AutoCAD Civil 3D :: LiDAR Classification

Aug 17, 2010

I have several LAS files that I have brought into AutoCAD and created PCG point cloud files. You have the option to assign Civil3D properties so I assign the LAS classification properties but they don't apply to the file.

The classification style seems to work with the ISD file extension in Civil3D, but do the LAS classifications not work for the PCG format?? I can only view the PCG file by single color or by elevation range, not by classification.

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AutoCAD Civil 3D :: LAS LiDar Import Keep Getting Error?

Dec 20, 2013

In Civil 3D 2014 while import .las or .asc file using point cloud I keep getting an error in processing data message.

I have in the past brought in the data successfully (2012, though not often)?

Datum and projection are correct, the data goings in to ArcGIS(had GIS group five the file a try).

The error message in not any more specific than "there was an error processing data"

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AutoCAD Civil 3D :: LiDAR Generated Surfaces

Jan 14, 2011

I have recently upgraded to Civil 3D 2011 when we started receiving LiDAR data.  I have been playing around with the data a bit and have a few questions on how the data is dealt with.  It appears that when a point cloud is added to a surface, it is using the point cloud display somehow to generate the TIN.  I believe that the point cloud display is showing a percentage of points based on the maximum number of 1.5 million points.  On these particular datasets (citywide LiDAR coverage, about 2,600' x 2,600' panels), we may have 4-7 million points in each LAS file.  Is Civil 3D ignoring all points beyond 1.5 million in surface building operations?  Also, when adjusting the slider, is there any way to know which points will be displayed...or maybe the points are reduced randomly??

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AutoCAD Civil 3D :: Gaps Between LiDar Tiles

Nov 19, 2013

I'm working with an area around a couple miles of road running SW to NE. I have metric lidar tiles in GeoTiff format. The tiles are 1,500 meters on an edge. I'm working in US Survey feet.

I originally tried creating a Surface of all 9 tiles I needed and then cropped the resultant Surface. But that was too large for my computer to handle. So I created 9 drawing each with one tile Surface in it. Now I've created a Data shortcut Reference for them all in one drawing. I got all the Surfaces in but noticed that there were gaps between the borders.

I was wondering if it was a coordinate system conversion problem. But all the settings check out. Now I think that this may be an expected behavior. I measured the gaps between the Borders and found that they all ran very close to 6.56'. In metric that's almost exactly 2 meters. 2 m is the separation of points in the Lidar surface.

BTW I'm working this in 2014.

Civil 3D 2012 SP 3 / IDSP 2014
Dell Precision T7400, Xeon CPU 3.16 GHz
Win 7 Pro, 64-bit,12 GB RAM, Nvidia Quadro FX 4600

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AutoCAD Civil 3D :: Simple Lidar Surface Clipping

Apr 19, 2013

I've been downloading whole tiles from OSIP for lidar surfaces.  I've been using the grid files, and they work great.  But, I don't really need an entire tile while working in my drawing, and I'd like to clip just my area of interest out of the tile.  What is the fastest way to do this? These whole tiles are data hogs, and I fear they are slowing me down. 

I used to have a computer at my old job that wouldn't slow at all using this stuff, so I haven't had a reason to learn how to do this until now when i'm forced to work on a laptop. 

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AutoCAD Civil 3D :: Import LiDAR From GIS Shape Files

Jun 20, 2013

I wanted to import a shape file from GIS, but all contours elevations are 0. The attribute data on contours have ID elevation. How do I query those ID elevation to the contours?

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AutoCAD Civil 3D :: Smooth Road Profiles Created From Lidar

Aug 14, 2012

We have lucky enough to obtain LIDAR for most of our small City as well as ground only points.  My problem is that profiles produced using it are rough and jagged (see attached).  I've tried contour smoothing to no avail as well as point removal.  Perhaps I haven't just tried enough options.

Should mention also I have breaklines along the CL alignment as well as Edge of Pavement.

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AutoCAD Civil 3D :: Slope Analysis Using LIDAR Topographic Base Information

May 10, 2012

Succesfully producing a slope analysis exhibit using LIDAR topographic base information with this version of Civil 3D? I have followed the instructions as best I can and have had no luck. I am using a trial version and this is a big factor in whether or not I will ultimately make the purchase.

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AutoCAD .NET :: How To Rename Existing Classification Object

Jul 30, 2012

My task is to write an automated routine that checks for a certain classification added to Duct objects.

In the classification definition SfB all classification names of the form (XX)X should be altered/renamed to the form XX.X

Defining a Classification object Classfc as Autodesk.Aec.DatabaseServices.Classification my problem is that the property Classfc.Name is readonly.

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AutoCAD Architecture :: Setting Classification For Entities

Oct 17, 2013

I'm try to set a classification for a list of objects with .net. I'va found some discussions regarding changing and iterating classification trees, but none setting the classification for entites, similar to selecting a classification in ui.

