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41. United States Non-Attainment Areas: Ozone, 2008

2008. Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS) and Federal Highway Administration, Office of Planning, HEPP-1. Non-Attainment Areas: Ozone is a polygon theme representing areas in the United States that do not meet the National Ambient Air Quality Standard f... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).

42. United States Non-Attainment Areas: Particulate Matter 10, 2008

2008. Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS) and Federal Highway Administration, Office of Planning, HEPP-1. Non-Attainment Areas: Particulate matter 10 is a polygon theme representing areas in the United States that do not meet the National Ambient Air Qu... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).

43. United States Non-Attainment Areas: Particulate Matter 2.5, 2008

2008. Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS) and Federal Highway Administration, Office of Planning, HEPP-1. Non-Attainment Areas: Particulate matter 2.5 is a polygon theme representing areas in the United States that do not meet the National Ambient Air Q... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).

44. United States Non-Attainment Areas: Sulfur Oxides, 2008

2008. Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS) and Federal Highway Administration, Office of Planning, HEPP-1. Non-Attainment Areas: Sulfur Oxides is a polygon theme representing areas in the United States that do not meet the National Ambient Air Quality St... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).

45. United States Political Boundaries, 2008

2008. International Steering Committee for Global Mapping (ISCGM). United States Political Boundaries is a line theme representing political boundaries in United States. This layer is a component of the Global Ma...

46. United States Political Boundaries (polygons), 2006

2008. International Steering Committee for Global Mapping (ISCGM). United States Political Boundaries is an area theme representing administrative areas in United States. This layer is a component of the Global Map...

47. United States Rail Lines, 2008

2008. Federal Railroad Administration (FRA). United State Rail Lines is a line theme representing railroad tracks in the United States at a 1:100,000 scale. The data set covers all 50 States p... Federal Railroad Administration (FRA).

48. United States Rail Nodes, 2008

2008. Federal Railroad Administration (FRA). United States Rail Nodes is a point theme representing nodes in the United States railway system at a 1:100,000 scale. The data set covers all 50 S... Federal Railroad Administration (FRA).

49. United States Rivers (Generalized)

2008. ESRI. United States Rivers (Generalized) is a polyline theme representing the major rivers within the United States. Attribute information includes the ... ESRI.

50. United States Roads, 2008

2008. International Steering Committee for Global Mapping (ISCGM). United States Roads is a line theme representing roadways in United States. This layer is a component of the Global Map, a 1:1,000,000 scale fra...

51. United States State Plane Zones (NAD 1927), 2008

2008. ESRI. United States State Plane Zones (NAD 1927) is a polygon theme representing the State Plane Coordinate System (SPCS) Zones for the 1927 North Americ... ESRI.

52. United States State Plane Zones (NAD 1983), 2008

2008. ESRI. United States State Plane Zones (NAD 1983) represents the State Plane Coordinate System (SPCS) Zones for the 1983 North American Datum within Unite... ESRI.

53. United States Weigh in Motion (WIM), 2008

2008. Federal Highway Administration (FHWA) and Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS). United States Weigh in Motion (WIM), 2008 is a point theme representing weigh in motion faciliies in the United States. The data included in the G... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).