EPSG:11234

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

Attributes

Data source: EPSG

Information source: Guide to the Illinois State Plane Coordinate System, https://clearinghouse.isgs.illinois.edu

Revision date: 2023-02-02

Scope: Engineering survey, topographic mapping (large and medium scale).

Remarks: Part of the ICS83 33-zone system. Longitude of origin also given by information source as 272°12'E. State law defines grid unit as US survey foot. No equivalent metric definition.

Method: Transverse Mercator

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

Description: (0,)

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United States (USA) - Illinois - counties of Cook, DuPage and Lake.

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Definition: OGC Well Known Text

PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",41.25],
PARAMETER["central_meridian",-87.8],
PARAMETER["scale_factor",1.000023],
PARAMETER["false_easting",1449936.499873],
PARAMETER["false_northing",149961.8999238]

Definition: OGC Well Known Text 2 (2019)

CONVERSION["Illinois Coordinate System of 1983 Chicago zone (US survey foot)",
    METHOD["Transverse Mercator",
        ID["EPSG",9807]],
    PARAMETER["Latitude of natural origin",41.25,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8801]],
    PARAMETER["Longitude of natural origin",-87.8,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8802]],
    PARAMETER["Scale factor at natural origin",1.000023,
        SCALEUNIT["unity",1],
        ID["EPSG",8805]],
    PARAMETER["False easting",4757000,
        LENGTHUNIT["US survey foot",0.304800609601219],
        ID["EPSG",8806]],
    PARAMETER["False northing",492000,
        LENGTHUNIT["US survey foot",0.304800609601219],
        ID["EPSG",8807]],
    ID["EPSG",11234]]

Definition: ESRI Well Known Text

PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting",1449936.499873],
PARAMETER["False_Northing",149961.8999238],
PARAMETER["Central_Meridian",-87.8],
PARAMETER["Scale_Factor",1.000023],
PARAMETER["Latitude_Of_Origin",41.25]

Definition: PROJ.4

+proj=tmerc +lat_0=41.25 +lon_0=-87.8 +k=1.000023 +x_0=1449936.499873 +y_0=149961.8999238

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:11234","+proj=tmerc +lat_0=41.25 +lon_0=-87.8 +k=1.000023 +x_0=1449936.499873 +y_0=149961.8999238");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Conversion",
    "name": "Illinois Coordinate System of 1983 Chicago zone (US survey foot)",
    "method": {
        "name": "Transverse Mercator",
        "id": {
            "authority": "EPSG",
            "code": 9807
        }
    },
    "parameters": [
        {
            "name": "Latitude of natural origin",
            "value": 41.25,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8801
            }
        },
        {
            "name": "Longitude of natural origin",
            "value": -87.8,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8802
            }
        },
        {
            "name": "Scale factor at natural origin",
            "value": 1.000023,
            "unit": "unity",
            "id": {
                "authority": "EPSG",
                "code": 8805
            }
        },
        {
            "name": "False easting",
            "value": 4757000,
            "unit": {
                "type": "LinearUnit",
                "name": "US survey foot",
                "conversion_factor": 0.304800609601219
            },
            "id": {
                "authority": "EPSG",
                "code": 8806
            }
        },
        {
            "name": "False northing",
            "value": 492000,
            "unit": {
                "type": "LinearUnit",
                "name": "US survey foot",
                "conversion_factor": 0.304800609601219
            },
            "id": {
                "authority": "EPSG",
                "code": 8807
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 11234
    }
}

Definition: GeoServer

11234=PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",41.25],PARAMETER["central_meridian",-87.8],PARAMETER["scale_factor",1.000023],PARAMETER["false_easting",1449936.499873],PARAMETER["false_northing",149961.8999238]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=41.25"
	"lon_0=-87.8"
	"k=1.000023"
	"x_0=1449936.499873"
	"y_0=149961.8999238"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=41.25 +lon_0=-87.8 +k=1.000023 +x_0=1449936.499873 +y_0=149961.8999238">
	<Layer srs="+proj=tmerc +lat_0=41.25 +lon_0=-87.8 +k=1.000023 +x_0=1449936.499873 +y_0=149961.8999238">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 11234, 'EPSG', 11234, '+proj=tmerc +lat_0=41.25 +lon_0=-87.8 +k=1.000023 +x_0=1449936.499873 +y_0=149961.8999238', 'PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",41.25],PARAMETER["central_meridian",-87.8],PARAMETER["scale_factor",1.000023],PARAMETER["false_easting",1449936.499873],PARAMETER["false_northing",149961.8999238]');