Huub Munstege wrote: [...]
> But as you already noticed the bands and ranges have changed under Landsat > 8. Various combinations of bands (4,5 and 8) give a result that is at best > not so clear cut as the analysis done with L-7. The "bluntly subtraction > with 0.12" is based on on a quick scan of the obtained result. Areas > without vegetation in our project area should give values in the range > between -0.05 - 0. The result of the combination of the 5 and 4 bands in > the above formula gives values that are aprroximately 0.12 higher. > Therefore the blunt and in-elegant subtraction which is definitely wrong. > But it gives us for the time being a better deistinction between cultivated > irrigation schemes and their surroundings. Maybe I am simply too impatient > and too eager to work with the new fresh data from L-8. Undoubtedly soon, > Grass and the other software will incorporate specific modules that will be > tailored to the L-8 sensors. Dear Huub, did you eventually progress regarding the VI from L8 images? Any findings you could share? Thanks, Nikos _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
