2008. National Center for Ecological Analysis and Synthesis. The goal of the research presented here is to estimate and visualize, for the first time, the global impact humans are having on the ocean's ecosys...
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2008. Research Data Services (RDS). Index to the Lehman Scanned Map Collection is a polygon theme that serves as an index to scanned sheets from the Lehman Map collection. Each featu...
2008. U.S. Geological Survey. National Populated Places 2000 is a point theme representing cities in the United States, Puerto Rico and the U.S. Virgin Islands. These cities we... U.S. Geological Survey.
2008. Stackhouse, Cecil and United States. Bureau of Transportation Statistics. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the lead (Pb) 3... United States. Bureau of Transportation Statistics.
2008. Stackhouse, Cecil and United States. Bureau of Transportation Statistics. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3) ... United States. Bureau of Transportation Statistics.
2008. International Steering Committee for Global Mapping (ISCGM). United States Railroads is a line theme representing railroads in United States . This layer is a component of the Global Map, a 1:1,000,000 sc...
2008. Federal Aviation Administration and Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS). United States Airport Runways, 2008 is line theme representing airport runways in the United States and US territories. Attributei information incl... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).
2008. International Steering Committee for Global Mapping (ISCGM). United States Airports is a point theme representing airports and airfields in United States. This layer is a component of the Global Map, a 1:1,...
2008. National Renewable Energy Laboratory. United States Alternative Fueling Facilities is a point theme representing fueling facilities that offer fuels other than gasoline in the United St... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).
2008. Federal Railroad Administration (FRA). Amtrak Stations database is a point theme representing Amtrak intercity railroad passenger terminals in the United States and Canada. Attribute dat... Federal Railroad Administration (FRA).
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