EPSG:31028

Yoff / UTM zone 28N

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 7 stations. Accuracy 3m in each axis.

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: metre

Geodetic CRS: Yoff

Datum: Yoff

Ellipsoid: Clarke 1880 (IGN)

Prime meridian: Greenwich

Data source: EPSG

Revision date: 1995-06-02

Scope: Engineering survey, topographic mapping.

Area of use: Senegal - 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
414388.33 1511289.94

Projected bounds:
-71855.28 1176092.8
898200.58 1853598.42

WGS84 bounds:
-20.22 10.64
-11.36 16.7

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

PROJCS["Yoff / UTM zone 28N",
    GEOGCS["Yoff",
        DATUM["Yoff",
            SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627],
            TOWGS84[-30,190,89,0,0,0,0]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4310"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-15],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","31028"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["Yoff / UTM zone 28N",
    BASEGEOGCRS["Yoff",
        DATUM["Yoff",
            ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4310]],
    CONVERSION["UTM zone 28N",
        METHOD["Transverse Mercator",
            ID["EPSG",9807]],
        PARAMETER["Latitude of natural origin",0,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",-15,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",0.9996,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",500000,
            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["Senegal - onshore and offshore."],
        BBOX[10.64,-20.22,16.7,-11.36]],
    ID["EPSG",31028]]

Definition: ESRI Well Known Text

PROJCS["Yoff_1972_UTM_Zone_28N",
    GEOGCS["GCS_Yoff",
        DATUM["D_Yoff",
            SPHEROID["Clarke_1880_IGN",6378249.2,293.466021293627]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",500000.0],
    PARAMETER["False_Northing",0.0],
    PARAMETER["Central_Meridian",-15.0],
    PARAMETER["Scale_Factor",0.9996],
    PARAMETER["Latitude_Of_Origin",0.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=utm +zone=28 +ellps=clrk80ign +towgs84=-30,190,89,0,0,0,0 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:31028","+proj=utm +zone=28 +ellps=clrk80ign +towgs84=-30,190,89,0,0,0,0 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Yoff / UTM zone 28N",
    "base_crs": {
        "name": "Yoff",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Yoff",
            "ellipsoid": {
                "name": "Clarke 1880 (IGN)",
                "semi_major_axis": 6378249.2,
                "inverse_flattening": 293.466021293627
            }
        },
        "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": 4310
        }
    },
    "conversion": {
        "name": "UTM zone 28N",
        "method": {
            "name": "Transverse Mercator",
            "id": {
                "authority": "EPSG",
                "code": 9807
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 0,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": -15,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "Scale factor at natural origin",
                "value": 0.9996,
                "unit": "unity",
                "id": {
                    "authority": "EPSG",
                    "code": 8805
                }
            },
            {
                "name": "False easting",
                "value": 500000,
                "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": "Senegal - onshore and offshore.",
    "bbox": {
        "south_latitude": 10.64,
        "west_longitude": -20.22,
        "north_latitude": 16.7,
        "east_longitude": -11.36
    },
    "id": {
        "authority": "EPSG",
        "code": 31028
    }
}

Definition: GeoServer

31028=PROJCS["Yoff / UTM zone 28N",GEOGCS["Yoff",DATUM["Yoff",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627],TOWGS84[-30,190,89,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4310"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-15],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","31028"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=utm"
	"zone=28"
	"ellps=clrk80ign"
	"towgs84=-30,190,89,0,0,0,0"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=utm +zone=28 +ellps=clrk80ign +towgs84=-30,190,89,0,0,0,0 +units=m +no_defs +type=crs">
	<Layer srs="+proj=utm +zone=28 +ellps=clrk80ign +towgs84=-30,190,89,0,0,0,0 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 31028, 'EPSG', 31028, '+proj=utm +zone=28 +ellps=clrk80ign +towgs84=-30,190,89,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["Yoff / UTM zone 28N",GEOGCS["Yoff",DATUM["Yoff",SPHEROID["Clarke 1880 (IGN)",6378249.2,293.466021293627],TOWGS84[-30,190,89,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4310"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-15],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","31028"]]');