HI, How to do image rationing between two bands 5/2 of landsat in grass. I used this command ( r.mapcalc "ratio5_2=1.0*p126r046_7t20010929_z48_nn50/p126r046_7t20010929_z48_nn20" d.erase d.rast ratio5_2) but it doesn't work -- *The successful revolutionary is a statesman, the unsuccessful one a criminal <http://www.brainyquote.com/quotes/quotes/e/erichfromm100031.html>.
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