Рељеф — разлика између измена

Landforms may be extracted from a [[digital elevation model]] using some automated techniques where the data has been gathered by modern satellites and [[stereoscopic]] [[aerial photography|aerial surveillance]] cameras.<ref>{{cite web|url=http://www.colorado.edu/research/cires/banff/pubpapers/198/ |title=Conference paper: "Automated landform classification using DEMs"|accessdate=2008-06-26. 6. 2008|author1=Robert A. MacMillan |author2=David H. McNabb |author3=R. Keith Jones |date=September 2000}}</ref> Until recently, compiling the data found in such data sets required time consuming and expensive techniques involving many man-hours. The most detailed DEMs available are measured directly using [[LIDAR]] techniques.