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1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, and 2004. National Center for Ecological Analysis and Synthesis. This raster dataset shows the intensity of ultraviolet (UV) radiation reaching the surface of Earth from August 1996 to July 2004 as part of the GS... Science.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Alabama. School districts are geographic entities within which state, c... U.S. Census Bureau. Geography Division.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Alaska. School districts are geographic entities within which state, co... U.S. Census Bureau. Geography Division.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Arizona. School districts are geographic entities within which state, c... U.S. Census Bureau. Geography Division.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Arkansas. School districts are geographic entities within which state, ... U.S. Census Bureau. Geography Division.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in California. School districts are geographic entities within which state... U.S. Census Bureau. Geography Division.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Colorado. School districts are geographic entities within which state, ... U.S. Census Bureau. Geography Division.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Connecticut. School districts are geographic entities within which stat... U.S. Census Bureau. Geography Division.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Delaware. School districts are geographic entities within which state, ... U.S. Census Bureau. Geography Division.
2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in the District of Columbia. School districts are geographic entities with... U.S. Census Bureau. Geography Division.