July 23, 2010 The download named "Data4NogalesLandUse.zip" is a Zipped data folder containing GIS files associated with the publication: Norman, L.M., Villarreal, M.L., Wallace, C.S.A., Gil Anaya, C.Z., Diaz Arcos, Israel and Gray, Floyd, 2010, A high-resolution land-use map—Nogales, Sonora, Mexico: U.S. Geological Survey Open-File Report 2010-1156, 24 p. [http://pubs.usgs.gov/of/2010/1156/]. ____________________________________________________________________ "nogsonlanduse" is the Raster GRID that is classified land cover for the Nogales, Sonora watershed. "Nogales_SonWatershed" is the shapefile of the watershed boundary "H20shedOutlet" is the shapefile with the pourpoint associated with the watershed derived for this research Metadata describing the landuse GRID is available in the manuscript cited above. Laura M. Norman, PhD U.S. Geological Survey, Western Geographic Science Center 520 N. Park Avenue, Suite #102K, Tucson, AZ 85719-5035 Phone: (520) 670-5510; Fax: (520) 670-5113; lnorman@usgs.gov