AutoCAD Civil 3D :: Sedimentary Data - Creating True Surface / Gaps And All

Dec 11, 2012

I have received some sedimentary data of a seabed. I also have other geological layers the sit beneath (all in XYZ format). I have created point clouds using this data and would like to create a surface in order to use the elevational banding to represent thickness. Here lies the problem.

When creating a surface from the point cloud (whole extent), C3D seems to fill in gaps in the data. Is there a way that C3D can create a true representation without all the lines joining parts up? I know that I can edit the surface by deleting lines but this is very time consuming and I'm wondering if there is an easier way to do this. This problem isn't exclusive to point clouds either, as it does the same when adding points to a new surface.

I have attached a couple of screenshots. The first shows a Point Cloud with colours showing the desired effect. Unfortunately C3D doesn't allow me to print this. The second image shows how the surface looks when created.

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AutoCAD Civil 3D :: Filling Gaps In A Surface?

Apr 10, 2012

Is there a way I can fill the gaps in this surface? The surface is a combination of four pasted surfaces with boundaries set so they dont overlap on each other and create a mess.. I can't have these holes/slivers in it because SiteVision wont accept it.  So basically is there a command that will fill the gaps in for me?

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AutoCAD Civil 3D :: Creating Subset Surface From Main Surface

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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AutoCAD Civil 3D :: Surface Data To GIS

Jun 10, 2011

I do a lot of hydraulic modeling and create river bed surface datafrom surveyed points.  I need to be able to transfer the surface data from Civil3D to GIS effectively.  The issue is that GIS does not maintain the fidelity of my surface based on the breaklines I've drawn.  It triangulates based on vertices and often triangulates through the feature lines.  In LDD, I was able to do address this by adding vertices to my 3D polylines in a batch-type function.  That is, I could select all of my 3D polylines and add vertices to them at the same time.  In Civil3D, I have to add vertices to each feature line individually. 

Any way to add vertices to feature lines, or to a surface, in a more efficient manner that maintains fidelity of surface data in the transfer from Civil3D to GIS?

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AutoCAD Civil 3D :: Add Data To Surface

Oct 30, 2013

I am learning to use surfaces in drawing, My main aim is for volumisation tasks. I had been following a tutorial that relied on creting surfaces. i.e

1) from the home tab> Surfaces> Create Surface

2)Add data. From Modify Tab>Surface> Add Data> Point Files.

This worked for me to start with but after changing some settings (looking to display a missing toolbar, I clicked or unticked one  or two boxes, Not sure where, I know silly!). The only options I have in the drop down from "add data" are: Boundaries and DEM files. All other options in the list are not clickable.

What setting I need to change or perhaps restore all settings to default. Any comments on volumisation (spoil heps, Data is x,y,Z from survey equipment.

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AutoCAD Civil 3D :: Data Referenced Surface

Dec 7, 2010

I have created a data shortcut to a surface using Civil3D 2011. When I create a reference to it in another drawing, it shows up in the Prospector but nothing shows up on the screen. I have played with the surface style and made sure all the layers were on and tried closing and reopening the drawing.

I have also tried to reference it into a brand new blank drawing and I even tried to reference a surface in a different file that I have referenced several times before (in 2010). Every time I get the same results. It seems like the surface is there, but I just can't see it.

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AutoCAD Civil 3D :: Surface Data Ref Anomaly?

May 23, 2012

I have a surface made up of gradings and feature line that I had to come back to and edit. I picked the surface and selected go to source file and when I got there one of my infill's has gone missing and the surface has a big hole in it. The weirdness is the sheet file that refs it does not have the hole. What is that all about.

P.S. Editing a surface built up like a Rube Goldberg contraption is no fun at all. Glad my best practices are coming along since  

Civil 3D 2012 & 2013
HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
12 GB Ram
64 Bit Win7 OS

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AutoCAD Civil 3D :: Create Surface From 3D Data?

Oct 31, 2013

I am working in Civils 3D 2014 and I have a survey with points already on the correct elevation layer, I have tried creating a surface from this but it does not show up.

