AutoCAD Civil 3D :: Exporting Surface As DEM
Aug 3, 2013
I'm trying to export a surface as a DEM so that I can import the object into Bryce 7.1. I have a number of sample DEMs that I have downloaded from USGS site that import into Bryce quite nicely. These samples also import to another DEM reader named "3DEM Version 20.7." I'm able to import into Bryce when I set the grid at 10, but the quality of this surface/object is not very good. The DEMs from Civil 3d are referred to as "USGS DEM"s, but they do not load on common DEM readers such as Bryce or 3DEM software. Any way of converting a C3d DEM to a USGS DEM that one of these other readers can import?
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Apr 12, 2013
I exported my surface to xml, then imported it into a blank drawing and the two surfaces looked different. The new drawing surface appears to be ignoring the surface. So after reading a post on here, I went back to the original drawing extracted the border and attached it back to the surface and tried again. I can not seem to export a surface and have it import with the same look. To be clear I am not talking about styles, I can not achieve the same definition look.
Civil 3D 2013
HP Z400 Workstation
6GB of RAM
296GB HDD
ATI FirePro V5700(FireGL)
Win 7 Home Professional
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Jul 11, 2013
We have an "original" existing surface of a ditch, a massive ditch. dredging has taken place and now we have a new existing surface of the ditch. the client wanted to see the delineation between the areas that are now 3" lower, 6" lower and 9" lower (and so on). I was able to do this easily with elevation banding. now the client would like some sort of GPS uploadable based on the color map that shows the banding. How to accomplish this without having someone set there and set points along the different colors on the surface. that is going to be incredibly time consuming. is there an automated way to export the data that I am looking for?
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Apr 28, 2013
I'm really struggling with exporting a surface to XML.
I made a surface in which I paste all relevant corridor surfaces for the subarea of the project.
The surface looks OK in the file, but when I export, the XML file ignores my few edits, and adds excessive triangulation between adjacent corridors.
I already tried with adding boundaries, creating snapshots, exporting to XML 1.0 1.1 1.2, and regardless of what software I use the resulting XML, it looks crap, and the drainage team is struggling to work with it.
==== i7 @3.4GHz ==== 8GB @666MHz ==== ATI/AMD @675MHz ==== win7 x64 ====
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Jul 7, 2010
My workflow consists of building a point cloud object from a LAS file, filtering it for ground data, and and building a surface object with it. Breaklines are inserted into a surface object, and then the surface object is exported to a DEM file to be used in a GIS application. The problem is that Civil 3D rounds the elevations to 1-foot intervals, even when the file is structurally floating point. How to override this rounding to get floating point values that reflects the original data?
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Mar 11, 2013
with the Genio Exporter. I need to export the surface triangles from my job, but the Genio export dialouge box only gives me the option to export suface boundaries.
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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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Nov 8, 2013
I am rarely new to map 3d. What I would like to do is to export 3 dem surface in any kind of format, so that I could open it in 3d max.
I know how to generate Contours, but when I export them to dwg and later open in autocad architecture there are missing info on z coordinate - so everything is flat.
Is there some way to make .3ds file or .dwg file so that would really look like a 3d terrain in ACAD architecture or 3d max?
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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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May 3, 2013
I was wondering if there is an easy way to trim one surface to another. Right now, I have two slopes (3:1) that are perpendicular to each other. They meet at a corner and I have extended them past each other so that I could see the intersecting edge. Now I would like to trim them to each other like you would a polyline etc... but I am not sure how to do this.
If I select surf trim, it tells me they are the wrong object type, but they are tin surfaces?
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Oct 24, 2012
I used a 2d polyline to create a surface boundary for a surface created. The polyline is a closed loop. For the boundary type it is outer, unchecked Non-destructive breakline, and mid-ordinate distance = 1.
My problem is that when I do this I only get a small portion of the surface to show up within my surface boundary. If I don't have a surface boundary the entire drawing surface shows up no problem.
The purple polyline is my boundary and the light blue is the surface created within the boundary.
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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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Feb 22, 2012
I had some problems with the xml's civ3d is exporting for other software. Are there option as to what goes in the xml that is exported? I need try just getting the points and breaklines in the xml from CIV3d. Am I missing something here?
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Dec 10, 2012
we have a surveyor who uses terramodel. with 2010 we used to be able to export to a 2000 dwg and he could then convert and import to a .pro file. now, with 2013, when we do the same thing, he gets errors. we need to figure out a way to get our info into his program.
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Feb 22, 2010
When I try to export a shape file (SHP) from Civil 3D, I get to the dialog box on the selection tab and the area that I'm used to seeing that says "Object Type" where you select either Point, Line, Polygon or Text is missing. I can't export the shape files without this option.
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Jun 24, 2013
I Can't think of what might be making this happen, but when I export a single layout to PDF (or to a printer) everything works out as normal. When I Export all Layouts to PDF, my text changes fonts and inserts squares for only some of the characters.
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Feb 8, 2013
I have a question about exporting a 2d drawing to a Shapefile. I have checked out the Help file supplied with AutoCAD Civil #D 2013.
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May 13, 2013
I'm currently using the Autocad Civil 3D 2014 on daily basis for urban infrastructure design. When using Autocad Civil 3D 2013, I always would create feature lines from corridors and then export this file to a ACAD 2007 version, which would read the feature lines as 3D polys. The company's topographer could then use this file to make his markings on the field very easily.
Now, when I do the same process using Autocad Civil 3D 2014, the ACAD 2007 file won't present the feature lines as 3D polys, but as 2D polys. This presents a major inconvenient, because I now have to export the file to ACAD 2007, open it in Autocad Civil 3D 2013, rebuild the surface from the design contours and create a feature line from the design surface; export the surface AGAIN to ACAD 2007 and FINALLY I'll get the 3D poly my topographer can read.
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May 23, 2012
I have to convert my ACAD drawing to shape files for a GIS user. I have figured out how create a polygon, point or line and add object data with the tables. I have my ACAD drawing setup to the requested coordinate system but when I send them the shape files they are telling me that they get a error in ArchGIS stating "an extent that is not consistent with the associated spatial reference information". I am using Civil 3D 2012.
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Sep 10, 2012
I need to export a .SHP file containing some polygons to a GIS user so he can lay the shapes in a GIS map. The data he needs from me is the outlines of several wetlands I've designed in C3D 2010. There isn't any elevation data associated with the outlines. They are just traced waterlines from each pool set into a layer called "permanent pools." He wants these to show location in a GIS plan.
When I try to MAPEXPORT, and then selct each of my 10 pool outlines, it says "no object selected" in the command line.
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Apr 5, 2012
I have a drawing with a LOT of monitoring well symbols which have labels next to them. The symbols are simple drawings and the label is just text.
Is there a way to be able to export these with their coordinates and labels to a tablem (PNEZD style)? If not, and I don't think I can, how do I create a similar item that is "exportable" and would act like a point feature in ArcPad or other GIS based software.
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