Hi, reading the training material here: http://training.gismentors.eu/grass-gis-irsae-winter-course-2018/units/23.html I have a doubt. When cloud mask is applied to calculate NDVI
t.rast.mapcalc input=b4,b8,cloud output=ndvi_cloud \expression="if(isnull(cloud), null(), float(b8 - b4) / ( b8 + b4 ))" \basename=ndvi_cloud nproc=3 what happens if there is no cloud mask at all for a certain map? In this case NDVI should be taken as is. Instead, to my understanding, what happens: if(isnull(cloud), null() If cloud map is not found (meaning there is no cloud detected), isnull(cloud)=True, so the NDVI resulting map is null too. Please correct me if I'm wrong. Thanks -- Margherita Di Leo
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