dn2nbr (short for Digital Numbers to Normalized Burn Ratio) is a script designed to work in GRASS GIS to calculate the NBR from a Landsat 7 image with Digital Numbers values. Obtaining a NBR image is a tedious task in GRASS since bands 4 and 7 of the scene have to be converted to radiance and reflectance values (using gap masks if necessary) prior to calculating the NBR itself, so this script was created to simplify the process. 2 new images will be created from the inputs with the radiance and reflectance values, each output will have the same name of the input along with the "_RAD" and "_REF" suffix respectively. The final NBR image's name will be specified by the user.
More information can be found in the wiki!
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