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51. Forest Cover Types, United States, 2002

2002. United States. Forest Service and Geological Survey (U.S.). This raster layer portrays general forest cover types for the United States in GeoTIFF format. Data were derived from Advanced Very High Resolution... National Atlas of the United States.

52. Global Map: 1:1,000,000-Scale Canals and Aqueducts of the United States, 2014

2014. National Atlas of the United States. This line shapefile includes Global Map data showing the canals, aqueducts, and the Intracoastal Waterway in the United States, Puerto Rico, and th... National Atlas of the United States.

53. Global Map: 1:1,000,000-Scale Political Areas of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile includes Global Map data showing the counties and equivalent entities of the United States, Puerto Rico, and the U.S. Virgin... National Atlas of the United States.

54. Global Map: 1:1,000,000-Scale Political Boundary Lines of the United States, 2014

2014. National Atlas of the United States. This line shapefile includes Global Map data showing the counties and equivalent entities of the United States, Puerto Rico, and the U.S. Virgin Is... National Atlas of the United States.

55. Global Map: 1:1,000,000-Scale Railroads of the United States, 2014

2014. National Atlas of the United States. This line shapefile includes Global Map data showing railroads in the conterminous United States and Alaska. The data are a modified version of the... National Atlas of the United States.

56. Global Map: 1:1,000,000-Scale Streams of the United States, 2014

2014. National Atlas of the United States. This line shapefile includes Global Map data showing streams in the United States, Puerto Rico, and the U.S. Virgin Islands. The data are a modifie... National Atlas of the United States.

57. Global Map: Airports of the United States, 2014

2014. National Atlas of the United States. This point shapefile represents airports in the United States, Puerto Rico, and the Virgin Islands. This layer includes 1:1 million scale data from... National Atlas of the United States.

58. Global Map: Cities and Towns of the United States, 2014

2014. National Atlas of the United States. This point shapefile includes Global Map data showing cities and towns in the United States, Puerto Rico, and the U.S. Virgin Islands. The data are... National Atlas of the United States.

59. Grayscale Conterminous United States Shaded Relief, 200-Meter Resolution, Albers projection

2002. EROS Data Center. The grayscale conterminous United States shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of the co... National Atlas of the United States.

60. Grayscale North America Shaded Relief 1-Kilometer Resolution

1993. EROS Data Center. The grayscale North America shaded relief data were derived from the GTOPO30 elevation data. GTOPO30 is a global digital elevation model (DEM) with... National Atlas of the United States.

61. Hazardous Waste, Generated, Shipped, Received 2001-2007

2001. National Atlas of the United States. This polygon shapefile portrays the hazardous waste generated, shipped, and received by state and other areas within the United States, Puerto Rico... National Atlas of the United States.

62. Indian Lands of the United States, 2006

2006. National Atlas of the United States. This polygon shapefile shows Indian lands of the United States. Only areas of 640 acres or more are included. Federally-administered lands within a... National Atlas of the United States.

63. Magnetic Field - Declination Component for the Epoch 2010.0

2010. National Geophysical Data Center. This map layer shows isogonic lines (lines of constant declination of the Earth's magnetic field), derived from the International Geomagnetic Refer... National Atlas of the United States.

64. Magnetic Field - Horizontal Component of the Total Field Intensity for the Epoch 2010.0

2010. National Geophysical Data Center. This line shapefile shows lines of equal horizontal intensity of the Earth's magnetic field, derived from the International Geomagnetic Reference F... National Atlas of the United States.

65. Magnetic Field - Inclination Component for the Epoch 2010.0

2010. National Geophysical Data Center. This shapefile shows isoclinic lines (lines of constant inclination of the Earth's magnetic field), derived from the International Geomagnetic Refe... National Atlas of the United States.

66. Magnetic Field - Secular Variation of the Declination Component for the Epoch 2010.0

2010. National Geophysical Data Center. This map layer shows isoporic lines (lines of equal annual change, or secular variation, in the declination of the Earth's magnetic field), derived... National Atlas of the United States.

