[GRASS-user] count pixels by attribute in sampling units

[Patrick Giraudoux]

Dear listers,

I am exploring r.le and r.li, but I am afraid those two sets of 
programmes are providing what I need only partly. Before using them for 
shape and diversity analysis, I just would like to get the number of 
pixels (or the area) by attributes types (eg the attribute is a class of 
CORINE landcover or any classified image) in each sampling unit into a 
text file. Sampling units would be circles of a given radius centered 
over sites (overlayed on the raste to analyse). I can provide either a 
vector file with the center points or imported polygon shapefiles. 
Surprisingly it seems that this simple statistics is not provided in 
r.le (maybe wrong ?). I suppose this may be due to the fact there is a 
much more simple way to do it in GRASS, but cannot find it in Neteler 
and Mitasova book.

Any hint welcome,

Patrick