The rpv libraries are collections of spectral BRDFs of different surface types, This option must be used either with surface_type or surface_type_map, in order to select the specific surface type.

For using a rpv_library write

rpv_library library_path
where library_path is the path of the directory, where the BRDF data is stored. The files are expected to have the names IGBP.01.rpv, IGBP.02.rpv, ... If surface_type 1 is specified the BRDF from IGBP.01.rpv will be used, and so on. Each file must have the structure like an rpv_file. (This option is quite the same as rpv_file, except that it offers you an easy way to use the option surface_type_map in combinition with your rpv_files.)

rpv_library IGBP
The built-in library contains the first 17 surface types see albedo_library. The data is given for the wavelengths 443nm, 565nm, 670nm, and 865nm. Stay near this wavelength in order to get reasonable results. In future this the rpv-library will be NDVI dependent, but until now the most common NDVI class is selected automatically.





Arve Kylling 2010-03-10