Hi Moritz,
Moritz Lennert wrote > 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 ? maybe related, in the addon v.habitat.dem I calculate e.g. geomorphons: absolute area of flat, summit, ridge, shoulder, spur, slope, hollow, footslope, valley, depression per polygon it's around [1] [1] https://trac.osgeo.org/grass/browser/grass-addons/grass7/vector/v.habitat.dem/v.habitat.dem.py#L412 ----- best regards Helmut -- Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Dev-f3991897.html _______________________________________________ grass-dev mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-dev
