertex at 0 elevation? I do not see the option in the Object Selection Filters dialog. We have several 3dpolys which would take a while to go through each vertex.

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Dec 3, 2012

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Sep 27, 2012

I am having an issue with my contours running through my breaklines (feature lines).  I have tried re-ordering the breakline, edits, etc and have also set my settings to allow crossings.

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Jan 7, 2014

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AutoCAD Civil 3D :: Ignore Contours Between Breaklines

Aug 27, 2012

The situation is like this:

I am having a survey plan both with points and contour lines. Points are comming from the main road and contour from the outside areas.

I want to be able to make the surface ignoring the contours between the breaklines of the road since any contour inside professional survey is giving me errors on profiles and everything.

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May 8, 2013

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May 30, 2013

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Here is my list of events after I rebuild the surface:

So I went to use the 'Resolve Crossing breaklines' tool, and here's what that looked like:

So are there or aren't there?

When I use the 'Zoom to' feature, it takes me to the midpoint of a TIN line on a breakline, with no other objects around.  Crossing window selection: only the surface and one polyline. I found one crossing breakline just by accident, not from either of these tools.  After I fixed it it didn't change anything.  I even deleted all the breaklines from the surface and added them again, closed drawing and reopened, no change.

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Apr 4, 2013

how to fix this triangulations.  Adding extra breaklines does not seem to fix the issue. 

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Feb 29, 2012

I am using a breakline to establish contours around the foundation of a building.  I've done this in the past with no problems.  Now I'm getting an Event Viewer, Error message saying that the breakline wasn't added to the surface because it crossed a point or crossed another breakline.  In one case there wasn't another breakline in the drawing. 

I've used 3d polylines & others to establish the breaklines.

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Dec 7, 2012

I had some inaccurate survey points in my EG. Now I have new points and breaklines. How to locate thes old breaklines either within the list or visually within my surface editing / style. 

The zoom to doesn't work as there are many breaklines within the zoom extents, and 1000's of breaklines to sift through.  Is there a setting somewhere in the surface where i can turn on the breaklines that have been added already to something that's visible so i can delete those out of my surface?

I'm looking for anything on this one. (Not the obvious answers thought). Delete all and replace all (not happening).

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Mar 25, 2013

I added three feature lines to my surface as breaklines.  But the triangles still cross them.  Triangles shouldn't be crossing breaklines.

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Apr 21, 2012

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Mar 24, 2013

How to convert a 3D Polyline contour to Polyline contour.

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Sep 12, 2005

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Dec 1, 2013

How to get precise elevations at lowest and highest points. I need to get spots where  the water flows and its precise elevation at that spot as analysis.

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May 3, 2012

In C3D 2012, when I needed to know what elevation a surface contour was at, I simply hovered my mouse near the point in question and a small window would tell me what elevation my mouse was hovering at. Now, in 2013 I am trying to do the same thing but the little window only has the name of the surface and no elevations. So, how am I supposed to know surface elevations on the fly? Is there some setting to turn that back on?

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Nov 20, 2013

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Sep 2, 2013

Sounds simple enough, but how would I subtract 2.300 from every point elevation?  

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Dec 3, 2013

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AutoCAD Civil 3D :: Point Groups Elevations

Feb 28, 2013

I have two different point groups that I am using in my drawing.  One is from a survey done a few years ago and the other is from one that I did just the other day. 

I don't have a problem inserting the points or whatnot, but the issue I am having is that when I click "Datum" to adjust the elevations of my new point group (to make my benchmark 100.00'), Civil 3D alters all of my points; including the ones from the older survey. Is a way to adjust elevations to only one set of points.  

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