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AutoCAD Map 3D :: Gas Line Sliding Mile Classification

May 29, 2012

Working on gas transmission classification using the "sliding mile" for the building count?  If so what procedure are you using.  At this point I have run the 660' buffer around the lines added the address/structure point queried to within the buffer polygon then select all the points along a mile of point to get a count. 

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AutoCAD Architecture :: How To Rename Some Nodes In Classification Tree

Aug 7, 2012

I need to rename some nodes in a classification tree but I keep on getting the exception.message "eInvalidInput" from the exception.source Acdbmgd.

Here is the

CommandMethod("RenameClassificationTreeNode")> _
PublicSub RenameClassificationTreeNode()
Dim ed AsEditor = Application.DocumentManager.MdiActiveDocument.Editor()
Dim db AsDatabase = HostApplicationServices.WorkingDatabase


'Here is the task: Remove paranthesis if present

IfNot (node.Id.IsNull) Then
Dim Clsfc AsClassification = CType(tr.GetObject(node.Id, OpenMode.ForRead), Classification)
Dim OldName AsString = Clsfc.Name
If OldName.Contains("(") AndAlso OldName.Contains(")") Then


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AutoCAD Visual LISP / AutoLISP :: How To Attach Classification Definitions To MEP Objects

Nov 25, 2011

The CADdesigners have asked me if i can make a function that runs through our AutoCAD 2012 MEP model attaching certain predefined classification definitions to ducts, pipes, MVparts etc.

I have used hours searcing for examples / tutorials on how to connect to the MEP objects not finding what i need.

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AutoCAD Map 3D :: Lidar And Vertical Transformation?

Aug 2, 2013

I have Lidar files both IMG files and LAS files. I work in Civil 3D so have most Map 3D functions. We also have IDSP 2014 so I have a full version of Map 3D 2014 in there. The Lidar is in UTM - Meters. I need to create a Civil 3D Surface in State Plane - Feet.

Civil doesn't work with IMG files. I have no problem creating a Point Cloud from the LAS files using that to create a Surface. With the Zones set correctly in the drawings I can get the horizontal aspect of the data into State Plane. However the Elevations are still in Meters. If the LAS files were in ASCII. I would convert them directly, but they're not.

Is there any method in Map 3D to do a vertical transformation on either of these file types?

Civil 3D 2012 SP 3 / IDSP 2014
Dell Precision T7400, Xeon CPU 3.16 GHz
Win 7 Pro, 64-bit,12 GB RAM, Nvidia Quadro FX 4600

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AutoCAD Print / Plot :: WMS LiDAR Image Will Not Plot

Jun 17, 2013

I'm referencing in a WMS image (a momochrome LiDAR image) which shows fine on the screen.  However when I plot, the image won't -- all other aspects of the drawing come through.  It's not on a non-printing layer.  I've fiddled with RASTERPERCENT, RASTERTHRESHOLD, and the plotter properties (currently using a PDF plotter but I have tried others with no success) but can't get  the image to come through.  Adding to the frustration, other images on the same server (i.e. color aerial) come through and plot without issue. Why this particular image won't plot?  According to the WMS administrator, there is nothing on their end that "locks" the image prevening it from plotting.

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AutoCAD Civil 3D :: Profile View Of Alignment In Civil D & Google Earth Varies

Dec 25, 2012

I imported Google earth surface (at eye alt 600m) to civil 3d 2012 and created an alignment of length 181m.

When I exported same alignment to Google earth , it showed the length as 190m ( the difference increases with increase in length of alignment) And also the profile view of the alignment in the Civil D & Google earth varies.

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AutoCAD Civil 3D :: Create A Layer Filter That Excludes Both Civil Layers And Xrefs

May 3, 2012

I want to create a Layer Filter that excludes both Civil Layers and Xrefs.

I have created one that excludes Civil objects (Excel Civil.jpg)  but when I add a filter for excluding xrefs as well the Civil objects appear in the filter again indeed all the layers are included again (Excel Xref.jpg) if I invert the filter nothing is displayed. 

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AutoCAD Civil 3D :: Export Created Surface From Civil To Revit Architecture

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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AutoCAD Civil 3D :: Civil Sections Relocating Themselves Within Model Space

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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AutoCAD Civil 3D :: Use Of Colour Hatches For Civil Production Drawings?

Oct 23, 2013

Just curious as to whether people use much colour in their production drawings, particularly for hatches...?

Working for Local Government, we tend to utilise colour hatches to show all kinds of information.

Generally, we have found that colour hatches are a good way to clearly show different areas and materials such as pavements, paths, landscape areas etc. Hatches can then be used to quickly ascertain areas for estimation and our construction team like them too as the plans tend to be easier to read.

The usual arguments about reproduction of plans and slowing down of computers doesn't seem to be an issue for us. Most photocopiers are in colour now anyway and we just make sure that even in black & white the plans are readable.

The way that Civil 3D deals with hatching doesn't seem to slow things down for us either.

