[GRASS-dev] Random selection of a given number of points/pixels per class

[Anna Petrášová]

r.sample.category in addons seems like what you want?

On Fri, Aug 30, 2019 at 3:59 AM Stefan Blumentrath <
Stefan.Blumentrath at nina.no> wrote:

> Dear devs,
>
>
>
> Recently, I was trying to generate a fixed number of random points per
> class in a vector or raster map.
>
>
>
> So I looked at both v.random and r.random. However, neither seemed to give
> me the desired result:
>
> v.random with restrict option seems to generate points per area even if
> areas belong to the same class and share the same cat value.
>
> r.random does not have a restrict option.
>
>
>
> So I ended up writing a small script that basically loops over the classes
> and extracts n points/pixels per class from a input raster map. My question
> now is did I overlook some less obvious feature of v.random or r.random?
>
> If not I might create a small wrapper addon…
>
>
>
> Cheers
>
> Stefan
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