My process:

- I create a new drawing and insert a block (my topo survey) and click explode when I do this

- I create the surface by TIN and make sure I have the correct layer for the points that I am selecting

- Click ok

- Then go into that surface and turn on all layers and refresh - still nothing

- I also made sure that my surface style was 1m contours so I would definately see this.

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AutoCAD Civil 3D :: Create Surface From GIS Data

Dec 16, 2013

I have created a contour layer in MAP and need to bring the data into Civil (to create and EGL surface) which I usually I do via an alter properties query.

There is the Create Surface from GIS data in 2014 but this requires shp files so the two questions I have are:

Can the contour layer be output as shp files (and if so how)?

If yes, is this easier/more efficient than my current workflow?

(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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AutoCAD Civil 3D :: Adding Survey Data To A Surface

Dec 16, 2013

I am using AC3D 2014.  I have created a surface from downloaded DEM points, but, as expected, the contours are not as accurate as I would like.  They vary from known elevations anywhere from a few inches to several feet.

I also have survey data from approximately 500 points which include Northings, Eastings and Elevations.  Is there a way to add these points to my existing contour surface and incorporate these know NEZ points such that he contour surface is more accurate?

I have already converted my "known point" file to a .txt format with comma delimited information.

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AutoCAD Civil 3D :: Contour Surface And Data Point

Feb 11, 2013

I'm working on a topo survey and the contours are crossing each others (See attached pic) and what I did was edit the surface by adding points. I know that these points are fake, but how does this affect the terrain surface for design point of view? I did try swapping edge and deleting lines but makes it worse. Also as you can see in the pic, I don't see the added points like it did back C3D 2008.

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AutoCAD Civil 3D :: Field Data For Surface Creation

Feb 1, 2013

I have a 1 mile road topo coming up for design purposes.  The curb is standard, but there is full curb & depressed curb.  If you had your way from the CAD seat, what shots do you prefer?

Most accurate I've seen iis Centerline, Edge Pavement/Edge Concrete Gutter, Flowline Gutter, Face Curb, Back Curb.  More fieldwork, but made a good product. 

What I have seen is CL, EP, BC, then "let them just use a template" and several variations thereof.  

I have never seen a good way to automatically offset from say BC only and  handle depressed curb by field coding.

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AutoCAD Civil 3D :: Data Reference Surface Disappears

Feb 21, 2013

I have a Surface that is data referenced into many different drawings. On one of the drawings, the reference will not show contours until I sync. It will show the boundary. Just one of them...but I can't use sheet set manager to publish drawings since I have to open it up and sync. Is there a setting we changed? The styles are all the same. The surface is on C-Surface, the boundary is on C-Surface, the Contours are on C-Surface-MJR, C-Surface-MNR.

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AutoCAD Civil 3D :: Visualizing Surface Data Tutorial Files

Apr 8, 2012

I have checked my data folder and I cannot find the file Surface-7.dwg used in a surfaces tutorial.  It's a multi-view block.  I checked my entire hard drive and it is not there.  Can the files be downloaded?  I can't seem to find where I can do this.

As a matter of fact, the location where the tutuorials say to look, Windows 7: C:ProgramDataAutodesk AutoCAD Civil 3D2012enuData,  does not exist on this Windows 7 Home Premium computer I am using.

Windows 7 x 64
Nvidia GeForce GTS 450
8 GB Ram
Intel Core i5-2310 @ 2.90 GHz
v. F.107.0.0 AutoCAD Civil 3D 2012 SP1

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AutoCAD Civil 3D :: Existing Ground Surface And Data Shortcuts?

Mar 27, 2012

I have a rather large project for a roadway reconstruction.  Therefore, the existing utilities are in a separate drawing and the existing ground surface model is in a separate drawing.  All the above surface items (curb and gutter, asphalt, concrete, signs, sidewalks, landscaping, etc..) are in the master drawing.  I then xref'd in my utility drawing and though I would use data shortcuts for my existing ground surface drawing.  I took the surveyed triangles (3d faces) from our raw survey drawing and copied them into my surface drawing, created a surface from the triangles, created a boundary and such.  So far everything is good.  I created the working folder for the data shortcuts for this project and saved the drawing and closed it.  I went into my master drawing and clicked on "Create Reference".  I did not promote.  The reference came though and everything is fine.  Now I want to add contour labels in my surface drawing which I did but they do not show up in my master drawing but the contours themselves do.  Do I have to promote this drawing into my master drawing so I can create the contour labels in my master drawing?  I guess that is fine but the issue is we have small areas of topo that will be added as needed down the road.  If I promote the surface drawing into my master drawing then when I add topo to the surface drawing, it wont update in my master drawing. 