67. Magnetic Field - Secular Variation of the Horizontal Component of the Total Field Intensity for the Epoch 2010.0

2010. National Geophysical Data Center. This line shapefile shows lines of equal annual change (secular variation) in the horizontal component of the total field intensity of the Earth's ... National Atlas of the United States.

68. Magnetic Field - Secular Variation of the Inclination Component for the Epoch 2010.0

2010. National Geophysical Data Center. This shapefile shows lines of equal annual change (secular variation) in the inclination of the Earth's magnetic field, derived from the Internatio... National Atlas of the United States.

69. Magnetic Field - Secular Variation of the Total Field Component for the Epoch 2010.0

2010. National Geophysical Data Center. This line shapefile shows lines of equal annual change (secular variation), in the total field intensity of the Earth's magnetic field, derived fro... National Atlas of the United States.

70. Magnetic Field - Secular Variation of the Vertical Component of the Total Field Intensity for the Epoch 2010.0

2010. National Geophysical Data Center. This line shapefile shows lines of equal annual change (secular variation) in the vertical component of the total field intensity of the Earth's ma... National Atlas of the United States.

71. Magnetic Field - Total Field Intensity for the Epoch 2010.0

2010. National Geophysical Data Center. This shapefile contains isodynamic lines (lines of equal total intensity of the Earth's magnetic field), derived from the International Geomagnetic... National Atlas of the United States.

72. Magnetic Field - Vertical Component of the Total Field Intensity for the Epoch 2010.0

2010. National Geophysical Data Center. This line shapefile shows lines of equal vertical intensity of the Earth's magnetic field, derived from the International Geomagnetic Reference Fie... National Atlas of the United States.

73. Miscellaneous Industrial Minerals Operations

2003. Geological Survey (U.S.) Minerals Information Team. This point shapefile represents ferrous metal processing plants in the United States. The data represent commodities covered by the Minerals Inform... National Atlas of the United States.

74. National Fire Plan - Hazardous Fuels Reduction Program, 2004

2004. National Atlas of the United States. This polygon shapefile portrays county level data for the fiscal-year-2004 National Fire Plan - Hazardous Fuels Reduction Program. The purpose of t... National Atlas of the United States.

75. National Wilderness Preservation System of the United States, 2006

1972. National Atlas of the United States. This polygon shapefile contains National Wilderness Preservation System areas of 640 acres or more, in the United States, Puerto Rico, and the U.S.... National Atlas of the United States.

76. Nonferrous Metal Mines

2003. Geological Survey (U.S.) Minerals Information Team. This point shapefile represents locations of nonferrous metal mines in the United States. The data represent commodities covered by the Minerals In... National Atlas of the United States.

77. Nonferrous Metal Processing Plants

2003. Geological Survey (U.S.) Minerals Information Team. This point shapefile includes nonferrous metal processing plants in the United States. The data represent commodities covered by the Minerals Infor... National Atlas of the United States.

78. Omernik's Level III Ecoregions of the Continental United States, 2003

2003. United States. Environmental Protection Agency. This polygon shapefile shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of... National Atlas of the United States.

79. Ports of the United States, 2014

2014. National Atlas of the United States. This map layer shows major ports in the United States, Puerto Rico, and the U.S. Virgin Islands. A port is a city, town, or urban area with a harbo... National Atlas of the United States.

80. Refractory, Abrasive, and Other Industrial Minerals Operations

2003. Geological Survey (U.S.) Minerals Information Team. This point shapefile represents the locations of refractory, abrasive, and other industrial minerals operations in the United States. The data repr... National Atlas of the United States.

81. Sand and Gravel Operations in the United States

2002. Geological Survey (U.S.) Minerals Information Team. This point shapefile includes sand and gravel operations in the United States. These data were obtained from information reported voluntarily to th... National Atlas of the United States.

82. Seismic Hazard Map for the United States

2012. Rukstales, Kenneth S. (compiler). This polygon shapefile represents seismic hazards in the United States. The data represent a model showing the probability that ground motion will ... National Atlas of the United States.

