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1. Illinois Block Centroid Populations 2002
2000. Environmental Systems Research Institute, Inc. (ESRI). Illinois Block Centroid Populations represents the population of the U.S. Census block centroids for Illinois. U.S. Census blocks are the smallest... Environmental Systems Research Institute, Inc. (ESRI).
2. Illinois Block Groups 2002
2002. Geographic Data Technology, Inc. (GDT). Illinois Block Groups represents the U.S. Census block groups of Illinois. Environmental Systems Research Institute, Inc. (ESRI).
3. Illinois Major Roads 2002
1999. Geographic Data Technology, Inc. (GDT). Illinois Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Illinois. Environmental Systems Research Institute, Inc. (ESRI).
4. Illinois Rivers 2002
1997. Geographic Data Technology, Inc. (GDT). Illinois Rivers represents streams and rivers within Illinois. Environmental Systems Research Institute, Inc. (ESRI).
5. Illinois Tracts 2002
2002. Geographic Data Technology, Inc. (GDT). Illinois Tracts represents the U.S. Census tracts and block numbering areas (BNA) of Illinois. Environmental Systems Research Institute, Inc. (ESRI).
6. Illinois ZIP Code Areas 2002
2001. Geographic Data Technology, Inc. (GDT). Illinois 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).
7. Historical United States County Boundaries, 1790
1790. 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 1790. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.
8. Historical United States County Boundaries, 1800
1800. 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 1800. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.
9. Historical United States County Boundaries, 1810
1810. 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 1810. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.
10. Historical United States County Boundaries, 1820
1820. 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 1820. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.