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101. Chesapeake Watershed Land Cover, Madison County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
102. Chesapeake Watershed Land Cover, Oneida County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
103. Chesapeake Watershed Land Cover, Onondaga County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
104. Chesapeake Watershed Land Cover, Ontario County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
105. Chesapeake Watershed Land Cover, Otsego County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
106. Chesapeake Watershed Land Cover, Schoharie County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
107. Chesapeake Watershed Land Cover, Schuyler County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
108. Chesapeake Watershed Land Cover, Steuben County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
109. Chesapeake Watershed Land Cover, Tioga County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
110. Chesapeake Watershed Land Cover, Tompkins County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
111. Chesapeake Watershed Land Cover, Yates County NY, 2013-2014
2014. Chesapeake Conservancy. This 1-meter resolution raster dataset was developed as part of the Land Cover Project, a cooperative agreement between the Chesapeake Conservancy ...
112. Construction Minerals Operations, New York State, 2001
2001. U.S. Geological Survey. This data set includes construction minerals operations in the United States. The data represent commodities covered by the Minerals Information Te...
113. Counties with Demographics, New York, 2000
2000. U.S. Department of Commerce U.S. Census Bureau Geography Division. CUGIR, the Cornell University Geospatial Information Repository, using US Department of Commerce, Bureau of the Census data, developed the GIS data...
114. Counties with Demographics, New York State, 2000
2000. U.S. Department of Commerce. Census Bureau. Geography Division. This dataset presents boundaries and basic demographic data from the 2000 Census for each county and county-equivalent area in New York state. For...
115. Cover Type Wetlands Map of the Oswegatchie-Black, Upper Hudson, and St. Regis Watersheds in New York State, 2000
1997. New York State Adirondack Park Agency and Daniel M. Spada, Project Director (compiler). A set of 18 USGS 7.5' quadrangle-based wetland coverages was prepared for the Oswegatchie-Black, Upper Hudson, and St. Regis River watersheds, prim...
116. Critical Environmental Areas, Tompkins County NY, 2000
1999. Tompkins County Planning Department, Town of Ithaca. Polygons delineating the boundary of Tompkins County Critical Environmental Areas. Currently, Coy Glen, located in the Town of Ithaca, is the only ...
117. Cropland Data Layer, New York, 2010
2010. United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS), Research and Development Division (RDD), Geospatial Information Branch (GIB), Spatial Analysis Research Section (SARS). The USDA, NASS Cropland Data Layer (CDL) is a raster, geo-referenced, crop-specific land cover data layer. The 2010 CDL has a ground resolution of ...
118. Cropland Data Layer, New York State, 2002
2002. United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS), Research and Development Division, Geospatial Information Branch, Spatial Analysis Research Section (SARS). The USDA-NASS 2002 New York Cropland Data Layer (CDL) is a raster, geo-referenced, categorized land cover data layer produced using satellite image...
119. Cropland Data Layer, New York State, 2008
2008. United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS), Research and Development Division (RDD), Geospatial Information Branch (GIB), Spatial Analysis Research Section (SARS). The USDA, NASS Cropland Data Layer (CDL) is a raster, geo-referenced, crop-specific land cover data layer with a ground resolution of 56 meters. Th...
120. Cropland Data Layer, New York State, 2009
2009. United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS), Research and Development Division (RDD), Geospatial Information Branch (GIB), Spatial Analysis Research Section (SARS). The USDA, NASS Cropland Data Layer (CDL) is a raster, geo-referenced, crop-specific land cover data layer with a ground resolution of 56 meters. Th...
121. Crushed Stone Operations, New York State, 1998
1998. Minerals Information Team, U.S. Geological Survey. This data set includes crushed stone operations in the United States. These data were obtained from information reported voluntarily to the USGS by...
122. Election Districts, Tompkins County NY, 2000
2000. Ithaca-Tompkins County Transportation Council, Tompkins County ITS GIS Geography Division. This shapefile is an extract of selected geographic and cartographic information about Tompkins County Election Districts. To help.
123. Election Districts, Tompkins County NY, 2002
2002. Tompkins County ITS GIS Division, Tompkins County Assessment Department. Election districts determine representation in local, county, state, and national governments. Election District 2002 data set reflects the redis...
