[GRASS-dev] module for collecting percentages of raster classes in a vector map

[Veronica Andreo]

El lun., 2 jul. 2018 13:21, Moritz Lennert <mlennert at club.worldonline.be>
escribió:

> Hi everyone,
>
> I have a vague memory that someone has coded this before, but cannot
> find it anywhere, but before I code it myself I wanted to know if my
> vague memory actually was right: I need a module that takes a
> qualitative raster map (e.g. land cover map) and a vector polygon map
> and calculates the share of each raster class in each vector polygon.
> This just means looping of the raster categories, create a reclass map
> for each category (category = 1 and rest=null) and then use r.univar to
> calculate non_null_cells/(non_null_cells+null_cells), so it's fairly
> easy to code, but even so, does anyone know if something like this
> already exists, before I reinvent the wheel ?
>

This would be super nice to have ;)

Vero
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