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

[Bernhard Reimar Hoefle]

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