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 :: 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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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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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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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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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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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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Nov 12, 2013

When I use ImportSubassembly API to import my subassembly created by Autodesk Subassembly Composer  into my civil project, it reports error-"eFilerError".

the code like this:

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itemId = "ab660722-c69d-4ade-b373-0e9f99c94e55";
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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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Mar 3, 2013

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Civil 3D 2012 SP4.0 Windows 7 Enterprise 64-bit
C3D 2014 SP1
Dell M6600, Core i7 @ 2.3GHz, 16 GB ram
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