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1. 1:1,000,000-Scale County Boundaries of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands, by showing the counties as ar... Geological Survey (U.S.).

2. 1:1,000,000-Scale National Boundaries of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile contains the boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by extract... Geological Survey (U.S.).

3. 1:1,000,000-Scale State Boundaries of the United States, 2012

2012. National Atlas of the United States. This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by e... National Atlas of the United States.

4. 1:1,000,000-Scale State Boundaries of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by e... National Atlas of the United States.

5. Administrative County Boundaries: United States and Territories, 2011

2011. United States. Bureau of the Census. Geography Division and United States. Bureau of Transportation Statistics. This polygon shapefile contains United States administrative county boundaries extracted from the U.S. Census Bureau's MAF/TIGER Database (MTDB). T... United States. Bureau of Transportation Statistics.

6. Boundary, United States, 2015

Hijmans, Robert J. and University of California, Berkeley. Museum of Vertebrate Zoology. This polygon shapefile contains the boundary of United States (adm0). This layer is part of the Global Administrative Areas 2015 (v2.8) dataset. University of California, Berkeley. Museum of Vertebrate Zoology.

7. Congressional Districts: United States and Territories, 2013-2015

2013. United States. Bureau of Transportation Statistics and Rawson, Peg. This polygon shapefile contains United States congressional district boundaries for 2013-2015. Congressional Districts are the 435 areas from which... United States. Bureau of Transportation Statistics.

8. County Boundaries of the United States, 1980

1980. Geological Survey (U.S.). This polygon shapefile contains the 1980 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

9. County Boundaries of the United States, 1990

1990. Geological Survey (U.S.). This polygon shapefile portrays the 1990 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

10. County Boundaries of the United States, 2000

2000. Geological Survey (U.S.). This polygon shapefile portrays the 2000 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

11. County Boundaries with Politicial Limit: United States and Territories, 2014

2014. United States. Bureau of Transportation Statistics. This polygon shapefile contains United States county boundaries with political limits extracted from the U.S. Census Bureau's MAF/TIGER Database (M... United States. Bureau of Transportation Statistics.

12. First-level Administrative Divisions, United States, 2015

Hijmans, Robert J. and University of California, Berkeley. Museum of Vertebrate Zoology. This polygon shapefile contains the first-level administrative divisions of United States (adm1). Level 1 divisions include states and federal dist... University of California, Berkeley. Museum of Vertebrate Zoology.

13. 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.

14. Metropolitan and Micropolitan Statistical Areas: United States and Territories, 2013

2013. United States. Bureau of the Census. Geography Division and United States. Bureau of Transportation Statistics. This polygon shapefile contains areas of metroplitan and micropolitan statistics extracted from the United States Census MAF/TIGER Database (MTDB).... United States. Bureau of Transportation Statistics.

15. North America (City Limits, 2009)

Environmental Systems Research Institute (Redlands, Calif.) and Tele Atlas B.V. Environmental Systems Research Institute (Redlands, Calif.).

16. North America (City Limits, 2010)

Environmental Systems Research Institute (Redlands, Calif.), Tele Atlas B.V., and Tele Atlas North America, Inc. U.S. and Canada City Areas represents the city limits of cities in the United States and Canada.This data set provides six feature classes for disp... Tele Atlas North America, Inc.

17. North America ((ISO) Independent System Operator Zones, 2008)

Platts. The Platts Independent System Operator (ISO) Zones geospatial data layer contains regions representing the geographic extent of the wholesale power... Platts.

18. Second-level Administrative Divisions, United States, 2015

Hijmans, Robert J. and University of California, Berkeley. Museum of Vertebrate Zoology. This polygon shapefile contains the second-level administrative divisions of United States (adm2). Level 2 divisions include counties and cities. T... University of California, Berkeley. Museum of Vertebrate Zoology.

19. State Boundaries of the United States, 2005

1972. Geological Survey (U.S.). This polygon shapefile portrays the state boundaries of the United States, and the boundaries of Puerto Rico and the U.S. Virgin Islands. The map l... Geological Survey (U.S.).

20. State Boundaries: United States and Territories, 2012

2012. United States. Bureau of Transportation Statistics and United States. Bureau of the Census. Geography Division. This polygon shapefile depicts state boundaries extending into the ocean with detailed shorelines, including all 50 states plus Puerto Rico, Washin... United States. Bureau of Transportation Statistics.

