Dear list, I am working on 50m resolution DEM making analysis on 1 km radius area, in order to find local minimum. To begin, I used r.neighbor with a circular mask , size 41 pixel. I repeated a similar analysis (adding another filter) parsing r.univar on each 1km buffer around each pixel (using r.mask)
Just for the sake of precision, I also tested my routine not considering the added filter and I notice a few cases where the two results slightly differ, probably due a difference between r.neighbor circular mask and r.buffer output used as mask: as you can see in the attached image, the blue pixel is the minimum using buffer, the red one using r.neighbor Does it make sense? or the two analysis should return the same result as the two masks should have the same shape? Enrico
<<attachment: buffer.png>>
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