Something is fishy here, reflectance values should always be within 0-1 range.
Please manually remove all values outside of that range (use r.mapcalc) and make a histogram of your TOAR band. if the histogram is of expected shape, and is not truncated at 1.0 threshold then you are OK. if there is a problem here, that means the TOAR processing had an issue. Stretching output from an unknown histogram skewness could be giving you funny results. On Mon, Jun 15, 2015 at 6:47 PM Micha Silver <[email protected]> wrote: > On 6/15/2015 3:25 PM, John, Lisa wrote: > > Hi Micha, > > did you refer to the input range? > > Yes, the input range. > > I did so and checked bands 1-9 with r.info -r. Top of atmosphere > reflectance values are all in the range of -0.01 - 2.12. The negative value > seems to be a outlier and I check in addition with the range 0-2.12. > I used these values for the input range in i.atcorr -r and used 0,1 as > output range. > > I meant in the first i.landsat.toar step. The input (DN) values should be > up to 700 or so. Landsat 8, with its 12 bit data can have max DN values of > 4096. But I didn't use that full range, rather the actual DN range of the > original images. > > > However I get even smaller reflectance values (0.15 respectively 0.29 for > vegetation in band5) > > Regards, Lisa. > > > This mail was received via Mail-SeCure System. > > > _______________________________________________ > grass-user mailing > [email protected]http://lists.osgeo.org/mailman/listinfo/grass-user > > > This mail was received via Mail-SeCure System. > > > > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user
_______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
