Hi! Will this approach enable a correction for terrain as well? I don't see how I can incorporate elevation data or anything relevant.
I used the cosine correction approach which is described in GRASS-GIS in order to correct a MODIS image. But the result is over-corrected (!) as mentioned also in the book. I am looking for a practical approach in order to minimize terrain effects in a MODIS NIR surface reflectance acquisition. The area in which I am interested to visually identify the land cover, is mountainous. So any correction would be of great importance. Thank you in advance. On Fri, 2007-11-30 at 15:10 -0800, Hamish wrote: > Nikos Alexandris wrote: > > I tried to follow the example for correction of terrain effects in a MODIS > > surface reflectance NIR band > > (...as far as I know, MODIS surface reflectance imagery is only corrected > > for atmospheric effects). > > > > I don't get the desired results... The output is too bright from what one > > would expect it to be. > > > > Any recommendations? > > I've never used it for MODIS, but you could try i.landsat.rgb to see if that > helps. (it wants three 0-255 bands, it doesn't care about it being LANDSAT or > not) > > > Hamish > > > > > ____________________________________________________________________________________ > Never miss a thing. Make Yahoo your home page. > http://www.yahoo.com/r/hs -- Nikos Alexandris . Department of Remote Sensing & Landscape Information Systems Faculty of Forestry & Environmental Sciences, Albert-Ludwigs-University Freiburg . Tel. +49 (0) 761 203 3697 / Fax. +49 (0) 761 203 3701 / Skype: Nikos.Alexandris . Address: Tennenbacher str. 4, D-79106 Freiburg i. Br., Germany
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