importing a .las pointcloud

Replies to This Discussion

Permalink Reply by David Rutten on November 30, 2013 at 8:34am

Can you post a link to whatever online document describes the LAS file format?

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David Rutten

david@mcneel.com

Permalink Reply by Ángel Linares on December 2, 2013 at 6:50am

Mmm...I don't know if this could help you a little bit :)

http://civil3dguru.blogspot.com.es/2012/12/pointclouds-in-civil-3d....

And this is general information about the LAS file format: http://www.asprs.org/Committee-General/LASer-LAS-File-Format-Exchan...

Permalink Reply by Pirouz Nourian on December 3, 2013 at 4:51am

Thanks Angel, this was insightful! :)

Permalink Reply by Pirouz Nourian on December 3, 2013 at 4:48am

Hi David,

They are described here: http://www.asprs.org/Committee-General/LASer-LAS-File-Format-Exchan...

As far as I know, a point cloud in this format could contain xyz coordinates, RGB colors and an intensity values. 

BTW, are there functions for point cloud segmentation and classification somewhere in Rhino or Grasshopper namespaces? I wonder how I could efficiently insert point cloud items using this from a .las file for instance (I don't know if this is the best way of doing it):

http://4.rhino3d.com/5/rhinocommon/html/T_Rhino_Geometry_PointCloud...

Thanks for your support,

Pirouz

Permalink Reply by David Rutten on December 3, 2013 at 6:01am

Grasshopper doesn't support point-clouds at all. There is also no native support for per-object colours. If you use the [Custom Preview] component for this then the performance will be terrible. Orders of magnitude slower than native Rhino pointclouds.

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David Rutten

david@mcneel.com