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1. 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).

2. 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).

3. 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).

4. Alabama Block Centroid Populations 2002

2000. Environmental Systems Research Institute, Inc. (ESRI). Alabama Block Centroid Populations represents the population of the U.S. Census block centroids for Alabama. U.S. Census blocks are the smallest g... Environmental Systems Research Institute, Inc. (ESRI).

5. Alabama Major Roads 2002

1999. Geographic Data Technology, Inc. (GDT). Alabama Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Alabama. Environmental Systems Research Institute, Inc. (ESRI).

6. Alabama Rivers 2002

1997. Geographic Data Technology, Inc. (GDT). Alabama Rivers represents streams and rivers within Alabama. Environmental Systems Research Institute, Inc. (ESRI).

7. Historical United States County Boundaries, 1990

1990. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1990. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

8. Historical United States County Boundaries, 1980

1980. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1980. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

9. Historical United States County Boundaries, 1970

1970. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1970. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

10. Historical United States County Boundaries, 1960

1960. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1960. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.