The REF file extension is used to signify signature files in the Ad-Aware anti-spyware computer security software application. REF signature files are not intended for editing. The REF file extension is also used to refer to reference files in various applications.
File created by IDRISI Taiga, a GIS imaging application; stores geographic reference information so that .RST images can be projected according to specific unit measurements; can be used for multiple raster images. Many preinstalled REF files are located in the \GEOREF\ directory of the IDRISI Taiga installation.