1994. U.S. Geological Survey. This shapefile contains the boundaries of the 8-digit watersheds that intersect New York State. These hydrologic unit boundaries provide a uniquel...
1979. U.S. Geological Survey. The DLG data files used to create this dataset are derived from the 1:2,000,000-scale maps contain selected base categories of cartographic data in...
1999. U.S. Geological Survey. The data set portrays the polygon and line water features of New York State. The file was produced by joining the individual State hydrography laye...
1999. U.S. Geological Survey. This map layer includes the locations of over 500 majors dams in New York State. The information in the map layer was provided by the U.S. Army Cor...
1994. U.S. Geological Survey. This data set shows the 1991 and 1994 National Water-Quality Assessment (NAWQA) study units' major surface-water sampling sites. These sites are in...