EPSG:25000

Leigon / Ghana Metre Grid

Transform Get position on a map

Available transformations
to EPSG:4326
No other targets exist for this CRS

  • Ghana - onshore and offshore. , accuracy 5.0 m, code 1159 (default) [3]

Selected transformation

Method: Geocentric translations (geog2D domain)

Remarks: Derived at 8 stations. Accuracy 2m, 3m and 2m in X, Y and Z axes.

Information source: U.S. Defense Mapping Agency TR8350.2 revision of August 1993.

Revision date: 2020-03-14

Attributes

Unit: metre

Geodetic CRS: Leigon

Datum: Leigon

Ellipsoid: Clarke 1880 (RGS)

Prime meridian: Greenwich

Data source: EPSG

Revision date: 1995-06-02

Scope: Engineering survey, topographic mapping.

Remarks: Replaced Accra / Ghana National Grid (code 2136) in 1978.

Area of use: Ghana - onshore and offshore.

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

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SimpleMap

Center coordinates
291440.24 178051.08

Projected bounds:
-36241.85 -361446.65
619363.47 719420.59

WGS84 bounds:
-3.79 1.4
2.1 11.16

Ghana - onshore and offshore.
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Definition: OGC Well Known Text

PROJCS["Leigon / Ghana Metre Grid",
    GEOGCS["Leigon",
        DATUM["Leigon",
            SPHEROID["Clarke 1880 (RGS)",6378249.145,293.465],
            TOWGS84[-130,29,364,0,0,0,0]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4250"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",4.66666666666667],
    PARAMETER["central_meridian",-1],
    PARAMETER["scale_factor",0.99975],
    PARAMETER["false_easting",274319.51],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","25000"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["Leigon / Ghana Metre Grid",
    BASEGEOGCRS["Leigon",
        DATUM["Leigon",
            ELLIPSOID["Clarke 1880 (RGS)",6378249.145,293.465,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4250]],
    CONVERSION["Ghana Metre 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",274319.51,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["(E)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["(N)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Engineering survey, topographic mapping."],
        AREA["Ghana - onshore and offshore."],
        BBOX[1.4,-3.79,11.16,2.1]],
    ID["EPSG",25000]]

Definition: ESRI Well Known Text

PROJCS["Ghana_Metre_Grid",
    GEOGCS["GCS_Leigon",
        DATUM["D_Leigon",
            SPHEROID["Clarke_1880_RGS",6378249.145,293.465]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",274319.51],
    PARAMETER["False_Northing",0.0],
    PARAMETER["Central_Meridian",-1.0],
    PARAMETER["Scale_Factor",0.99975],
    PARAMETER["Latitude_Of_Origin",4.66666666666667],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=tmerc +lat_0=4.66666666666667 +lon_0=-1 +k=0.99975 +x_0=274319.51 +y_0=0 +a=6378249.145 +rf=293.465 +towgs84=-130,29,364,0,0,0,0 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:25000","+proj=tmerc +lat_0=4.66666666666667 +lon_0=-1 +k=0.99975 +x_0=274319.51 +y_0=0 +a=6378249.145 +rf=293.465 +towgs84=-130,29,364,0,0,0,0 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Leigon / Ghana Metre Grid",
    "base_crs": {
        "name": "Leigon",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Leigon",
            "ellipsoid": {
                "name": "Clarke 1880 (RGS)",
                "semi_major_axis": 6378249.145,
                "inverse_flattening": 293.465
            }
        },
        "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": 4250
        }
    },
    "conversion": {
        "name": "Ghana Metre 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": 274319.51,
                "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": "E",
                "direction": "east",
                "unit": "metre"
            },
            {
                "name": "Northing",
                "abbreviation": "N",
                "direction": "north",
                "unit": "metre"
            }
        ]
    },
    "scope": "Engineering survey, topographic mapping.",
    "area": "Ghana - onshore and offshore.",
    "bbox": {
        "south_latitude": 1.4,
        "west_longitude": -3.79,
        "north_latitude": 11.16,
        "east_longitude": 2.1
    },
    "id": {
        "authority": "EPSG",
        "code": 25000
    }
}

Definition: GeoServer

25000=PROJCS["Leigon / Ghana Metre Grid",GEOGCS["Leigon",DATUM["Leigon",SPHEROID["Clarke 1880 (RGS)",6378249.145,293.465],TOWGS84[-130,29,364,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4250"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",4.66666666666667],PARAMETER["central_meridian",-1],PARAMETER["scale_factor",0.99975],PARAMETER["false_easting",274319.51],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","25000"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=4.66666666666667"
	"lon_0=-1"
	"k=0.99975"
	"x_0=274319.51"
	"y_0=0"
	"a=6378249.145"
	"rf=293.465"
	"towgs84=-130,29,364,0,0,0,0"
	"units=m"
	"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=274319.51 +y_0=0 +a=6378249.145 +rf=293.465 +towgs84=-130,29,364,0,0,0,0 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=4.66666666666667 +lon_0=-1 +k=0.99975 +x_0=274319.51 +y_0=0 +a=6378249.145 +rf=293.465 +towgs84=-130,29,364,0,0,0,0 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 25000, 'EPSG', 25000, '+proj=tmerc +lat_0=4.66666666666667 +lon_0=-1 +k=0.99975 +x_0=274319.51 +y_0=0 +a=6378249.145 +rf=293.465 +towgs84=-130,29,364,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["Leigon / Ghana Metre Grid",GEOGCS["Leigon",DATUM["Leigon",SPHEROID["Clarke 1880 (RGS)",6378249.145,293.465],TOWGS84[-130,29,364,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4250"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",4.66666666666667],PARAMETER["central_meridian",-1],PARAMETER["scale_factor",0.99975],PARAMETER["false_easting",274319.51],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","25000"]]');