On Tue, Feb 17, 2015 at 4:49 PM, Margherita Di Leo <direg...@gmail.com> wrote:
> Hi,
>
> I have a vector of points. According to a regular grid, I need to (randomly)
> sample a certain number n of these points in each cell of the grid. Such
> number n is given in a column of the attribute table of the grid. How would
> you do this?
With a small script this should be doable:
- generate the grid as polygons (v.mkgrid)
- loop over each polygon
- fetch category number or v.extract
- fetch corresponding number of points to be created from DB
- v.random, using the current grid polygon for restricted creation feature
http://grass.osgeo.org/grass70/manuals/v.random.html#restriction-to-vector-areas
- save point map
- patch all point maps into single resulting map
- remove single point maps
Something like this...
Markus
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