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1. 1:1,000,000-Scale Combined Statistical Areas, 2013

2013. National Atlas of the United States. This polygon shapefile contains combined statistical areas in the United States and Puerto Rico. Combined statistical areas consist of two or more ... National Atlas of the United States.

2. 1:1,000,000-Scale Core Based Statistical Areas, 2013

2013. National Atlas of the United States. This polygon shapefile contains core based statistical areas in the United States and Puerto Rico. The map layer was created from the CENSUS 2010 T... National Atlas of the United States.

3. 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.).

4. 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.).

5. 1:1,000,000-Scale National Wilderness Preservation System of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile consists of National Wilderness Preservation System areas of 320 acres or more, in the United States, Puerto Rico, and the U... National Atlas of the United States.

6. 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.

7. 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.

8. 1:1,000,000-Scale Waterbodies and Wetlands of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile represents waterbodies and wetlands of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was produc... Geological Survey (U.S.).

9. ACS 5 Year CHAS Data by County, 2008-2012

2008. United States. Department of Housing and Urban Development. This polygon shapefile contains Comprehensive Housing Affordability Strategy (CHAS) data at the county level. The CHAS is derived from the American... United States. Department of Housing and Urban Development.

10. ACS 5 Year CHAS Data by Place, 2008-2012

United States. Department of Housing and Urban Development. This polygon shapefile contains Comprehensive Housing Affordability Strategy (CHAS) data at the place level. The CHAS is derived from the American ... United States. Department of Housing and Urban Development.

11. ACS 5 Year CHAS Data by State, 2008-2012

United States. Department of Housing and Urban Development. This polygon shapefile contains Comprehensive Housing Affordability Strategy (CHAS) data at the state level. The CHAS is derived from the American ... United States. Department of Housing and Urban Development.

12. ACS 5 Year CHAS Data by Summary Level 080, 2008-2012

2008. United States. Department of Housing and Urban Development. This polygon shapefile contains Comprehensive Housing Affordability Strategy (CHAS) data at the geographic summary level 080 (State - County - Coun... United States. Department of Housing and Urban Development.

13. ACS 5 Year Demographic Data by Place, 2008-2012

2008. United States. Department of Housing and Urban Development. This polygon shapefile contains 5-year American Community Survey (ACS) estimates of demographic variables at the place level. The TIGER/Line Files ... United States. Department of Housing and Urban Development.

14. ACS 5 Year Demographic Data by State, 2007-2011

2007. United States. Department of Housing and Urban Development. This polygon shapefile contains 5-year American Community Survey (ACS) estimates of demographic variables at the state level. The TIGER/Line Files ... United States. Department of Housing and Urban Development.

15. ACS 5 Year Demographic Data by Tract, 2008-2012

United States. Department of Housing and Urban Development. This polygon shapefile contains 5-year American Community Survey (ACS) estimates of demographic variables at the tract level. The TIGER/Line Files ... United States. Department of Housing and Urban Development.

16. ACS 5 Year Housing Data by County, 2008-2012

2008. United States. Department of Housing and Urban Development. 5-year American Community Survey estimates of housing variables (see below) at the county level released in 2012. The TIGER/Line Files are shapefil... United States. Department of Housing and Urban Development.

17. ACS 5 Year Housing Data by Place, 2008-2012

2008. United States. Department of Housing and Urban Development. This polygon shapefile contains 5-year American Community Survey estimates of housing variables (see below) at the place level released in 2012. Th... United States. Department of Housing and Urban Development.

18. ACS 5 Year Housing Data by State, 2008-2012

2008. United States. Department of Housing and Urban Development. 5-year American Community Survey estimates of housing variables (see below) at the state level released in 2012. The TIGER/Line Files are shapefile... United States. Department of Housing and Urban Development.

19. ACS 5 Year Housing Data by Tract, 2008-2012

2008. United States. Department of Housing and Urban Development. 5-year American Community Survey estimates of housing variables (see below) at the tract level released in 2012. The TIGER/Line Files are shapefile... United States. Department of Housing and Urban Development.

20. ACS 5 Year Socioeconomic Data by County, 2008-2012

2008. United States. Department of Housing and Urban Development. 5-year American Community Survey estimates of socioeconomic variables (see below) at the county level released in 2012. The TIGER/Line Files are sh... United States. Department of Housing and Urban Development.

21. ACS 5 Year Socioeconomic Data By Place, 2008-2012

2008. United States. Department of Housing and Urban Development. 5-year American Community Survey estimates of socioeconomic variables (see below) at the place level released in 2012. The TIGER/Line Files are sha... United States. Department of Housing and Urban Development.

22. ACS 5 Year Socioeconomic Data by State, 2008-2012

United States. Department of Housing and Urban Development. 5-year American Community Survey estimates of socioeconomic variables (see below) at the state level released in 2012. The TIGER/Line Files are sha... United States. Department of Housing and Urban Development.

23. ACS 5 Year Socioeconomic Data By Tract, 2008-2012

2008. United States. Department of Housing and Urban Development. 5-year American Community Survey estimates of socioeconomic variables at the tract level released in 2012. The TIGER/Line Files are shapefiles and ... United States. Department of Housing and Urban Development.

24. Administrative Boundaries of National Park System Units, 2011

2011. United States. Bureau of Transportation Statistics. This polygon shapefile depicts service wide boundary set for display and general analysis purposes. This layer is part of the 2014 National Transpo... United States. Bureau of Transportation Statistics.

