[R-sig-Geo] Methods for working with LIDAR data

Dylan Beaudette debeaudette at ucdavis.edu
Wed Jul 28 20:14:13 CEST 2010

On Wednesday 28 July 2010, Waichler, Scott R wrote:
> I have a text file with x, y, z data from a LIDAR survey.  Can someone
> suggest a method to use to derive a Spatial Pixels or Spatial Grid object
> from these?  The spacing is not exactly regular of course.  The data are
> dense over all of the domain except for some blank areas, which I would
> like to designate as NA.
> I am open to using most packages and functions, but don't want to use
> Scott

Any particular reason not to use GRASS? In most cases it will scale to very 
large point datasets very nicely. Specifically, see the module r.in.xyz 


From the manual page:
"r.in.xyz is designed for processing massive point cloud datasets, for example 
raw LIDAR or sidescan sonar swath data. It has been tested with datasets as 
large as 14.5 billion points (379GB)."

Some more information from the GRASS Wiki:


Dylan Beaudette
Soil Resource Laboratory
University of California at Davis

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