• Illinois Coordinate System of 1983 Randolph zone (US survey foot)

  EPSG:12144
  Area of use: United States (USA) - Illinois - Randolph county.
  

• Illinois Coordinate System of 1983 Mount Vernon zone (US survey foot)

  EPSG:11260
  Area of use: United States (USA) - Illinois - counties of Clinton, Jefferson, Marion and Washington.
  

• Illinois Coordinate System of 1983 Clinton-Washington zone (US survey foot)

  EPSG:12000
  Area of use: United States (USA) - Illinois - counties of Clinton and Washington.
  

• Illinois Coordinate System of 1983 Jersey-Greene zone (US survey foot)

  EPSG:12033
  Area of use: United States (USA) - Illinois - counties of Greene and Jersey.
  

• Illinois Coordinate System of 1983 St Clair zone (US survey foot)

  EPSG:12149
  Area of use: United States (USA) - Illinois - St Clair county.
  

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