AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

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kevin.barnett
Posts: 391
Registered: ‎08-13-2007
Message 1 of 6 (1,343 Views)
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Maximum number of points in a C3D 2013 surface? 1.5 mill?

1343 Views, 5 Replies
05-04-2012 12:15 AM

C3D 2013. 64 bit. Windows 7.

 

Question 1.

In C3D 2013 is there a ceiling to the number of points allowable in a C3D surface? Is it 1.5 million?

 

Question 2.

In C3D 2013, when creating a surface from Point Cloud data is there a maximum point count based on the answer to question 1 - or is a different point count limit applied?

 

Thx.

Kevin.

 

Number of points 17 143 972, read from a text file.  The text file size ± 560mb.

 

 Surface Propeties.png


kevin.barnett wrote:

 

Question 2.

In C3D 2013, when creating a surface from Point Cloud data is there a maximum point count based on the answer to question 1 - or is a different point count limit applied?

 

 


From the 2013 help file: 

  1. Note

    The displayed value is the percentage of 1.5 million points, which is the maximum number of points that can exist in a drawing, regardless of the number of point clouds in the drawing.  

Althougth I can't find it in the help files right now, the surface will be created based on the points that are being displayed in the cloud. In other words, I have 3 million points in my point cloud. I've set the slider to the max so 1.5 million points are being displayed. I then stylize the point cloud so only the ground shots are displayed (I'll assume that's 50% of them) so we are now down to 750k points. I then draw a rectangle around a quarter of the point cloud to add those points to my surface so you are now down to around 190k points.

 

Hope that makes sense.

Active Contributor
Wilbers2013
Posts: 39
Registered: ‎10-14-2008
Message 2 of 6 (1,319 Views)

Re: Maximum number of points in a C3D 2013 surface? 1.5 mill?

05-04-2012 06:57 AM in reply to: kevin.barnett

Number of points 17 143 972, read from a text file.  The text file size ± 560mb.

 

 Surface Propeties.png

Willie Wilbers
AutoCAD & Civil 3D 2014
ArcGIS 10.1
*Expert Elite*
mathewk
Posts: 2,756
Registered: ‎07-09-2003
Message 3 of 6 (1,313 Views)

Re: Maximum number of points in a C3D 2013 surface? 1.5 mill?

05-04-2012 07:15 AM in reply to: kevin.barnett
Willie, is that the maximum number of points C3D can accomodate or is that just a surface you made? I don't think C3D has a limit per-se.

Regarding point clouds, I think there is a 1.5M point limit but I can't find any documentation to back that up.

For normal surfaces larger than that, C3D writes out to an external MMS file.
Matt Kolberg
Cansel - Autodesk Division
http://www.cansel.ca/
Active Contributor
Wilbers2013
Posts: 39
Registered: ‎10-14-2008
Message 4 of 6 (1,308 Views)

Re: Maximum number of points in a C3D 2013 surface? 1.5 mill?

05-04-2012 07:52 AM in reply to: mathewk

The surface was created from a file we received from a municipality and C3D writes a mms file.  Tha file took about 25min to load.  But afterthat, it worked quit fine.

 

I am not sure about the maximum amount of points that C3D can handle.

 

Have  a look at one one of the Autodesk University classes on point files.  It describes the way C3D handles Point Clouds in detail.

 

http://au.autodesk.com/?nd=class_listing&filter_keywords=point&chunk=15&filter_track=&filter_softwar...

Willie Wilbers
AutoCAD & Civil 3D 2014
ArcGIS 10.1
*Expert Elite*
Sinc
Posts: 6,207
Registered: ‎11-18-2006
Message 5 of 6 (1,295 Views)

Re: Maximum number of points in a C3D 2013 surface? 1.5 mill?

05-04-2012 12:14 PM in reply to: kevin.barnett

We use Trimble Real Works to process our point cloud data.  We find the tools in that software are FAR superior to C3D's abilities.  (Don't have any experience with other scanners than Trimble, but suspect you may find something similar.)

 

So we use TRW to "prune" our point cloud data down to a reasonable level, then only import that smaller set of data into C3D.  We find that works much better.

Sinc
*Expert Elite*
BrianHailey
Posts: 2,819
Registered: ‎04-27-2005
Message 6 of 6 (1,274 Views)

Re: Maximum number of points in a C3D 2013 surface? 1.5 mill?

05-04-2012 03:50 PM in reply to: kevin.barnett

kevin.barnett wrote:

 

Question 2.

In C3D 2013, when creating a surface from Point Cloud data is there a maximum point count based on the answer to question 1 - or is a different point count limit applied?

 

 


From the 2013 help file: 

  1. Note

    The displayed value is the percentage of 1.5 million points, which is the maximum number of points that can exist in a drawing, regardless of the number of point clouds in the drawing.  

Althougth I can't find it in the help files right now, the surface will be created based on the points that are being displayed in the cloud. In other words, I have 3 million points in my point cloud. I've set the slider to the max so 1.5 million points are being displayed. I then stylize the point cloud so only the ground shots are displayed (I'll assume that's 50% of them) so we are now down to 750k points. I then draw a rectangle around a quarter of the point cloud to add those points to my surface so you are now down to around 190k points.

 

Hope that makes sense.

Brian Hailey
CAD-1.com
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