AutoCAD Civil 3D :: River Bottom Surface From 3DPolyline Sections
Sep 4, 2012
Is there an easy way to create a tin surface from 3d polylines that are generated by actual measurements of a river/ditch or imported from Hec-Ras (River Analysis -extension)?
The problem seems to be that the triangles should be long and narrow (like the ditch bottom in the example) instead of normal triangles the triangulation method normally generates. (The triangles in the example are generated by 3dwin -program).
When using Hec-Ras one way to go around this problem is to interpolate sections (XS:s) with very short distance. Hec-Ras does the interpolation very well, but I would like to have a better solution without tricks with other programs. Also in the long rivers the result is a very large file.
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Feb 4, 2013
We want to show two surfaces, an existing ground and a proposed ground, on a cross section. When the proposed ground meets up with existing ground, it would be nice for the line to end. With just existing ground continuing on. The surface is data referenced, and I would like to not break either of them. I thought adding a surface mask would cause the proposed surface to stop at the mask, but that doesn't appear to be the case.
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Aug 7, 2012
I have a drawing with some cross sections of road showing the Proposed road surface and Existing ground surface. Now we have received a new ground surface and we have to supersede the old ground surfae with the new one. is there any way to swap the surface in the existing cross sections?
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Oct 30, 2012
This looks like an interesting tool
[URL]....
(No connection with Autodesk other than using the products in the real world)
IDSP Premium 2014 (mainly Civil 3D 2014 UKIE SP1 & Infraworks with some limited 3ds Max Design)
Win 7 Pro x64, 256Gb SSD, 300Gb 15,000 rpm HDD
16Gb Ram Intel Xeon CPU E5-1607 0 @ 3.00GHz (4 CPUs), ~3.0GHz
NVIDIA Quadro 4000, Dual 27" Monitor, Dell T3600
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May 31, 2012
I have a surface built for the bottom of a pond. The way to get the surface area (not the volume) of the bottom of this pond?
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Nov 22, 2013
I'm working on cross sections and ran into a problem. I had to edit my surface but it wouldn't cooperate with me. So instead, I just erased the whole surface and restarted it. After I got my surface the way I like it, I added my sample lines to where they are supposed to be. Problem is, my cross sections turned out blank.
So for now, I skipped to create a surface profile and see both of my surfaces available on the bottom. The old one I deleted and the newly created one. It won't let me go to the bottom and erase the old deleted surface. When I go into my toolspace-prospector....it only shows my newly created surface and nothing more. Is this a reason why my cross sections come up blank?
I'll show you a pic of my toolspace with just the current surface and another pic of the "create a surface profile" showing that it still has both the old and new (all in CAPS) but it won't let me delete the original.
HP Compaq 8100 Elite
Win 7 Pro SP1 - 64Bit
8GB RAM
i7 860 @ 2.80 GHZ
AutoCad Civil 3d 2012 SP1
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Jun 26, 2013
I have a existing surface. I want to create a proposal surface so I can know the volume between boths. This proposal surface is represent for a disposal area that can be filled up to a elevation. I have a bottom of P-surface as a feature line at EL 1608, and I want top of P-surface to EL 1613.
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Apr 30, 2012
I am trying to create a label for slopes in cross sections for a surface created from breaklines using gade breaks as you can not weed segment labels
I am weeding the labels out based on the change in grade of the section profile and making the label text high very small of the labels I do not want to see. But the first label returns ??? because there is no grade coming in so I get ??? instead of something usefull like null. Any way to convert?? to something you can evaluate and use.
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Jul 6, 2012
Am working in River Analysis dwg and go to save and get message "One or more objects cannot be saved to the specified format."
What's the deal?
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May 20, 2013
Where can we find documentation or tutorials on the River Analysis package as it is with IDSU 2014?
We are in the middle of a few projects using BOSS's RiverCAD but with the new 2014 License files we can no longer use the AutoCAD 2010 that ran with RiverCAD.
So, I'm scrambling to get my user up and running with River Analysis and how (if possible) to port our RiverCAD projects to River Analysis with as little pain as possible.
I have to admit, I don't use RiverCAD and have not yet installed IDSU 2014. (I'm making the deployment now).
I'd really like to ditch having to support AutoCAD 2010 and RiverCAD....
