EPSG:2136

Accra / Ghana National Grid

Transform Get position on a map

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

Selected transformation

Method: Geocentric translations (geog2D domain)

Remarks: Derived at 4 stations. Accuracy 3m, 4m and 3m in X, Y and Z axes.

Information source: US NGA GeoTrans software v3.4 and NGA Standard 0036 v1.0.0 of 2014-07-08.

Revision date: 2020-03-14

Attributes

Unit: Gold Coast foot

Geodetic CRS: Accra

Datum: Accra

Ellipsoid: War Office

Prime meridian: Greenwich

Data source: EPSG

Information source: Ordnance Survey International

Revision date: 2023-11-19

Scope: Engineering survey, topographic mapping.

Remarks: Ellipsoid semi-major axis (a)=20926201 Gold Coast feet. ProjCRS sometimes found in metric form: 1 Gold Coast foot = 0.3047997101815 m. Replaced by Leigon / Ghana Metric Grid from 1978.

Area of use: Ghana - onshore.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: ftGC.

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SimpleMap

Center coordinates
896284.74 1177251.24

Projected bounds:
80855.66 184.56
1711663.28 2357568.2

WGS84 bounds:
-3.25 4.67
1.23 11.16

Ghana - onshore.
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Definition: OGC Well Known Text

PROJCS["Accra / Ghana National Grid",
    GEOGCS["Accra",
        DATUM["Accra",
            SPHEROID["War Office",6378300,296],
            TOWGS84[-170,33,326,0,0,0,0]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4168"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",4.66666666666667],
    PARAMETER["central_meridian",-1],
    PARAMETER["scale_factor",0.99975],
    PARAMETER["false_easting",900000],
    PARAMETER["false_northing",0],
    UNIT["Gold Coast foot",0.304799710181509],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","2136"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["Accra / Ghana National Grid",
    BASEGEOGCRS["Accra",
        DATUM["Accra",
            ELLIPSOID["War Office",6378300,296,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4168]],
    CONVERSION["Ghana National Grid",
        METHOD["Transverse Mercator",
            ID["EPSG",9807]],
        PARAMETER["Latitude of natural origin",4.66666666666667,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",-1,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",0.99975,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",900000,
            LENGTHUNIT["Gold Coast foot",0.304799710181509],
            ID["EPSG",8806]],
        PARAMETER["False northing",0,
            LENGTHUNIT["Gold Coast foot",0.304799710181509],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["(E)",east,
            ORDER[1],
            LENGTHUNIT["Gold Coast foot",0.304799710181509]],
        AXIS["(N)",north,
            ORDER[2],
            LENGTHUNIT["Gold Coast foot",0.304799710181509]],
    USAGE[
        SCOPE["Engineering survey, topographic mapping."],
        AREA["Ghana - onshore."],
        BBOX[4.67,-3.25,11.16,1.23]],
    ID["EPSG",2136]]

Definition: ESRI Well Known Text

PROJCS["Accra_Ghana_Grid",
    GEOGCS["GCS_Accra",
        DATUM["D_Accra",
            SPHEROID["War_Office",6378300.0,296.0]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",900000.0],
    PARAMETER["False_Northing",0.0],
    PARAMETER["Central_Meridian",-1.0],
    PARAMETER["Scale_Factor",0.99975],
    PARAMETER["Latitude_Of_Origin",4.66666666666667],
    UNIT["Gold Coast foot",0.304799710181509]]