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AutoCAD Civil 3D :: Can't Locate Surface Data Reference (XML) File

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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AutoCAD Civil 3D :: Surface Data On Section Views Disappeared

Apr 8, 2013

I created some about 20 cross sections for a creek we topo'd and then went to work making the topo itself look presentable. After I was all done with that I noticed my cross sections had lost the surface data and were now just an empty grid.

When I go to edit a cross section's properties in the elevation tab the "Automatic" choice has a minimum and maximum elevation of 0. When I use one of those existing sample lines to create a single cross section the same thing happens, it's not picking up data from the surface. However, when I made a new sample line along the existing alignment it picked up the elevations and created a cross section just fine.

Is there anything I can do besides recreating all the sample lines and cross sections? I'm looking for any other way because I have already labled and put in some extra work on the cross sections and I'm hoping to be able to just recreate what I already did and drop them so it will match the linework I already did.

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AutoCAD Civil 3D :: Data Shortcut Surface From 2013 Into 2012?

Aug 29, 2012

Is it possible to data shortcut a surface from c3d2013 into c3d2012?

I tryed it and it says that the surface is in the drawing but its not showing up.

I've tried changing the style and the layer but nothing works.

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AutoCAD Civil 3D :: Adding Data To A Surface / Non-Destructive Breakline

Nov 7, 2012

When adding data to a surface, there is the option to add it as a "Non-destructive" breakline. [URL] .....

What is this good for? I created a surface, copied it, and created a volume surface between the two of them. As expected, the resultant volume was 0.

I then draw a 3d polyline and snapped to elevations on the surface. I then took that 3d polyline and moved it up 5'. I then added that breakline to the surface as a "Non-destructive" breakline and the resultant volume between the original surface and the one modified with the new breakline was still 0. Absolutely no change was made to the actual surface, it just added additional triangles. 

I'm trying to find a reason it's even option and I'm coming up blank. There has to be SOME reason it's there.

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AutoCAD Civil 3D :: Creating A Top Surface?

Dec 11, 2013

If I change a point or link code in one of my subassemblies, is there a way I can build my top surface using those?

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AutoCAD Civil 3D :: Creating A TIN Surface

Aug 19, 2013

In the Surfaces Tutorials: Exercise 1: "Creating a TIN Surface". The first instruction is to click "NEW", which I did. I selected "Surfaces.dwt per instructions and clicked open. I have executed these steps a number of times to be sure I am doing what the instructions say. But, every time the same thing happens. "Drawing2.dwg" opens instead of "Surfaces.dwt". I also make sure the file type is set to dwt.

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AutoCAD Civil 3D :: Drawing Has Disassociated Surface And Alignment Data References

Aug 28, 2013

I am working on roadway project where I am using Pipe Networks to layout the drainage infrastructure.  I have set my working dwg up so that I am data referencing the existing surface and proposed alignment.  I have set my pipe network up so that it is also referencing this surface and alignment.  Everything was working fine.  Labels were pulling the correct information from my surface elevations, and stations were being referenced as well, until I got a message that recommended that I recover my drawing. 

I ran recover and my surface and alignment data shortcut disappeared. My pipe network now shows questions marks where there were once stationing and it appears that the surface and alignment have completely disassociated themselves from my drawing, however they appear in the prospector, but cannot be refreshed.  Again the data shortcut symbol is no longer next to my surface and alignment, but there is a symbol telling me that those objects are being referenced by another object in my drawing (my pipe network).   I have tried refreshing, resetting the working folder, all to no avail. 

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AutoCAD Civil 3D :: Get Alignment Object From Data Referenced Corridor Surface

Oct 25, 2012

is it possible to get the alignment name which the corridor surface is built from when the surface is being data referenced. in other word no corridor as the middleman.

the way i see it is when corridor suface is referenced, it becomes a regular surface and loses some properties such as parent alignment.

i am still using COM. maybe .net can do it? either way works.

