[GRASS-user] Re: Re: some interesting tools for working with LAS format

[Gerald Nelson]

At a minimum, this description would be good to add to the grass FAQ.

---- Original message ----
>Date: Wed, 11 Jul 2007 15:11:31 +0200
>From: Bernhard Reimar Hoefle <Bernhard.Hoefle at uibk.ac.at>  
>Subject: [GRASS-user] Re: Re: some interesting tools for working with LAS format  
>To: grassuser at grass.itc.it
>
>Hi!
>Thanks to Hamish we can now easily convert LAS files to DEMs with r.in.xyz.
>
>To remind, LAS Tools can be found here:
>http://www.cs.unc.edu/~isenburg/lastools/
>
>I successfully compiled and used it like this:
>
>1)
>in las2txt.cpp (lastools/tools/src): change main to return int:
>int main(int argc, char *argv[])
>
>2)
>g++ ../../src/lasreader.cpp las2txt.cpp -I ../../inc/ -o las2txt
>-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
>
>3)
>./las2txt test.las -otxt | r.in.xyz input=- output=dtm method=min fs=" "
>
>
>> As a start we can include references to the LAS tools in the relevant man
>> pages and wiki, with build and useage examples. This would get new users up
>> to speed on the 'toolchain' approach to processing data with GRASS+external
>> tools.
>
>We should definitely do that.
>
>> While this is always an option, I think that by generalizing things a bit
>> further (via a GDAL/ogr driver) or using the LAS tools as a pre-processing
>> step would be the best way forward.
>
>I absolutely agree with you. But don't know how complicated this implementation
>will be and I'm not a programmer, so I cannot really support.
>
>Bernhard
>
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Gerald Nelson
Professor, Dept. of Agricultural and Consumer Economics
University of Illinois, Urbana-Champaign
office: 217-333-6465 
cell: 217-390-7888
315 Mumford Hall
1301 W. Gregory
Urbana, IL 61801