Definition: PROJ.4

+proj=tmerc +lat_0=4.66666666666667 +lon_0=-1 +k=0.99975 +x_0=274319.739163358 +y_0=0 +a=6378300 +rf=296 +towgs84=-170,33,326,0,0,0,0 +to_meter=0.304799710181509 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:2136","+proj=tmerc +lat_0=4.66666666666667 +lon_0=-1 +k=0.99975 +x_0=274319.739163358 +y_0=0 +a=6378300 +rf=296 +towgs84=-170,33,326,0,0,0,0 +to_meter=0.304799710181509 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Accra / Ghana National Grid",
    "base_crs": {
        "name": "Accra",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Accra",
            "ellipsoid": {
                "name": "War Office",
                "semi_major_axis": 6378300,
                "inverse_flattening": 296
            }
        },
        "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": 4168
        }
    },
    "conversion": {
        "name": "Ghana National Grid",
        "method": {
            "name": "Transverse Mercator",
            "id": {
                "authority": "EPSG",
                "code": 9807
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 4.66666666666667,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": -1,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "Scale factor at natural origin",
                "value": 0.99975,
                "unit": "unity",
                "id": {
                    "authority": "EPSG",
                    "code": 8805
                }
            },
            {
                "name": "False easting",
                "value": 900000,
                "unit": {
                    "type": "LinearUnit",
                    "name": "Gold Coast foot",
                    "conversion_factor": 0.304799710181509
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 0,
                "unit": {
                    "type": "LinearUnit",
                    "name": "Gold Coast foot",
                    "conversion_factor": 0.304799710181509
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8807
                }
            }
        ]
    },
    "coordinate_system": {
        "subtype": "Cartesian",
        "axis": [
            {
                "name": "Easting",
                "abbreviation": "E",
                "direction": "east",
                "unit": {
                    "type": "LinearUnit",
                    "name": "Gold Coast foot",
                    "conversion_factor": 0.304799710181509
                }
            },
            {
                "name": "Northing",
                "abbreviation": "N",
                "direction": "north",
                "unit": {
                    "type": "LinearUnit",
                    "name": "Gold Coast foot",
                    "conversion_factor": 0.304799710181509
                }
            }
        ]
    },
    "scope": "Engineering survey, topographic mapping.",
    "area": "Ghana - onshore.",
    "bbox": {
        "south_latitude": 4.67,
        "west_longitude": -3.25,
        "north_latitude": 11.16,
        "east_longitude": 1.23
    },
    "id": {
        "authority": "EPSG",
        "code": 2136
    }
}

Definition: GeoServer

2136=PROJCS["Accra / Ghana National Grid",GEOGCS["Accra",DATUM["Accra",SPHEROID["War Office",6378300,296],TOWGS84[-170,33,326,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4168"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",4.66666666666667],PARAMETER["central_meridian",-1],PARAMETER["scale_factor",0.99975],PARAMETER["false_easting",900000],PARAMETER["false_northing",0],UNIT["Gold Coast foot",0.304799710181509],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","2136"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=4.66666666666667"
	"lon_0=-1"
	"k=0.99975"
	"x_0=274319.739163358"
	"y_0=0"
	"a=6378300"
	"rf=296"
	"towgs84=-170,33,326,0,0,0,0"
	"to_meter=0.304799710181509"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=4.66666666666667 +lon_0=-1 +k=0.99975 +x_0=274319.739163358 +y_0=0 +a=6378300 +rf=296 +towgs84=-170,33,326,0,0,0,0 +to_meter=0.304799710181509 +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=4.66666666666667 +lon_0=-1 +k=0.99975 +x_0=274319.739163358 +y_0=0 +a=6378300 +rf=296 +towgs84=-170,33,326,0,0,0,0 +to_meter=0.304799710181509 +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 2136, 'EPSG', 2136, '+proj=tmerc +lat_0=4.66666666666667 +lon_0=-1 +k=0.99975 +x_0=274319.739163358 +y_0=0 +a=6378300 +rf=296 +towgs84=-170,33,326,0,0,0,0 +to_meter=0.304799710181509 +no_defs +type=crs', 'PROJCS["Accra / Ghana National Grid",GEOGCS["Accra",DATUM["Accra",SPHEROID["War Office",6378300,296],TOWGS84[-170,33,326,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4168"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",4.66666666666667],PARAMETER["central_meridian",-1],PARAMETER["scale_factor",0.99975],PARAMETER["false_easting",900000],PARAMETER["false_northing",0],UNIT["Gold Coast foot",0.304799710181509],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","2136"]]');