[Qgis-user] split point cloud into X randomly selected (equally sized) parts

[opeeters]

Great blog, Victor!
Thank you!

Well actually, a colleague came up with a very simple python script (see
attachted splitgrid.py
<http://osgeo-org.1560.n6.nabble.com/file/n5018501/splitgrid.py>  ). This is
no spatial randomisation like eg the v.kcv function in GRASS GIS, but for
large enough datasets, it delivers wonderfully fast and with a good spatial
spread. Feel free to add it to your blog if you see any added value.

Thanks Andreas,
for pointing me to the LAStools! I did not know about them yet and yes, even
if we are not doing LiDAR, these tools are superb in crunching big amounts
of numbers. I contacted Martin Isenburg concerning a license for using
las2dem or blast2dem. His response left me a bit shell shocked. I don't know
the guy well enough I guess. But still, everyone has bills to pay. We would
have the funds to reward him handsomely for his efforts in the project we
would like to use this application in. But I'm sorry, I really cannot
endorse the way he is going commercial now.

Thanks paulo25,
for pointing my to the v.kcv function in GRASS GIS.
I tried is through the SEXTANTE toolbox, but with 3 million points, I guess
this algorithm gets clotted. I tried it on a machine with plenty of RAM and
CPU. The process just dies after some time. But for larger data sets a
spatial randomisation is not so important as for smaller ones...

Thanks again to you three!

Regards,
Olav







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