Hello List, Newbie questions - I'm looking for documentation on how to use FWTools to... (1) convert an ECW raster to an indexed set of tiled TIFs? (2) convert a 1.5Gb TIF with an external 'tfw' file to a set of tiled TIF's? (3) crop the 1.5Gb TIF with external 'tfw' file and convert to a GeoTIFF Thank you for any assistance. Eric