EPSG:2791

NAD83(HARN) / Illinois West

Transform Get position on a map

Available transformations
to EPSG:4326
EPSG:4326 - WGS 84

Selected transformation

Method: Coordinate Frame rotation (geog2D domain)

Remarks: Approximation derived from tfm code 6864 ignoring time-dependent parameters and assuming ITRF96(1997.0) and WGS 84, plus NAD83(CORS96) and NAD83(HARN), can be considered the same within the accuracy of the tfm. In USA only replaces tfm code 1900.

Information source: http://www.ngs.noaa.gov/CORS/Derivation.html

Revision date: 2021-09-08

Attributes

Unit: metre

Geodetic CRS: NAD83(HARN)

Datum: NAD83 (High Accuracy Reference Network)

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

Information source: National Geodetic Survey

Revision date: 2007-04-20

Scope: Engineering survey, topographic mapping.

Remarks: State law defines system in US survey feet. See code 3444 for equivalent non-metric definition. Replaces NAD83 / SPCS for applications with an accuracy of better than 1m. Replaced by NAD83(NSRS2007) / SPCS.

Area of use: United States (USA) - Illinois - counties of Adams; Alexander; Bond; Brown; Bureau; Calhoun; Carroll; Cass; Christian; Clinton; Fulton; Greene; Hancock; Henderson; Henry; Jackson; Jersey; Jo Daviess; Knox; Lee; Logan; Macoupin; Madison; Marshall; Mason; McDonough; Menard; Mercer; Monroe; Montgomery; Morgan; Ogle; Peoria; Perry; Pike; Pulaski; Putnam; Randolph; Rock Island; Sangamon; Schuyler; Scott; St Clair; Stark; Stephenson; Tazewell; Union; Warren; Washington; Whiteside; Winnebago; Woodford.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: m.

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SimpleMap

Center coordinates
193219.77 40453.94

Projected bounds:
-2956055.4 -1358675.06
3102109.31 2015266.12

WGS84 bounds:
-124.79 24.41
-66.91 49.38

United States (USA) - CONUS onshore - Alabama; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming.
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Definition: OGC Well Known Text

PROJCS["NAD83(HARN) / Illinois West",
    GEOGCS["NAD83(HARN)",
        DATUM["NAD83_High_Accuracy_Reference_Network",
            SPHEROID["GRS 1980",6378137,298.257222101],
            TOWGS84[-0.991,1.9072,0.5129,-1.25033E-07,-4.6785E-08,-5.6529E-08,0]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4152"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",36.6666666666667],
    PARAMETER["central_meridian",-90.1666666666667],
    PARAMETER["scale_factor",0.999941177],
    PARAMETER["false_easting",700000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","2791"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["NAD83(HARN) / Illinois West",
    BASEGEOGCRS["NAD83(HARN)",
        DATUM["NAD83 (High Accuracy Reference Network)",
            ELLIPSOID["GRS 1980",6378137,298.257222101,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4152]],
    CONVERSION["SPCS83 Illinois West zone (meter)",
        METHOD["Transverse Mercator",
            ID["EPSG",9807]],
        PARAMETER["Latitude of natural origin",36.6666666666667,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",-90.1666666666667,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",0.999941177,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",700000,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["easting (X)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["northing (Y)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Engineering survey, topographic mapping."],
        AREA["United States (USA) - Illinois - counties of Adams; Alexander; Bond; Brown; Bureau; Calhoun; Carroll; Cass; Christian; Clinton; Fulton; Greene; Hancock; Henderson; Henry; Jackson; Jersey; Jo Daviess; Knox; Lee; Logan; Macoupin; Madison; Marshall; Mason; McDonough; Menard; Mercer; Monroe; Montgomery; Morgan; Ogle; Peoria; Perry; Pike; Pulaski; Putnam; Randolph; Rock Island; Sangamon; Schuyler; Scott; St Clair; Stark; Stephenson; Tazewell; Union; Warren; Washington; Whiteside; Winnebago; Woodford."],
        BBOX[36.97,-91.52,42.51,-88.92]],
    ID["EPSG",2791]]

