Infrastructure Data

GIF images are not cartographic products; they portray the general nature of the data.


Archaeological Resource Potential

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Areas in Illinois believed to posses a high archaeologic potential. Data developed by the Illinois State Museum and intended for coarse regional analysis. ISM, 1994.


U.S. Geographic Names Information System (GNIS) for Illinois

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Point feature class of named places and features in Illinois. It includes place name, location, and general feature type. There are many general feature types, for example, Populated Place, Hospital, Post Office, Reservoir, Airport, Cemetary, and School. USGS 1972 to present.


Municipal Boundaries: Incorporated Places 2000

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Municipalities in Illinois with more than 250 people. Incorporated areas for all of Illinois. Attributes include the name, FIPS place ID, name and type of municipality from the 2000 census. US Census 2000


Political Districts and Boundaries, 2006 and 2007

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State House of Representative Districts in Illinois, State Senate Districts in Illinois, and Illinois Federal Congressional Districts, 2006 and 2007. Illinois State Board of Elections. Data are from the three most recent instances of the US Census, which are 1980, 1990, and 2000; data are current as of 2007.



Political Townships

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Political (voting) township boundaries of Illinois as of 1985. Attributes include the name, FIPS code, township name and number. OREP 1985.



Roads from 1:100,000-scale Digital Line Graphs (1980- 1986)

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This ArcSDE feature dataset contains roads in Illinois as derived from US Geological Survey 1:100,000-scale Digital Line Graph files, transportation layer, 1980-1986. This includes all the DLG roads data that ISGS/IDNR customarily stored by county-by-county prior to 2004. The dataset is subdivided into four feature classes: interstates and defense highways, U.S. highways, Illinois state routes, and "all roads", which includes the three previous classes plus most local roads as of 1986. IDNR, 2004.