83. Significant United States Earthquakes, 1568-2009

1568. Geological Survey (U.S.). This point shapefile contains the locations and attributes of significant, historic earthquakes that caused deaths, property damage, and geological... National Atlas of the United States.

84. Spread of Africanized Honey Bees in the United States, 1990-2005

1990. United States. Agricultural Research Service. This polygon shapefile portrays the spread, by year, of the Africanized honey bee (AHB) in the United States, Puerto Rico, and the U.S. Virgin Isla... National Atlas of the United States.

85. Time Zones of the United States, 2005

1972. National Atlas of the United States. This polygon shapefile portrays the time zones of the United States, Puerto Rico, and the U.S. Virgin Islands. Also included are the Greenwich Mean... National Atlas of the United States.

86. Topographic and Bathymetric Shaded Relief of North America

2005. National Atlas of the United States. The Topographic and Bathymetric Shaded Relief of North America map layer shows depth and elevation ranges using colors, with relief enhanced by sha... National Atlas of the United States.

87. United States Crimes 1994-2000

1994. National Atlas of the United States. This map layer shows crime statistics for the United States for theyears 1994-2000, drawn from the Uniform Crime Reporting Program datacompiled by ... National Atlas of the United States.

88. United States Crimes 2001-2002

2001. National Atlas of the United States. This map layer shows crime statistics for the United States for the years 2001-2002, drawn from the Uniform Crime Reporting Program datacompiled by... National Atlas of the United States.

89. United States Income and Employment 1979-1981

1979. National Atlas of the United States. This map layer portrays 1979, 1980, and 1981 estimates for total personal income, per capita personal income, annual number of full-time and part-t... National Atlas of the United States.

90. United States Income and Employment 1982

1982. National Atlas of the United States. This map layer portrays 1982 estimates for total personal income, per capita personal income, annual number of full-time and part-time jobs, averag... National Atlas of the United States.

91. United States Income and Employment 1983-1987

1983. National Atlas of the United States. This map layer portrays 1983 to 1987 estimates for total personal income, per capita personal income, annual number of full-time and part-time job... National Atlas of the United States.

92. United States Income and Employment 1988

1988. National Atlas of the United States. This map layer portrays 1988 estimates for total personal income, per capita personal income, annual number of full-time and part-time jobs, averag... National Atlas of the United States.

93. United States Income and Employment 1989-1990

1989. National Atlas of the United States. This map layer portrays 1989 and 1990 estimates for total personal income, per capita personal income, annual number of full-time and part-time job... National Atlas of the United States.

94. United States Income and Employment 1991-1992

1991. National Atlas of the United States. This map layer portrays 1991 and 1992 estimates for total personal income, per capita personal income, annual number of full-time and part-time job... National Atlas of the United States.

95. United States Income and Employment 1993-2001

1993. National Atlas of the United States. This map layer portrays 1993 to 2001 estimates for total personal income, per capita personal income, annual number of full-time and part-time jobs... National Atlas of the United States.

96. United States Income and Employment 2002-2003

2002. National Atlas of the United States. This map layer portrays 2002 and 2003 estimates for total personal income, per capita personal income, annual number of full-time and part-time job... National Atlas of the United States.

97. United States Income and Employment 2004-2008

2004. National Atlas of the United States. This map layer portrays 2004-2008 per capita personal income, annual number of full-time and part-time jobs, average wage per job in dollars, popul... National Atlas of the United States.

98. United States Labor Statistics 2000-2001

2000. National Atlas of the United States. This data set portrays labor statistics annual averages for the years 2000 and 2001, shown by county, for the United States and Puerto Rico. The d... National Atlas of the United States.

99. United States Labor Statistics 2002-2004

2002. National Atlas of the United States. This data set portrays labor statistics annual averages for the years 2002 to 2004, shown by county, for the United States and Puerto Rico. The da... National Atlas of the United States.

100. United States Labor Statistics 2005-2009

2005. National Atlas of the United States. This data set portrays labor statistics annual averages for the years 2005 to 2009, shown by county, for the United States and Puerto Rico. The da... National Atlas of the United States.