124. Election Districts, Tompkins County NY, 2005
2005. Tompkins County ITS: GIS Division and Tompkins County Board of Elections. Local, county, state, and national 2005 election district boundaries in Tompkins County, New York. Election districts determine representation in ...
125. Election Districts, Tompkins County NY, 2006
2006. Tompkins County ITS: GIS Division and Tompkins County Board of Elections. Local, county, state, and national 2006 election district boundaries in Tompkins County, New York. Election districts determine representation in ...
126. Election Districts, Tompkins County NY, 2013
2013. Tompkins County ITS GIS Division. Local, county, state, and national 2013-2014 election district boundaries in Tompkins County, New York. Election districts determine representatio...
127. Euphorbia esula, Leafy Spurge, New York State, 2000
1995. U.S. Department of Agriculture, Natural Resources Conservation Service. Leafy spurge is considered an invasive species which displaces native vegetation in prairie habitats and fields. This data set portrays the county-...
128. Ferrous Metal Processing Plants, New York State, 1997
1997. U.S. Geological Survey. This data set includes ferrous metal processing plants in the United States. The data represent commodities covered by the Minerals Information Tea...
129. Freshwater Wetlands, Adirondack Park, 2000
2000. New York State Adirondack Park Agency. Regulatory wetlands as depicted on maps pursuant to Article 24 of the Environmental conservation law. Data set includes in-Park portions of Clinton...
130. Geology, New York State, 1974
1994. Schruben, Arndt, and Bawiec. This dataset is a digital representation of the King and Beikman map. In 1974 the U.S. Geological Survey published a new Geologic Map of the United...
131. Great Lakes Stream Basins, New York State, 1994
1994. New York Cornell University Aquatic Ecology group. This dataset provides polygon coverage of the basins in the Great Lakes tributary watersheds of New York state, except for the Genesee, Black, Salm...
132. Historical Land Cover, LOBP eastern sites (Sandy Pond), 1938
1938. Lake Ontario Biocomplexity Project. This shapefile contains polygons representing the historical land cover within the watersheds near Sandy Pond, in New York, on the eastern shore of...
133. Historical Land Cover, LOBP eastern sites (Sandy Pond), 1955
1955. Lake Ontario Biocomplexity Project. This shapefile contains polygons representing the historical land cover within the watersheds near Sandy Pond, in New York, on the eastern shore of...
134. Historical Land Cover, LOBP eastern sites (Sandy Pond), 1975
1975. Lake Ontario Biocomplexity Project. This shapefile contains polygons representing the historical land cover within the watersheds near Sandy Pond, in New York, on the eastern shore of...
135. Historical Land Cover, LOBP eastern sites (Sandy Pond), 1995
1995. Lake Ontario Biocomplexity Project. This shapefile contains polygons representing the historical land cover within the watersheds near Sandy Pond, in New York, on the eastern shore of...
136. Historical Land Cover, LOBP western sites (Fair Haven), 1938
1938. Lake Ontario Biocomplexity Project. This shapefile contains polygons representing the historical land cover within the watersheds near Fair Haven, New York, on the southeastern shore ...
137. Historical Land Cover, LOBP western sites (Fair Haven), 1954
1954. Lake Ontario Biocomplexity Project. This shapefile contains polygons representing the historical land cover within the watersheds near Fair Haven, New York, on the southeastern shore ...
138. Historical Land Cover, LOBP western sites (Fair Haven), 1973
1973. Lake Ontario Biocomplexity Project. This shapefile contains polygons representing the historical land cover within the watersheds near Fair Haven, New York, on the southeastern shore ...
139. Historical Land Cover, LOBP western sites (Fair Haven), 1988
1988. Lake Ontario Biocomplexity Project. This shapefile contains polygons representing the historical land cover within the watersheds near Fair Haven, New York, on the southeastern shore ...
140. Historical Land Cover, LOBP western sites (Fair Haven), 2000
2000. Lake Ontario Biocomplexity Project. This shapefile contains polygons representing the historical land cover within the watersheds near Fair Haven, New York, on the southeastern shore ...
141. Hudson River Valley Gap Analysis 30m Land Cover
1993. Hudson River Estuary Program (HREP). This land cover data of the Hudson River Valley (New York) has a 30m pixel resolution, and was derived from Landsat-5 satellite imagery from 1992 a...