[URL] .......
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Aug 30, 2013
I am trying yo model river corridor with 4 locks on it. On every locks different between levels is about 2-3m. I it is possible to create profile perependicular to bottom of river. How to create it?
Another question how to later connect surface. I mean Existing ground and corridor intersect. Ho to prepare later for render Existing ground with cutted corridor river? where I am below EG.
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May 11, 2012
I created a 2d drawing of a river I am building and constructed a centerline. I already have a surface of the existing ground created from which i created an alignment of the centerline and created a profile showing the existing grade along the centerline. Then I created another alignment on the same profile which shows the bottom of my river that I want. I now want to calculate the cut and fill of my project but don't know how. Is there a way I can create a surface of my river from my profile? Or what process do I follow to apply my centerline profile to my 2d river.
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Jul 27, 2013
I have the River Analysis tools installed for C3D 2014 and any time I open a drawing, a reach is automatically created in the file. This is really annoying because it puts it down at the coordinates (0,-500) which pretty much makes zoom extents a useless command now.
Is this as designed? If it is as designed, how to turn it off?
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Jul 4, 2012
I have a series of sheets, each with two viewports to show two plan views of a long road alignment. I arranged them to read bottom to top, as it goes up stationing, as we do with cross section sheets, but have been told by an outside reviewer that the sheets are confusing and should read top down.
How would you arrange them?
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Sep 1, 2013
How to prepare for rendering Existing ground with cutted corridor river? Specially in places where corridor river is below EG. If there is some tool like cut?
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Nov 26, 2011
Im trying to slice a surface into sections. Im not much of a surface modeller, never really tried. For example the surface is a cylindrical shaped piece. Multiple faces, and pieces. When i slice through it, it slices some prices and others it fails to slice. Confusing. I would upload the piece but i cant due to contract restrictions. But is there any methods of slicing or tips that are a common practice when working with surfaces?
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Oct 12, 2012
I am working in Civil3d and have a 3d polyline that i want to generate a 2d section line of i.e the path of the section plane is along the 3d line
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Dec 5, 2006
Im using AutoCAD 2007.
I have done a land survey showing a top of bank - and the bottom of bank, which ive then contoured by using Carlson Survey (AutoCAD engined).
Im trying to draw cross sections through my model that would obviously show the level of the surface.
The bank lines and contour lines are polylines.
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Apr 16, 2012
I am trying to work on a previous file in my office, and when it opens on mycomputer, it does not display as it should.
In general, the purpose of the project is to reinstate the side slopes of a road abutting a river. Cut & fill sections have been generated on 20m station increments along the road corridor/surfaces in order to calulate cut and fill as well as to reference the design to flood levels.
When I open the file, all of these sections (and there are alot) have relocated themselves to various locations in model space, none of which are aligned with the viewports that are being used for printing.
Could it be software and/or hardware incompatibility with the computer they were originally created on? (I believe it was created with C3D 2010, or C3D 2011 - I am currently running 2012)
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Dec 2, 2011
I often have to do storm pond surfaces that (for the purposes of planning) are flat on the bottom. These surfaces are created from a combination of survey data and grading groups and the tin of these surfaces is perfectably acceptable. However, when contours are shown, the flat bottom is shown with contours jig-jagging all over the place.
The attached image shows a comparison of the same pond. The top was created with survey data and grading groups; the bottom was created using contour data only. The generated surface on the top shows the bottom contour going in different directions and has parts where the an expected contour is missing.
How to correct/manipulate the surface to show a proper flat surface?
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Oct 22, 2012
Has instances where you set your tolerance for the maximum triangle lenth to say 50m to reduce the amount of triangles along the edge that run at long distances. When I do this I end up with multiple surface holes and I'm not sure why as there are points in the area.
I thought well maybe it's because i should've reduced my max triangles first then added breaklines. Would this matter? I also thought I could add a line to the surface to fix the holes vs. deleting surface lines along the entire edge of a surface for many many miles.
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Nov 14, 2012
I am trying to add points into a surface. I have done this before without any problems, but now I am having issues.
When I ID points which makes up the surface it gives me the correct Z level e.g. 24.5m, however when I hover over the surface it shows me the surface name and a different z level e.g. 0.65m. What is the reason for this difference in z levels? I think this may be causing the issue I am having when I add new points.