Currently using Civil 3D 2013 & 2014 SP1

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AutoCAD Civil 3D :: Viewing Civil Objects In Regular

Aug 30, 2012

Right now, the only way I know of being able to see Civil grading objects (surface contours, spot elevations, slopes, etc) while using plain vanilla AutoCAD is to explode everything and export to a lower version.

I'm trying out a trial of AutoCAD 2013 to test things, and my Civil drawing shows up as boxes/text when xrefed into another drawing without doing the task above.

I'm looking for a more efficient way to see grading using AutoCAD (not Civil). Civil is expensive, and I'd like to downgrade the drafters who don't know how to use the Civil functions (and never will), but still need grading to show as a dynamic xref in the background of the drawings they're working on. Problem is, if I have to explode and export my drawing every time I want to update the grading xref in their drawing, it wastes more time than I'd like.

Is this the only way and I have to live with it, or am is there an easier way that I haven't dug up yet? I know I'm not an expert at Civil, so I may be going about this all wrong.

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AutoCAD Civil 3D :: Search For A Text Style In A Civil Style?

Jun 12, 2013

Is there a way to search for a text style in a civil style? I have a text style that our company is trying to get rid of and I would very much like to not have to go through our 72 company styles.

AutoCAD Civil 3D 2014
HP Z620 Workstation 64-bit
Duel Intel Xeon E5-2620 @ 2.00 GHz
Ram: 48 GB

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AutoCAD Civil 3D :: Using STB Rather Than CTB?

Oct 26, 2012

I've begun creating my drawing template with all my layers and each layer has a plot style attached to it.  The line weight is set to default.  I am doing a test plot with a drawing that I have to see what it looks like.  The pen table is set to my .stb table but when I go to preview, my linework doesn't show up. 

I have checked my setting for my layers to make sure that they are set to plot. 

In my plot dialog box, if I uncheck "Plot with plot styles" I can see the linework but it doesn't plot right (plots in color).  Unchecking "plot object lineweights" doesn't do anything either. What am I missing? 

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AutoCAD Civil 3D :: How R Is Calculated

Jul 28, 2013

How R is calculated in the C3D?

I’m wondering regarding the equation used to calculate the radius of the circular curve. Is it the one attached? How the horizontal curve is updated as the design speed is changed?Ja

Software: AutoCAD 2014, AutoCAD C3D, AutoCAD M3D, Revit
Windows 7 (Ultimate 64 bits),
Firefox 20.0,
Kaspersky 2013.

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AutoCAD Civil 3D :: Can't Load CUI

Apr 6, 2012

To my knowledge this file has not been renamed and definitely not been deleted...Has been moved, but does that matter?  The attached image is the error i get when trying to load .cuix as a partial in CUI dialogue box.  I cannot load from CUILOAD, either.

I have verified that another cui of the same name is not already loaded.

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AutoCAD Civil 3D :: What Is Best DWG Viewer

Mar 24, 2008

We have someone who doesn't need any cad fuctionality just the ability to view dwgs and occasionally print. I got to looking and found there are various versions of free DWG viewers. What is the easiest one to use? Esp for someone who doesn't normally use cad?

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AutoCAD Civil 3D :: Publishing To PDF

Jun 19, 2013

In one file Civil 3D keeps crashing when I wan't to publish multiple layouts to pdf.

I have publish in background turned off and I am using Civil 3D 2013

When it crashes I get the following Error message:

FATAL ERROR: Unhandled Access Violation Reading 0xddadd6d8 Exception at 771d8359h

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AutoCAD Civil 3D :: Export To DXF

Feb 5, 2013

Why does Exporting to DXF (any version other than 2013) fail, every single time?

First, we always get this error during the save. The save appears to finish OK in spite of the error.

But when you try to open the DXF using DWG Trueview, we get this error.

If we export out to 2013 DXF, the resulting file can be opened, but this doesn't do us much good.

(using C3D 2013 with latest SP)

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AutoCAD Civil 3D :: Importing SDF From Hec RAS

Jan 14, 2013

I have been trying to import/export information to create a flood map using hec ras. I succesfully (not without some pain), imported the geometric data into HEC RAS and did my analysis. I create the .sdf and try to import it to Civil 3D, but, while it appears to have imported succesfully, it does not show the water lines.

As a matter of fact, CIVIL3D indicates at some point that the minimim and maximum elevations are both 0.00m.

I checked the .sdf file, which I attach, and it looks fine to me. It has the information of the water level as it should.

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AutoCAD Civil 3D :: Export To HEC RAS

Jun 27, 2013

I have AutoCAD Civil 3D 2010, and I want to export some sections to HEC RAS, but I can't find the tool that allows me to do that, how can I find it?

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AutoCAD Civil 3D :: SSA Results Not Looking Right

Dec 23, 2013

I performed an analysis on a system, but when I play the video some of the pipe segments the water line jumps back and forth angling in different directions.  Some of the pipes get full and then the water line just drops down to the bottom.  I also cannot get the pipes to drain at the end, I tried running the analysis for a long time span and it just sits at the point that it wants.

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