[pdal] OSGeo4W64 PDAL 1.5 now available

[Bradley Chambers]

>
> > On May 22, 2017, at 12:11 PM, Riivo Kolka <riivo.kolka at gmail.com> wrote:
>
> > Is Poisson sampling much slower than other methods or not?
>

In short, Poisson (aka, filters.sample) will be slowest, in part due to
initial KD-tree construction and subsequent queries. VoxelGrid is faster
than Poisson sampling, as it only needs to voxelize the data. Decimation is
fastest, as it only considers point order.

I'll leave it up to you to benchmark the different methods for your
particular data.

Brad
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