I select the surface and use the 'edit surface command' in the ribbon, choosing add point.
When I add a point at the level I require(23.89m), it puts it in a lot higher than the surrounding area, so I tried to put the point in to the lower z levels (0.4m) it puts it in a lot lower!
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Dec 10, 2012
My goal is coming up with the volume bounded by the design surface and the existing surface. I don't have the design surface modeled yet.
Do i need to create alignment offsets?. Alignment 1 profile view is also attached. Then Alignment2.
What about starting with alignment1 profile view? Since I have created a polyline as the design profile ?
how do I shrink labels? Where is it in the settings ; the Align folder had been check.
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Oct 2, 2012
I am issues with DEM files that I am downloading from the USGS website.I download 24k, elevation for the area I need. I then choose staged 1 second, add a surface to a blank drawing, then upload the DEM files to the surface.
The surface imports correcty, but when I try to import points taken by a surveyor on the same drawing, they plot incorrectly.The DEM surface and the points from the surveyor do not correspond. Also, the DEM surface is in meters, not feet. I have tried changing drawing settings, datum types, coordinate types, etc.
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Apr 4, 2012
Is there any way to change the referenced surface on a Surface Elevation Label. I can see the surface in the properties but cannot change it.
C3D 2011
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Jul 29, 2013
I have a project involving 3 programs. I am creating a planned development in 3d to be 3d printed when finished. The project is a 5 acre tract containing 8 buildings. I have built the surface in C3D and each building in Revit. The buildings are not in the same Revit file. For my solid work, I will bring the files over into 3ds Max Design to section into smaller quadrants to build in the 3d printer.
The questions:
Would it be better to import the surface into Revit to merge surface and buildings together?
Would it be better to import the buildings into C3D to merge entities?
Would it be better to bring those entities into 3ds Max and then merge them into one? Will 3ds Max Design allow me to insert entities accurately in the environment?
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Sep 15, 2013
I need to create a sub-set surface from my main surface. not sure what the vernacular is for a "subset surface" in c3d but i do have a feature line that bouinds the desired area, but that is as far as i can solve.
i did try creating a new surface - pasted the main surface in the edit definition, then deleted triangles until the boundary alighned wiht my featureline. This seemed to work, but when i view the properties of the smaller subset suface, it shows a mimum and maximum elevation that is incorrect.
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Mar 1, 2013
Im currently using an addon for Civil 3D called Novapoint. It allows me to create 3D models of surfaces made out of 3d faces and easily models cut and fill 3d-models for me.
The only thing i need to create a cut and fill model is one or several ground surfaces (existing ground, earth layers, rock etc. whatever i need) and a closed polyline/3Dpolyline that represents the level I want my cut and/or fill model.
I enter the spcifications I want such as; earth cut angle, rock cut angle, fill angle, select which surfaces i want to include in the model calculation and select the polyline.Novapoint then calculates the cut/fill model from the surfaces to the polyline and models the different cut/fill angles and gives me the results in a 3d-face model and a specification of the volyme of rock cut, earth cut an fill.
1. Novapoint is quite unstable and crashes alot
2. You cant create profiles out of 3d faces
3. Novapoint does not automaticly combine the start surfaces with the modeled cut/fill surface
4. A large surface made out of 3d-faces demands alot of computer power
So I want to how I do the same that Novapoint does for me in Civil 3D? (I have access to Civil 3D 2007-2013 depending on which one you're using)I know I can take the 3Dfaces i created in Novapoint and make a surface in Civil 3D with them but I want to exclude Novapoint completely.
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Mar 26, 2012
all of a sudden whenever I run audit on my corridor file the surface definition becomes a snapshot. To add to the drama, the corridor surface will not paste into an empty surface. Why?
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Feb 7, 2013
My problem added with pic ... I want to make volume calculate for sample road project. When I try to compute materials I cant use Corridor surface for DATUM... There is only target surface on option..
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Mar 6, 2012
I am trying to visualize a road project. The problems is, whenever the corridor surface goes below the EG surface (when the road is in cut) the EG surface is the only visible surface.
I sort of need to subtract the corridor surface from the EG surface, or merge the both surfaces into one.
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