EPSG
Guide to the Illinois State Plane Coordinate System, https://clearinghouse.isgs.illinois.edu
2023-02-02
Engineering survey, topographic mapping (large and medium scale).
Part of the ICS83 33-zone system. Longitude of origin also given by information source as 269°51'E. State law defines grid unit as US survey foot. No equivalent metric definition.
United States (USA) - Illinois - counties of Greene and Macoupin.
(0,)
Definition: OGC Well Known Text
PROJECTION["Lambert_Conformal_Conic_1SP"], PARAMETER["latitude_of_origin",39.3], PARAMETER["central_meridian",-90.15], PARAMETER["scale_factor",1.00002], PARAMETER["false_easting",1749860.2997206], PARAMETER["false_northing",840030.48006096]
Definition: OGC Well Known Text 2 (2019)
CONVERSION["Illinois Coordinate System of 1983 Carlinville zone (US survey foot)", METHOD["Lambert Conic Conformal (1SP)", ID["EPSG",9801]], PARAMETER["Latitude of natural origin",39.3, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-90.15, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",1.00002, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",5741000, LENGTHUNIT["US survey foot",0.304800609601219], ID["EPSG",8806]], PARAMETER["False northing",2756000, LENGTHUNIT["US survey foot",0.304800609601219], ID["EPSG",8807]], ID["EPSG",11255]]
Definition: ESRI Well Known Text
PROJECTION["Lambert_Conformal_Conic"], PARAMETER["False_Easting",1749860.2997206], PARAMETER["False_Northing",840030.48006096], PARAMETER["Central_Meridian",-90.15], PARAMETER["Standard_Parallel_1",39.3], PARAMETER["Scale_Factor",1.00002], PARAMETER["Latitude_Of_Origin",39.3]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Conversion", "name": "Illinois Coordinate System of 1983 Carlinville zone (US survey foot)", "method": { "name": "Lambert Conic Conformal (1SP)", "id": { "authority": "EPSG", "code": 9801 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 39.3, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": -90.15, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 1.00002, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 5741000, "unit": { "type": "LinearUnit", "name": "US survey foot", "conversion_factor": 0.304800609601219 }, "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 2756000, "unit": { "type": "LinearUnit", "name": "US survey foot", "conversion_factor": 0.304800609601219 }, "id": { "authority": "EPSG", "code": 8807 } } ], "id": { "authority": "EPSG", "code": 11255 } }
Definition: GeoServer
11255=PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",39.3],PARAMETER["central_meridian",-90.15],PARAMETER["scale_factor",1.00002],PARAMETER["false_easting",1749860.2997206],PARAMETER["false_northing",840030.48006096]
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=lcc +lat_1=39.3 +lat_0=39.3 +lon_0=-90.15 +k_0=1.00002 +x_0=1749860.2997206 +y_0=840030.48006096"> <Layer srs="+proj=lcc +lat_1=39.3 +lat_0=39.3 +lon_0=-90.15 +k_0=1.00002 +x_0=1749860.2997206 +y_0=840030.48006096"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 11255, 'EPSG', 11255, '+proj=lcc +lat_1=39.3 +lat_0=39.3 +lon_0=-90.15 +k_0=1.00002 +x_0=1749860.2997206 +y_0=840030.48006096', 'PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",39.3],PARAMETER["central_meridian",-90.15],PARAMETER["scale_factor",1.00002],PARAMETER["false_easting",1749860.2997206],PARAMETER["false_northing",840030.48006096]');