I need to implement viewshed analysis and the only available data is SRTM 90m Dem. Is that DEM suitable for viewshed analysis? Thank you, Leonidas -- View this message in context: http://www.nabble.com/SRTM-DEM-and-Viewshed-Analysis-tp17148430p17148430.html Sent from the Grass - PKG - General mailing list archive at Nabble.com.