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

  EPSG:11256
  Area of use: United States (USA) - Illinois - counties of Christian and Montgomery.
  

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

  EPSG:11234
  Area of use: United States (USA) - Illinois - counties of Cook, DuPage and Lake.
  

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

  EPSG:11239
  Area of use: United States (USA) - Illinois - counties of Henderson, Mercer and Warren.
  

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

  EPSG:11240
  Area of use: United States (USA) - Illinois - counties of Fulton, Knox and Stark.
  

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

  EPSG:11247
  Area of use: United States (USA) - Illinois - counties of Brown, McDonough and Schuyler.
  

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

  EPSG:11251
  Area of use: United States (USA) - Illinois - counties of Morgan, Pike and Scott.
  

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

  EPSG:11253
  Area of use: United States (USA) - Illinois - counties of Coles, Douglas and Edgar.
  

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

  EPSG:11257
  Area of use: United States (USA) - Illinois - counties of Bond, Effingham and Fayette.
  

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

  EPSG:11265
  Area of use: United States (USA) - Illinois - counties of Lee, Ogle and Winnebago.
  

• 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 CS27 East zone

  EPSG:11201
  Area of use: United States (USA)
  

• Illinois CS27 West zone

  EPSG:11202
  Area of use: United States (USA)
  

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

  EPSG:11237
  Area of use: United States (USA) - Illinois - counties of Bureau, Grundy, LaSalle and Putnam.
  

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

  EPSG:11248
  Area of use: United States (USA) - Illinois - counties of Cass, Logan, Mason and Menard.
  

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

  EPSG:11258
  Area of use: United States (USA) - Illinois - counties of Clark, Crawford, Cumberland and Jasper.
  

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

  EPSG:11259
  Area of use: United States (USA) - Illinois - counties of Madison, Monroe and St Clair.
  

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

  EPSG:11264
  Area of use: United States (USA) - Illinois - counties of Carroll, Jo Daviess and Stephenson.
  

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

  EPSG:11233
  Area of use: United States (USA) - Illinois - counties of Boone, Dekalb, Kane, Kendall and McHenry.
  

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

  EPSG:11249
  Area of use: United States (USA) - Illinois - counties of Dewitt, Macon, Moultrie, Piatt and Shelby.
  

• 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 Olney zone (US survey foot)

  EPSG:11261
  Area of use: United States (USA) - Illinois - counties of Clay, Edwards, Lawrence, Richland, Wabash and Wayne.
  

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

  EPSG:11263
  Area of use: United States (USA)
  

• SPCS83 Illinois East zone (meter)

  EPSG:11231
  Area of use: United States (USA)
  

• SPCS83 Illinois West zone (meter)

  EPSG:11232
  Area of use: United States (USA)
  

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

  EPSG:11262
  Area of use: United States (USA)
  

• SPCS83 Illinois East zone (US survey foot)

  EPSG:15387
  Area of use: United States (USA)
  

• SPCS83 Illinois West zone (US survey foot)

  EPSG:15388
  Area of use: United States (USA)
  

• NAD83 to NAD83(HARN) (38)

  EPSG:1553
  Area of use: United States (USA) - Illinois.
  

• NAD83 to WGS 84 (52)

  EPSG:1748
  Area of use: United States (USA) - Illinois.
  

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• Area (62)