What is the best way to import SDTS format USGS DEMs into GRASS? Thanks in advance, G. Vance Justice, Jr. Hydrologist USDA-ARS National Sedimentation Laboratory 598 McElroy Dr. Oxford, MS 38655 Phone: 601-232-2990 FAX: 601-232-2915 E-mail: justice at sedlab.olemiss.edu