21. State Boundaries with Political Limit: United States and Territories, 2012

2012. United States. Bureau of Transportation Statistics and United States. Bureau of the Census. Geography Division. This polygon shapefile depicts state boundaries with politicial limit extending into the ocean with detailed shorelines, including all 50 states pl... United States. Bureau of Transportation Statistics.

22. Units of General Local Government, 2016

2016. United States. Department of Housing and Urban Development. The term "Unit of General Local Government" (UGLG) means a city, county, town, parish, village, or other general-purpose political subdivision of a... United States. Department of Housing and Urban Development.

23. U.S. States, 2007-2013

2010. TomTom North America, Inc. and Environmental Systems Research Institute (Redlands, Calif.). This polygon shapefile represents the 50 states, the District of Columbia, and Puerto Rico of the United States at 1:100,000 scale.This layer also ... Environmental Systems Research Institute (Redlands, Calif.).

24. USA (Counties, 1996)

ESRI. US counties. Environmental Systems Research Institute (ESRI).

25. USA (Counties, 2005)

Tele Atlas North America, Inc./Geographic Data Technology, Inc., United States Central Intelligence Agency, ESRI Business Information Solutions, ESRI, Department of Commerce, Census Bureau, and U.S. Department of Agriculture (USDA), National Agricultural Statistics Service (NASS). U.S. Counties represents the counties of the United States in the 50 states, the District of Columbia, and Puerto Rico. United States Central Intelligence Agency.

26. USA (Counties Generalized, 2000)

Environmental Systems Research Institute, Inc. (ESRI), CACI International, Inc., and Department of Commerce, Census Bureau. U.S. Counties (Generalized) represents the counties of the United States in the fifty states and the District of Columbia. Department of Commerce, Census Bureau.

27. USA (Counties (Generalized), 2005)

U.S. Department of Agriculture (USDA), National Agricultural Statistics Service (NASS), ESRI Business Information Solutions, Tele Atlas North America, Inc./Geographic Data Technology, Inc., Department of Commerce, Census Bureau, and ESRI. U.S. Counties (Generalized) represents the counties of the United States in the 50 states and the District of Columbia. Tele Atlas North America, Inc./Geographic Data Technology, Inc.

28. USA (County Subdivisions, 2009)

ESRI and Tele Atlas. Environmental Systems Research Institute (ESRI).

29. USA (Deregulated States, Dec. 2008)

Platts. The Deregulated States layer contains statewide data pertaining to the status of electric and gas deregulation. . Platts.

30. USA (Designated Market Areas, 2000)

Environmental Systems Research Institute, Inc. (ESRI), Geographic Data Technology, Inc. (GDT), and Geographic Data Technology, Inc. A U.S. Designated Market Area (DMA) is generally the group of surrounding counties or split counties (by five-digit ZIP) in which metropolitan cent... Geographic Data Technology, Inc.

31. USA (Federal and Indian Land, 2005)

ESRI, National Atlas of the United States and the U.S. Geological Survey, and National Atlas of the United States and the United States Geological Survey. U.S. National Atlas Federal and Indian Land Areas represents the federal- and Indian-owned land areas (for example, Bureau of Indian Affairs, Depar... U.S. Geological Survey.

32. USA (Five-Digit ZIP Code Areas, 2007)

ESRI, Department of Commerce, Census Bureau, and Tele Atlas North America, Inc. U.S. ZIP Code Areas (Five-Digit) represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first d... Department of Commerce, Census Bureau.

33. USA (Metropolitan Statistical Areas, 2000)

Environmental Systems Research Institute, Inc. (ESRI), Geographic Data Technology, Inc. (GDT), and Geographic Data Technology, Inc. U.S. Metropolitan Statistical Areas represents geographic entities, defined by the United States Office of Management and Budget for use by Federal... Geographic Data Technology, Inc.

34. USA (States - Generalized, 2006)

U.S. Department of Agriculture (USDA), National Agricultural Statistics Service (NASS), Tele Atlas North America, Inc., Department of Commerce, Census Bureau, and ESRI. U.S. States (Generalized) represents the 50 states and the District of Columbia of the United States. Tele Atlas North America, Inc.

35. USA (States Generalized, 2000)

Environmental Systems Research Institute, Inc. (ESRI), CACI International, Inc., and Department of Commerce, Census Bureau. U.S. States (Generalized) represents the fifty states and the District of Columbia of the United States. Department of Commerce, Census Bureau.

36. USA (Urbanized Area Boundaries, 2000)

US Bureau of the Census (BOC) and Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS). The Bureau of the Census Urbanized Area Boundaries data set contains boundary information for urban areas with a population greater than 50,000. T... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).