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21. United States Hydrographic Polygons, 2013

2011. United States. Bureau of Transportation Statistics, United States. Department of Transportation. Research and Innovative Technology Administration, and United States. Bureau of the Census. The hydro polygon/arc coverages were created using TIGER/LINE 2000 shapefile data gathered from ESRI's Geography Network. The individual county hyd... U.S. Bureau of the Census (BOC).

22. United States Metropolitan Planning Organizations, 2103

2011. United States. Bureau of Transportation Statistics, Federal Highway Administration, and Research and Innovative Technology Administration's Bureau of Transportation Statistics. The United States Metropolitan Planning Organization database is a geographic database of Metropolitan Planning Organization political boundaries.

23. United States Military Installations, 2103

2011. United States. Bureau of Transportation Statistics. The dataset depicts the authoritative boundaries of the most commonly known Department of Defense (DoD) sites, installations, ranges, and training ...

24. United States National Bridge Inventory, 2013

2011. United States. Bureau of Transportation Statistics and United States. Federal Highway Administration. The NBI is a collection of information (database) describing the more than 600,000 of the Nation's bridges located on public roads, including Inter... Federal Highway Administration (FHWA).

25. United States National Park System, 2013

2011. United States. Bureau of Transportation Statistics and United States. National Park Service. United States National Park System, 2013 is a polygon theme representing the National Park System.

26. United States National Waterway Network Points, 2013

2011. United States. Bureau of Transportation Statistics and United States. Army. Corps of Engineers. The National Waterway Network is a comprehensive network database of the nation's navigable waterways. The data set covers the 48 contiguous states...

27. United States Non-Attainment Areas: Carbon Monoxide, 2013

2011. United States. Bureau of Transportation Statistics, United States. Department of Transportation. Research and Innovative Technology Administration, United States. Federal Highway Administration., and United States. Environmental Protection Agency. Non-attainment and maintenance areas for the United States and its territories. The standard for the CO NAA is 9 ppm. For more detailed information... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).

28. United States Non-Attainment Areas: Lead, 2013

2011. United States. Bureau of Transportation Statistics and United States. Environmental Protection Agency. Non-attainment and maintenance areas for the United States and its territories. The standard for the Lead NAA is 0.15 micrograms per cubed meter. F...

29. United States Non-Attainment Areas: Nitrogen Dioxide, 2013

2011. United States. Bureau of Transportation Statistics, United States. Department of Transportation. Research and Innovative Technology Administration, United States. Federal Highway Administration., and United States. Environmental Protection Agency. Non-attainment and maintenance areas for the United States and its territories. The standard for the NO2 NAA is 0.053 ppm. For more detailed inform... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).

30. United States Non-Attainment Areas: Ozone 1 hour, 2013

2011. United States. Bureau of Transportation Statistics, United States. Department of Transportation. Research and Innovative Technology Administration, and United States. Environmental Protection Agency. Non-attainment and maintenance areas for the United States and its territories. The standard for the Ozone 1 hour NAA is 0.12 ppm. For more detaile...