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231. Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands
2003. Geological Survey (U.S.). Water Resources Division. Wisconsin District. This polygon shapefile contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islan... Geological Survey (U.S.).
232. Public Land Survey System of the United States, 2010
2010. Geological Survey (U.S.). This polygon shapefile portrays the Public Land Surveys of the United States, including areas of private survey, donation land claims, and land gra... Geological Survey (U.S.).
233. Q3 flood data, Maryland
1996. Federal Emergency Management Agency. Q3 flood data for Maryland, 1996. The Q3 Flood Data are derived from the Flood Insurance Rate Maps (FIRMs) published by the Federal Emergency Manag... Federal Emergency Management Agency.
234. Quaternary Fault and Fold Database of the United States (Lines)
2005. Geological Survey (U.S.). This map layer contains locations and information on faults and associated folds, in the United States, that are believed to be sources of signific... National Atlas of the United States.
235. Quaternary Fault and Fold Database of the United States (Polygons)
2005. Geological Survey (U.S.). This map layer contains locations and information on faults and associated folds, in the United States, that are believed to be sources of signific... National Atlas of the United States.
236. Railroad and Bus Passenger Stations of the United States, 2012
2012. National Atlas of the United States. This point shapefile shows Amtrak intercity railroad and bus passenger terminals in the United States. There are no Amtrak stations in Alaska or Ha... National Atlas of the United States.
237. Railroads of the United States, 2005
2005. Geological Survey (U.S.). This line shapefile represents railroads in the conterminous United States and Alaska at 1:2,000,000. This is a replacement for the December 1998 m... Geological Survey (U.S.).
238. Refractory, Abrasive, and Other Industrial Minerals Operations
2003. Geological Survey (U.S.) Minerals Information Team. This point shapefile represents the locations of refractory, abrasive, and other industrial minerals operations in the United States. The data repr... National Atlas of the United States.
239. Saint Marys County, Maryland land parcels, 2014
2014. Boundary Solutions, Inc. Land parcels in Saint Marys County, Maryland, 2014.
240. Saint Marys County, Maryland roads, 2014
2014. U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch. Roads and highways in Saint Marys County, Maryland, 2014. The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected ge...