Definition: ESRI Well Known Text

PROJCS["NAD_1983_HARN_StatePlane_Illinois_West_FIPS_1202",
    GEOGCS["GCS_North_American_1983_HARN",
        DATUM["D_North_American_1983_HARN",
            SPHEROID["GRS_1980",6378137.0,298.257222101]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",700000.0],
    PARAMETER["False_Northing",0.0],
    PARAMETER["Central_Meridian",-90.1666666666667],
    PARAMETER["Scale_Factor",0.999941177],
    PARAMETER["Latitude_Of_Origin",36.6666666666667],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=tmerc +lat_0=36.6666666666667 +lon_0=-90.1666666666667 +k=0.999941177 +x_0=700000 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:2791","+proj=tmerc +lat_0=36.6666666666667 +lon_0=-90.1666666666667 +k=0.999941177 +x_0=700000 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "NAD83(HARN) / Illinois West",
    "base_crs": {
        "name": "NAD83(HARN)",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "NAD83 (High Accuracy Reference Network)",
            "ellipsoid": {
                "name": "GRS 1980",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257222101
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4152
        }
    },
    "conversion": {
        "name": "SPCS83 Illinois West zone (meter)",
        "method": {
            "name": "Transverse Mercator",
            "id": {
                "authority": "EPSG",
                "code": 9807
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 36.6666666666667,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": -90.1666666666667,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "Scale factor at natural origin",
                "value": 0.999941177,
                "unit": "unity",
                "id": {
                    "authority": "EPSG",
                    "code": 8805
                }
            },
            {
                "name": "False easting",
                "value": 700000,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 0,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8807
                }
            }
        ]
    },
    "coordinate_system": {
        "subtype": "Cartesian",
        "axis": [
            {
                "name": "Easting",
                "abbreviation": "X",
                "direction": "east",
                "unit": "metre"
            },
            {
                "name": "Northing",
                "abbreviation": "Y",
                "direction": "north",
                "unit": "metre"
            }
        ]
    },
    "scope": "Engineering survey, topographic mapping.",
    "area": "United States (USA) - Illinois - counties of Adams; Alexander; Bond; Brown; Bureau; Calhoun; Carroll; Cass; Christian; Clinton; Fulton; Greene; Hancock; Henderson; Henry; Jackson; Jersey; Jo Daviess; Knox; Lee; Logan; Macoupin; Madison; Marshall; Mason; McDonough; Menard; Mercer; Monroe; Montgomery; Morgan; Ogle; Peoria; Perry; Pike; Pulaski; Putnam; Randolph; Rock Island; Sangamon; Schuyler; Scott; St Clair; Stark; Stephenson; Tazewell; Union; Warren; Washington; Whiteside; Winnebago; Woodford.",
    "bbox": {
        "south_latitude": 36.97,
        "west_longitude": -91.52,
        "north_latitude": 42.51,
        "east_longitude": -88.92
    },
    "id": {
        "authority": "EPSG",
        "code": 2791
    }
}

Definition: GeoServer

2791=PROJCS["NAD83(HARN) / Illinois West",GEOGCS["NAD83(HARN)",DATUM["NAD83_High_Accuracy_Reference_Network",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[-0.991,1.9072,0.5129,-1.25033E-07,-4.6785E-08,-5.6529E-08,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4152"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",36.6666666666667],PARAMETER["central_meridian",-90.1666666666667],PARAMETER["scale_factor",0.999941177],PARAMETER["false_easting",700000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","2791"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=36.6666666666667"
	"lon_0=-90.1666666666667"
	"k=0.999941177"
	"x_0=700000"
	"y_0=0"
	"ellps=GRS80"
	"towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=36.6666666666667 +lon_0=-90.1666666666667 +k=0.999941177 +x_0=700000 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=36.6666666666667 +lon_0=-90.1666666666667 +k=0.999941177 +x_0=700000 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 2791, 'EPSG', 2791, '+proj=tmerc +lat_0=36.6666666666667 +lon_0=-90.1666666666667 +k=0.999941177 +x_0=700000 +y_0=0 +ellps=GRS80 +towgs84=-0.991,1.9072,0.5129,-1.25033e-07,-4.6785e-08,-5.6529e-08,0 +units=m +no_defs +type=crs', 'PROJCS["NAD83(HARN) / Illinois West",GEOGCS["NAD83(HARN)",DATUM["NAD83_High_Accuracy_Reference_Network",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[-0.991,1.9072,0.5129,-1.25033E-07,-4.6785E-08,-5.6529E-08,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4152"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",36.6666666666667],PARAMETER["central_meridian",-90.1666666666667],PARAMETER["scale_factor",0.999941177],PARAMETER["false_easting",700000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","2791"]]');