Civil 3D 2012
Work: Xeon W3503, 12GB, Quadro 2000, Dell P2211H x 2
Home: 3930k, 12GB, GTX 590, U3011, QX2710

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AutoCAD Civil 3D :: Creating A Surface From Points?

Jul 30, 2013

I have a grid survey of points and I've entered these points into Civil 3D.  Now what I want to do is use these points to create a surface so that I can create a slope analysis of the surveyed area.  My problem is that I can't get the points into a point group.  

I have a generic grid (15 x 15) of points set up and I've only used a portion of them (defined by the dimensions of the site).  So I want to create a surface that includes all of the points that aren't set at an elevation of 0.  

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AutoCAD Civil 3D :: Creating Surface From Corridor

Jul 11, 2013

I am trying to create a surface from a corridor.  I have a sub-assembly attached, which I believe is working correctly.  I managed to create the empty surface and when I try to add surface data nothing seems to happen.  I keep changing the specified code to Base which is my finished gravel structure and hit the + but again nothing seems to happen. 

Ultimately I am trying to determine a volume between my corridor and original topo.

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AutoCAD Civil 3D :: Creating A TIN Of Planar Surface

May 27, 2012

I can't seem to create a planar surface that shows up in the tool space as a TIN.

Some background, I have a TIN of a pile of dirt that I created from a point cloud (it shows up in the toolspace under the surface section). I also have a plane that intersects that dirt pile which indicates ground level. I want to be able to calculate the volume of the dirt pile by creating a volume TIN with the ground plane and pile TIN, but the ground plane does not show up in the toolspace under the surface section so I can't use it to create a volume TIN. I created the plane with the planar button in the ribbon and manually lined it up with the pile.

How can I convert this plane that is clearly in my project but not in the list of surfaces in the toolspace into a TIN to use in a volume TIN?

I'm running Civil 3d 2013 and you'll probably have to explain things like I'm 5 because I'm not familiar with the interface yet.

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AutoCAD Civil 3D :: Creating Tin Surface From USGS Map?

Apr 2, 2013

I have a project that I need to map the terrain as a tin solid so that I can do some cut and fill analysis.  I have downloaded a orthographic and elevation data from the USGS website.  I cannot get AutoCAD civil 3d to create the contours properly.  

My current workflow is: use mapwspace to bring up the task pane.  Connect to the geotiff image in the 1-153383539 folder.  Then I try to create the contours and the option is greyed out.  

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AutoCAD Civil 3D :: Creating Surface From DGN Contours

Dec 10, 2013

This is the first time I have imported a .dgn file into Civil. The drawing contains contours lines with Z elevation data. When I create a surface using this geometry (polylines + some lines) the surface seems to be scaled in the Z axis by 12.

For example pline (from dgn) is at elevation 46' but the Civil3D surface is 552'

I assume this is a setting in the Surfaces dialog box, but I cannot find it.

Also the elevation field in Properties from the dgn contours is weird. For example, in one area the (pline) contours display -28', 26', -24', -22', -20', -18' in Properties but Civil3D interprets this as a downward slope - which is the actual field conditions. I don't understand the conversion going on here.

The geometry of the pline and contours generated from the surface seem to line up in a side or isometric view (see attachment).

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AutoCAD Civil 3D :: Creating Smooth TIN Surface

Oct 1, 2012

Been chatting with an architect in my office, and he was asking me if we could make our TIN surfaces smooth.  I cannot find a way, would it take a 3rd party program?  He wants it like the image i attached. How to achieve this with a TIN surface?

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AutoCAD Civil 3D :: Creating A Subgrade Surface

Oct 11, 2013

I have a finished grade surface created for my site but I want to lower the parking lot portion of it to subrade elevation.  What would be the ideal way to lower a portion of a surface?

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AutoCAD Civil 3D :: Creating Lowest Surface

Apr 24, 2012

I will try to write this as clearly and shortly as possible.

I have two surfaces created lets call them Surface A and Surface B.

They have different elevations in different areas, sometimes Surface A is below Surface B and other times Surface B is below surface A.

Is there a way to easily create a Surface C which is a combo of Surfaces A and B taking which ever surface is lower?

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