142. Hydrography Network, Ausable sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
143. Hydrography Network, Black sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
144. Hydrography Network, Bronx sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
145. Hydrography Network, Buffalo-Eighteenmile sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
146. Hydrography Network, Cattaraugus sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
147. Hydrography Network, Chaumont-Perch sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
148. Hydrography Network, Chautauqua-Conneaut sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
149. Hydrography Network, Chemung sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
150. Hydrography Network, Chenango sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
151. Hydrography Network, Conewango sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
152. Hydrography Network, East Branch Delaware sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
153. Hydrography Network, English-Salmon sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
154. Hydrography Network, French sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
155. Hydrography Network, Grass sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
156. Hydrography Network, Great Chazy-Saranac sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
157. Hydrography Network, Hackensack-Passaic sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
158. Hydrography Network, Housatonic sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
159. Hydrography Network, Hudson-Hoosic sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
160. Hydrography Network, Hudson-Wappinger sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
161. Hydrography Network, Indian sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
162. Hydrography Network, Irondequoit-Ninemile sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
163. Hydrography Network, Lake George sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
164. Hydrography Network, Lower Genesee sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
165. Hydrography Network, Lower Hudson sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
166. Hydrography Network, Middle Delaware-Mongaup-Brodhead sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
167. Hydrography Network, Middle Hudson sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
168. Hydrography Network, Mohawk sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
169. Hydrography Network, Niagara sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
170. Hydrography Network, Northern Long Island sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
171. Hydrography Network, Oak Orchard-Twelvemile sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
172. Hydrography Network, Oneida sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
173. Hydrography Network, Oswegatchie sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
174. Hydrography Network, Oswego sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
175. Hydrography Network, Owego-Wappasening sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
176. Hydrography Network, Raquette sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
177. Hydrography Network, Rondout sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
178. Hydrography Network, Sacandaga sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
179. Hydrography Network, Salmon-Sandy sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
180. Hydrography Network, Sandy Hook-Staten Island sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
181. Hydrography Network, Saugatuck sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
182. Hydrography Network, Schoharie sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
183. Hydrography Network, Seneca sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
184. Hydrography Network, Southern Long Island sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
185. Hydrography Network, St. Regis sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
186. Hydrography Network, Tioga sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
187. Hydrography Network, Upper Allegheny sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
188. Hydrography Network, Upper Delaware sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
189. Hydrography Network, Upper Genesee sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
190. Hydrography Network, Upper Hudson sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
191. Hydrography Network, Upper St. Lawrence sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
192. Hydrography Network, Upper Susquehanna sub-basin, 2000
2000. New York State. Department of Environmental Conservation. Large scale hydrography network tiled by Watershed Boundary Dataset (WBD) sub-basin. Stream network extracted from New York State Large Scale Hydro...
193. Hydrography, New York State, 1979
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...
194. Hydrography, New York State, 1999
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...
195. Hydrography, Tompkins County NY, 2001
2001. Tompkins County Planimetric Project. The Tompkins County Planning Department utilized inter-departmental mapping expertise of the Tompkins County Information Technology Services GIS Di...
196. Impervious Areas, Cayuga Lake watershed, 2003
2003. Cayuga Lake Watershed Network and Nicholas Hollingshead, GIS Analyst. This dataset delineates impervious surfaces within the Cayuga Lake Watershed. However, the current dataset is limited to Cayuga County. These polyg...
197. Index of Digital Elevation Models (DEM), New York
1995. U.S. Geological Survey. This is an index of all the available DEM (digital elevation model) tiles within New York state. Download links are provided for each quad. Each DE...
198. Index of Large Scale Hydrography Network, 2000
2000. New York State. Department of Environmental Conservation. This is an index to Large scale hydrography network tiled by HUC-8 sub-basin boundaries. Stream network extracted from New York State Large Scale H...
199. Index of Large Scale Hydrography Surface Water Areas, 2000
2000. New York State. Department of Environmental Conservation. This is an index to Large scale hydrography surface water areas tiled by HUC-8 sub-basin boundaries. Surface water areas extracted from New York St...
200. Index of National Elevation Dataset (NED 1/3 arcsec), United States
2018. U.S. Geological Survey. This is an index of all the National Elevation Dataset (NED) data tiles available at 1/3 arc-second resolution. Download and metadata links are pro...