25. 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.

26. Agriculture Census of the United States, 2002

2002. National Atlas of the United States. This polygon shapefile portrays a selected set of information that was collected for the 2002 Census of Agriculture by the National Agricultural St... National Atlas of the United States.

27. Agriculture Census of the United States, 2007

2007. National Atlas of the United States. This polygon shapefile portrays a selected set of information that was collected for the 2007 Census of Agriculture by the National Agricultural St... National Atlas of the United States.

28. Alabama Block Groups 2002

2002. Geographic Data Technology, Inc. (GDT). Alabama Block Groups represents the U.S. Census block groups of Alabama. Environmental Systems Research Institute, Inc. (ESRI).

29. Alabama Tracts 2002

2002. Geographic Data Technology, Inc. (GDT). Alabama Tracts represents the U.S. Census tracts and block numbering areas (BNA) of Alabama. Environmental Systems Research Institute, Inc. (ESRI).

30. Alabama ZIP Code Areas 2002

2001. Geographic Data Technology, Inc. (GDT). Alabama ZIP Code Areas represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of a... Environmental Systems Research Institute, Inc. (ESRI).

31. Alaska Block Groups 2002

2002. Geographic Data Technology, Inc. (GDT). Alaska Block Groups represents the U.S. Census block groups of Alaska. Environmental Systems Research Institute, Inc. (ESRI).

32. Alaska Tracts 2002

2002. Geographic Data Technology, Inc. (GDT). Alaska Tracts represents the U.S. Census tracts and block numbering areas (BNA) of Alaska. Environmental Systems Research Institute, Inc. (ESRI).

33. Alaska ZIP Code Areas 2002

2001. Geographic Data Technology, Inc. (GDT). Alaska ZIP Code Areas represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of a ... Environmental Systems Research Institute, Inc. (ESRI).

34. Areas and Facies Types of Metamorphism: Geology of the Conterminous United States, 2005

2005. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This line shapefile shows the outlines of major calderas and impact structures in the United States. This layer is part of the Geologic Map of the ... Geological Survey (U.S.).

35. Arizona Block Groups 2002

2002. Geographic Data Technology, Inc. (GDT). Arizona Block Groups represents the U.S. Census block groups of Arizona. Environmental Systems Research Institute, Inc. (ESRI).

36. Arizona Tracts 2002

2002. Geographic Data Technology, Inc. (GDT). Arizona Tracts represents the U.S. Census tracts and block numbering areas (BNA) of Arizona. Environmental Systems Research Institute, Inc. (ESRI).

37. Arizona ZIP Code Areas 2002

2001. Geographic Data Technology, Inc. (GDT). Arizona ZIP Code Areas represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of a... Environmental Systems Research Institute, Inc. (ESRI).

38. Arkansas Block Groups 2002

2002. Geographic Data Technology, Inc. (GDT). Arkansas Block Groups represents the U.S. Census block groups of Arkansas. Environmental Systems Research Institute, Inc. (ESRI).

39. Arkansas Tracts 2002

2002. Geographic Data Technology, Inc. (GDT). Arkansas Tracts represents the U.S. Census tracts and block numbering areas (BNA) of Arkansas. Environmental Systems Research Institute, Inc. (ESRI).

40. Arkansas ZIP Code Areas 2002

2001. Geographic Data Technology, Inc. (GDT). Arkansas ZIP Code Areas represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of ... Environmental Systems Research Institute, Inc. (ESRI).

41. Bailey's Ecoregions and Subregions of the United States, 2004

2004. United States. Forest Service. This polygon shapefile is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.... National Atlas of the United States.

42. Biomass Resource Potential in the United States, Fall 2014

2015. Hart Energy Publishing. This polygon dataset contains estimates of biomass resource potential for the lower 48 states of the United States. The following feedstock categor... Hart Energy Publishing.

43. Biomass Resource Potential in the United States, Spring 2013

2013. Hart Energy Publishing. This polygon dataset contains estimates of biomass resource potential for the lower 48 states of the United States. The following feedstock categor... Hart Energy Publishing.

44. Biomass Resource Potential in the United States, Summer 2014

2014. Hart Energy Publishing. This polygon dataset contains estimates of biomass resource potential for the lower 48 states of the United States. The following feedstock categor... Hart Energy Publishing.

45. 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.

46. California Block Groups 2002

2002. Geographic Data Technology, Inc. (GDT). California Block Groups represents the U.S. Census block groups of California. Environmental Systems Research Institute, Inc. (ESRI).

47. California Tracts 2002

2002. Geographic Data Technology, Inc. (GDT). California Tracts represents the U.S. Census tracts and block numbering areas (BNA) of California. Environmental Systems Research Institute, Inc. (ESRI).

48. California ZIP Code Areas 2002

2001. Geographic Data Technology, Inc. (GDT). California ZIP Code Areas represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit o... Environmental Systems Research Institute, Inc. (ESRI).

49. CDBG Activity by Tract, 1996-2016

1996. United States. Department of Housing and Urban Development. The Community Development Block Grant (CDBG) is a federal block grant distributed via formula to states and local governments. States and local gov... United States. Department of Housing and Urban Development.

50. CDBG Grantee Areas, 2016

2016. United States. Department of Housing and Urban Development. This polygon shapefile represents the boundaries of Community Development Block Grant (CDBG) Entitlement Communities and State Administered CDBG gr... United States. Department of Housing and Urban Development.