EPSG:11261

Illinois Coordinate System of 1983 Olney 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 271°51'E. State law defines grid unit as US survey foot. No equivalent metric definition.

Method: Lambert Conic Conformal (1SP)

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

Description: (0,)

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United States (USA) - Illinois - counties of Clay, Edwards, Lawrence, Richland, Wabash and Wayne.

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Definition: OGC Well Known Text

PROJECTION["Lambert_Conformal_Conic_1SP"],
PARAMETER["latitude_of_origin",38.55],
PARAMETER["central_meridian",-88.15],
PARAMETER["scale_factor",1.000013],
PARAMETER["false_easting",380086.36017272],
PARAMETER["false_northing",1150012.7000254]

Definition: OGC Well Known Text 2 (2019)

CONVERSION["Illinois Coordinate System of 1983 Olney zone (US survey foot)",
    METHOD["Lambert Conic Conformal (1SP)",
        ID["EPSG",9801]],
    PARAMETER["Latitude of natural origin",38.55,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8801]],
    PARAMETER["Longitude of natural origin",-88.15,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8802]],
    PARAMETER["Scale factor at natural origin",1.000013,
        SCALEUNIT["unity",1],
        ID["EPSG",8805]],
    PARAMETER["False easting",1247000,
        LENGTHUNIT["US survey foot",0.304800609601219],
        ID["EPSG",8806]],
    PARAMETER["False northing",3773000,
        LENGTHUNIT["US survey foot",0.304800609601219],
        ID["EPSG",8807]],
    ID["EPSG",11261]]

Definition: ESRI Well Known Text

PROJECTION["Lambert_Conformal_Conic"],
PARAMETER["False_Easting",380086.36017272],
PARAMETER["False_Northing",1150012.7000254],
PARAMETER["Central_Meridian",-88.15],
PARAMETER["Standard_Parallel_1",38.55],
PARAMETER["Scale_Factor",1.000013],
PARAMETER["Latitude_Of_Origin",38.55]

Definition: PROJ.4

+proj=lcc +lat_1=38.55 +lat_0=38.55 +lon_0=-88.15 +k_0=1.000013 +x_0=380086.36017272 +y_0=1150012.7000254

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:11261","+proj=lcc +lat_1=38.55 +lat_0=38.55 +lon_0=-88.15 +k_0=1.000013 +x_0=380086.36017272 +y_0=1150012.7000254");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Conversion",
    "name": "Illinois Coordinate System of 1983 Olney zone (US survey foot)",
    "method": {
        "name": "Lambert Conic Conformal (1SP)",
        "id": {
            "authority": "EPSG",
            "code": 9801
        }
    },
    "parameters": [
        {
            "name": "Latitude of natural origin",
            "value": 38.55,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8801
            }
        },
        {
            "name": "Longitude of natural origin",
            "value": -88.15,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8802
            }
        },
        {
            "name": "Scale factor at natural origin",
            "value": 1.000013,
            "unit": "unity",
            "id": {
                "authority": "EPSG",
                "code": 8805
            }
        },
        {
            "name": "False easting",
            "value": 1247000,
            "unit": {
                "type": "LinearUnit",
                "name": "US survey foot",
                "conversion_factor": 0.304800609601219
            },
            "id": {
                "authority": "EPSG",
                "code": 8806
            }
        },
        {
            "name": "False northing",
            "value": 3773000,
            "unit": {
                "type": "LinearUnit",
                "name": "US survey foot",
                "conversion_factor": 0.304800609601219
            },
            "id": {
                "authority": "EPSG",
                "code": 8807
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 11261
    }
}

Definition: GeoServer

11261=PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",38.55],PARAMETER["central_meridian",-88.15],PARAMETER["scale_factor",1.000013],PARAMETER["false_easting",380086.36017272],PARAMETER["false_northing",1150012.7000254]

Definition: MapServer - MAPfile

PROJECTION
	"proj=lcc"
	"lat_1=38.55"
	"lat_0=38.55"
	"lon_0=-88.15"
	"k_0=1.000013"
	"x_0=380086.36017272"
	"y_0=1150012.7000254"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=lcc +lat_1=38.55 +lat_0=38.55 +lon_0=-88.15 +k_0=1.000013 +x_0=380086.36017272 +y_0=1150012.7000254">
	<Layer srs="+proj=lcc +lat_1=38.55 +lat_0=38.55 +lon_0=-88.15 +k_0=1.000013 +x_0=380086.36017272 +y_0=1150012.7000254">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 11261, 'EPSG', 11261, '+proj=lcc +lat_1=38.55 +lat_0=38.55 +lon_0=-88.15 +k_0=1.000013 +x_0=380086.36017272 +y_0=1150012.7000254', 'PROJECTION["Lambert_Conformal_Conic_1SP"],PARAMETER["latitude_of_origin",38.55],PARAMETER["central_meridian",-88.15],PARAMETER["scale_factor",1.000013],PARAMETER["false_easting",380086.36017272],PARAMETER["false_northing",1150012.7000254]');