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2013. The Purdue historical campus map collection was scanned and georeferenced by Purdue University Libraries. The physical maps were collected as Purdu... Purdue University Libraries.
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, and 2006. Nature Conservancy (U.S.). This data product was created as part of the Northwest Atlantic Marine Ecoregional Assessment. The Nature Conservancy developed this science-based ... Northeast Ocean Data.
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, and 2006. Nature Conservancy (U.S.). This data product was created as part of the Northwest Atlantic Marine Ecoregional Assessment. The Nature Conservancy developed this science-based ... Northeast Ocean Data.
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, and 2006. Nature Conservancy (U.S.). This data product was created as part of the Northwest Atlantic Marine Ecoregional Assessment. The Nature Conservancy developed this science-based ... Northeast Ocean Data.
1840. Thomas, William G., 1964-. This line shapefile represents the railroad network of the United States in 1840. This layer is part of the Railroads and the Making of Modern Amer... University of Nebraska--Lincoln.
1845. Thomas, William G., 1964-. This line shapefile represents the railroad network of the United States in 1845. This layer is part of the Railroads and the Making of Modern Amer... University of Nebraska--Lincoln.
1850. Thomas, William G., 1964-. This line shapefile represents the railroad network of the United States in 1850. This layer is part of the Railroads and the Making of Modern Amer... University of Nebraska--Lincoln.
1861. Thomas, William G., 1964-. This line shapefile represents the railroad network of the United States in 1861. This layer is part of the Railroads and the Making of Modern Amer... University of Nebraska--Lincoln.
2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, and 2016. Gap Analysis Program (U.S.). This polygon shapefile contains combined PAD-US Fee and Easements features for Louisiana. The USGS Protected Areas Database of the United States (P... Gap Analysis Program (U.S.).
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Louisiana. School districts are geographic entities within which state,... U.S. Census Bureau. Geography Division.