EPSG:22291

Cape / Lo31

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

Selected transformation

Method: Geocentric translations (geog2D domain)

Remarks: Derived at 5 stations. Accuracy 3m, 6m and 6m in X, Y and Z axes.

Information source: U.S. Defense Mapping Agency TR8350.2 September 1987.

Revision date: 2020-03-14

Attributes

Unit: metre

Geodetic CRS: Cape

Datum: Cape

Ellipsoid: Clarke 1880 (Arc)

Prime meridian: Greenwich

Data source: EPSG

Information source: Directorate of Surveys and Mapping, Mowbray, South Africa.

Revision date: 2007-02-12

Scope: Cadastre, engineering survey, topographic mapping (large and medium scale).

Area of use: South Africa - onshore between 30°E and 32°E. Eswatini (Swaziland).

Coordinate system: Cartesian 2D CS. Axes: westing, southing (Y,X). Orientations: west, south. UoM: m.

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SimpleMap

Center coordinates
617427.97 3170353.24

Projected bounds:
-201228.11 2447927.51
1512786.39 3959179.46

WGS84 bounds:
16.45 -34.88
32.95 -22.13

South Africa - mainland onshore.
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Definition: OGC Well Known Text

PROJCS["Cape / Lo31",
    GEOGCS["Cape",
        DATUM["Cape",
            SPHEROID["Clarke 1880 (Arc)",6378249.145,293.4663077],
            TOWGS84[-136,-108,-292,0,0,0,0]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4222"]],
    PROJECTION["Transverse_Mercator_South_Orientated"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",31],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","22291"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["Cape / Lo31",
    BASEGEOGCRS["Cape",
        DATUM["Cape",
            ELLIPSOID["Clarke 1880 (Arc)",6378249.145,293.4663077,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4222]],
    CONVERSION["South African Survey Grid zone 31",
        METHOD["Transverse Mercator (South Orientated)",
            ID["EPSG",9808]],
        PARAMETER["Latitude of natural origin",0,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",31,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",1,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["westing (Y)",west,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["southing (X)",south,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Cadastre, engineering survey, topographic mapping (large and medium scale)."],
        AREA["South Africa - onshore between 30°E and 32°E. Eswatini (Swaziland)."],
        BBOX[-31.38,29.99,-22.22,32.02]],
    ID["EPSG",22291]]

Definition: ESRI Well Known Text

PROJCS["Cape_Lo31",
    GEOGCS["GCS_Cape",
        DATUM["D_Cape",
            SPHEROID["Clarke_1880_Arc",6378249.145,293.4663077]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator_South_Orientated"],
    PARAMETER["latitude_of_origin",0.0],
    PARAMETER["central_meridian",31.0],
    PARAMETER["scale_factor",1.0],
    PARAMETER["false_easting",0.0],
    PARAMETER["false_northing",0.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=tmerc +axis=wsu +lat_0=0 +lon_0=31 +k=1 +x_0=0 +y_0=0 +a=6378249.145 +rf=293.4663077 +towgs84=-136,-108,-292,0,0,0,0 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:22291","+proj=tmerc +axis=wsu +lat_0=0 +lon_0=31 +k=1 +x_0=0 +y_0=0 +a=6378249.145 +rf=293.4663077 +towgs84=-136,-108,-292,0,0,0,0 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Cape / Lo31",
    "base_crs": {
        "name": "Cape",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Cape",
            "ellipsoid": {
                "name": "Clarke 1880 (Arc)",
                "semi_major_axis": 6378249.145,
                "inverse_flattening": 293.4663077
            }
        },
        "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": 4222
        }
    },
    "conversion": {
        "name": "South African Survey Grid zone 31",
        "method": {
            "name": "Transverse Mercator (South Orientated)",
            "id": {
                "authority": "EPSG",
                "code": 9808
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 0,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": 31,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "Scale factor at natural origin",
                "value": 1,
                "unit": "unity",
                "id": {
                    "authority": "EPSG",
                    "code": 8805
                }
            },
            {
                "name": "False easting",
                "value": 0,
                "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": "Westing",
                "abbreviation": "Y",
                "direction": "west",
                "unit": "metre"
            },
            {
                "name": "Southing",
                "abbreviation": "X",
                "direction": "south",
                "unit": "metre"
            }
        ]
    },
    "scope": "Cadastre, engineering survey, topographic mapping (large and medium scale).",
    "area": "South Africa - onshore between 30°E and 32°E. Eswatini (Swaziland).",
    "bbox": {
        "south_latitude": -31.38,
        "west_longitude": 29.99,
        "north_latitude": -22.22,
        "east_longitude": 32.02
    },
    "id": {
        "authority": "EPSG",
        "code": 22291
    }
}

Definition: GeoServer

22291=PROJCS["Cape / Lo31",GEOGCS["Cape",DATUM["Cape",SPHEROID["Clarke 1880 (Arc)",6378249.145,293.4663077],TOWGS84[-136,-108,-292,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4222"]],PROJECTION["Transverse_Mercator_South_Orientated"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",31],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","22291"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"axis=wsu"
	"lat_0=0"
	"lon_0=31"
	"k=1"
	"x_0=0"
	"y_0=0"
	"a=6378249.145"
	"rf=293.4663077"
	"towgs84=-136,-108,-292,0,0,0,0"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +axis=wsu +lat_0=0 +lon_0=31 +k=1 +x_0=0 +y_0=0 +a=6378249.145 +rf=293.4663077 +towgs84=-136,-108,-292,0,0,0,0 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +axis=wsu +lat_0=0 +lon_0=31 +k=1 +x_0=0 +y_0=0 +a=6378249.145 +rf=293.4663077 +towgs84=-136,-108,-292,0,0,0,0 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 22291, 'EPSG', 22291, '+proj=tmerc +axis=wsu +lat_0=0 +lon_0=31 +k=1 +x_0=0 +y_0=0 +a=6378249.145 +rf=293.4663077 +towgs84=-136,-108,-292,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["Cape / Lo31",GEOGCS["Cape",DATUM["Cape",SPHEROID["Clarke 1880 (Arc)",6378249.145,293.4663077],TOWGS84[-136,-108,-292,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4222"]],PROJECTION["Transverse_Mercator_South_Orientated"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",31],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","22291"]]');