[GRASS-user] Processing LiDAR data in GRASS GIS

Adrian Kirilov kirilov.adrian at gmail.com
Sat May 4 12:01:28 PDT 2013

     Hello Hamish and Mark,

     This way is a lot more easy! Probably it would take me a lot of time
to find it myself :-)

     Thank you for the help and keep doing the good job for GRASS and the


     Adrian Kirilov

On Thu, May 2, 2013 at 11:57 PM, Hamish <hamish_b at yahoo.com> wrote:

> Adrian wrote:
> > I have LiDAR data in ASCII txt files with only X, Y and Z
> > coordinates, which I want to import and create DEM models
> > from in GRASS. I'm new to this kind of data processing.
> --> see  http://grass.osgeo.org/wiki/LIDAR
> r.in.xyz + r.surf.nnbathy is my favorite combo for this, but
> then, I'm biased. 3.5M points should run in a few seconds.
> (r.surf.nnbathy from the wiki AddOns page)
> The choice between v.in.ascii and r.in.xyz really depends on if
> you want to do full analysis on the point cloud or just make a
> fast DEM from an already cleaned x,y,z set.
> 3.5M points is on the limit of the number of vector points you
> can work with in GRASS 6 with full topology and database tables
> unless you have a computer with lots of RAM. (thus options to
> disable first database creation and second topology)
> Hamish
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