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

[Andreas Neumann]

 Hi,

 Probably something for the LAStools?

 See http://www.cs.unc.edu/~isenburg/lastools/

 Andreas

 On Mon, 19 Nov 2012 12:40:50 +0100, Olav Peeters wrote:
> Hi everyone,
> for the purpose of speeding up a complex interpolation (written in
> single core Fortran-code) we would want to split a cloud of points
> (ca. 3 million irregular points) into X number of parts (eg 20 parts
> of more or less 150 000 points). Does anyone know of some
> QGIS-extension that could do this kind of a job? 
>
> I was looking at a Saga-gis module ("Shapes - Tools > Split Shapes
> Layer Randomly") in the SEXTANTE toolbox. This is perfect if you want
> to split shapes into two parts with varying proportions between the
> two parts. I can perform this sequentially to arrive at the desired
> number of parts, but is very time consuming if you want to compare 
> the
> impact on the system of splitting everything in eg 20 parts versus 15
> or 12 or..
>
> Preferably, a solution should be executable from the command-line.
>
> Cheers,
> Olav

-- 
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 Andreas Neumann
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 Switzerland