AutoCAD Civil 3D :: Surface Created From DEM File
Dec 2, 2013
How to best smooth a surface created from a DEM file? Contours produced from the surface, particularly in the flatter areas seem to be following the triangles, so you can see the rectangular nature of the grid.
I've attached a screenshot with the contours shown. Up to this point when creating the surface, all I did was add a data clip boundary, then add the DEM file (manually within the surface definition, not using the "create surface from DEM" feature). I had tried some of the options under surface edits & smoothing, natural neighbor interpolation, but the results were still all wonky.
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Dec 17, 2013
Is it possible to export created surface from civil to revit architecture? If yes , How? And if its not possible - maybe i can somehow import cogo points to revit?
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Apr 10, 2013
I have a profile with an eg surface and a fg surface made from design tool. Now I want to import a proposed surface in there too.
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May 6, 2013
I created a surface in 2013 for an old project by importing a TIN from LDD, which worked fine, but the survey crew recently went back to the same site and did an update (asbuilt) with updated elevations. A good portion of the survey is still accurate and has not changed, but there was an area of new construction. My question is what is the best way to remove the old TIN lines (that are actually still connecting some old, incorrect survey points) and incorporate the new elevations that will now reflect new TIN lines in certain areas. Basically, I need to get rid of some old TIN lines and replace with new and updated survey. The surface in LDD used a point group, which was fine then, but now some of those points in that point group are incorrect.
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Jun 19, 2013
I am working on and manipulating the data may need to be done using the translate survey database command in the next couple weeks. The surveyors are waiting on some boundary info., which may not be available for a week or so. I have all the points inserted, and line work is done. How I go ahead and build a TIN surface, what tools ,if any are available to rotate a surface after it is originally built. The surface will have to adjusted to match the new location of the points when adjust the data.
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Aug 26, 2012
I've tried this on three different machines now, definitely seems to be a bug. We are creating these on the X drive or Autodesk 360, do n't know if it does with any file folder, but guessing it probably does since the sync is an external process.
Autodesk Infrastructure Suite Premium 2012/2013
Windows 7, x64
Xeon E31225 w/ Quadro 600
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May 29, 2012
I´m having problem with creating stl file from surface. I need to import stl in another program for rockfalls.
I have create surface from contours, then extract faces, extrude them, union and I got solid..
I have export solid like stl file... But in another program my surface is not smooth, like somethning went wrong while exporting stl, because in autocad civil 3D 2012 everything looks good.
I have found out how I can increase facetres to 10, but It has not affect to my stl file. If there is some another parameter for better resolution of stl files?
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Jun 14, 2012
I tried usign the xml export and import it on the other file, the surface comes in fine but the break lines do not come in.
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May 13, 2013
I have one little question. Do you know how can I cut the limits of one surface which I made from DEM file (asc)?
The surface that I made is 15x15 km2; but I only need, for example, 6x15 km2: I want to erase the east of the surface.
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Feb 12, 2013
I have been provided survey data in the form of an XML file that I am using to build a surface. Everything is fine, except for the drawing with the surface is still referencing the XML file. What is the best method to remove this reference and have the surface fully contained in one file? Using C3D 2012.
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Aug 21, 2013
I have downloaded ArcGrid (ADF) files from the USGS and am trying to define a TIN surface in Civil 3D with those files. I have done this in the past without difficulty but now I get a fatal error and the system crashes in the middle of the process. The ADF files are large, approximately 465 meg, and cover an entire USGS quad area. Is there any tricks or sollutions that would allow me to use this data source to create surfaces without my system crashing?
The system I am using is a Dell Intel Xeon CPU, W365@3.20GHz with 24 GB RAM, 64 Bit OS.
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Mar 18, 2013
I think this should be an easy thing to do, but I am having problems figuring it out. I need to repath the location of a point file being used in a surface. My surface will not rebuild because it can't find the point file originally used. Drawing was used on a different computer system, so the point file directory is now pointed to the wrong path.
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Jul 10, 2013
my colleague that is on holidays right now sent some civil 3d drawings that contain data references to another office and they are having broken reference issues with the surfaces. I opened the drawing in our office and the surfaces are there and showing the data ref symbols in prospector but when i look through the data shortcuts folder below in prospector the surfaces are not there.
how do i locate the .xml files or if they have been deleted how do these surfaces appear in my drawing.
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Apr 11, 2013
I am trying to edit the elevation of a JPEG image I have brought into my C3D 2010 file as an xref - I essentially want to 'drape' the image over the existing ground surface I have created to use for presentation purposes i.e. to show how our road layout is predominantly located along the ridge lines of the site.
Typically for other file types I would perform the following steps (using the classic toolbar): Grading > Edit Feature Line Elevations > Elevations from Surface > Select the existing ground surface > select object.
I don't seem to have the ability to select my jpeg xref using this approach... how else can I perform this task?
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Apr 19, 2012
I have contoured an irregularly shaped site that is required to be covered completely by a liner. Is it possible in autocad 2002 to get the area of the surface i have created?
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Mar 14, 2013
I can only change the layer color.
But I can't change the cross simbol, its drwaing scale.
Also cant view the point number,....
Maybe I cant view or set these properties when points were added using "Point Files" option.??
Civil 3D (2013)
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Jan 17, 2012
I am working C3D 2012. I have a proposed alignment and profile design by another firm that I had to tranfer into C3D. I had no problem getting the horizontal alignment to display from a text file. I tried to do the same with the profile by using the 'create a text file and create the profile from file' command. I got the POB, PI's, and POE to display. I then defined the VC. I wanted to verifiy that the profile was indeed accurate compared to what we were provided. So I tried to execute a profile report PVI Station and Curve Report - I keep getting an error that "No FG profiles in dwg".
I know the Proposed profile is indeed set to proposed in the properties. I have noticed that the icon next to the profile I create from the text file is different than the profiles created from scratch.
Is there a way to convert this profile to be recognized as a FG profile?
Intel Core i5-2500K CPU @ 3.30 GHz
8.00 GB
64-bit
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Apr 12, 2012
I have a bunch (hundreds, so manual input not an option) of X,Y points without elevation data that I would like to import into a DWG and assign an elevation that is based on an existing surface object. Is there a way to do this for a point file? The command for inserting individual points would be the "Create points - Surface > Random" but I don't see a way to do this in a batch type method where i have my PNE formatted input file to just move the points to sit on the existing surface.
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Jun 7, 2013
what determines the way the surface is created when lofting. I am creating a shape and a path but i cant seem to get them surface to follow the path. It always gets creating in a different axis. Is there a way to control that?
Here is an image it should be following the line i made
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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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