EPSG:29381

Schwarzeck / Lo22/21

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

Selected transformation

Method: Geocentric translations (geog2D domain)

Remarks: Derived at 3 stations. Accuracy 20m in each axis. Beware! Source CRS uses German legal metres, transformation parameter values are in (International) metres. See tfm code 1271 for example.

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

Revision date: 2023-11-19

Attributes

Unit: German legal metre

Geodetic CRS: Schwarzeck

Datum: Schwarzeck

Ellipsoid: Bessel Namibia (GLM)

Prime meridian: Greenwich

Data source: EPSG

Revision date: 2007-02-12

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

Area of use: Namibia - between 20°E and 22°E.

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

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Center coordinates
432751.76 205208.6

Projected bounds:
-455291.74 -559032.42
1368441.04 1027624.77

WGS84 bounds:
8.24 -30.64
25.27 -16.95

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

PROJCS["Schwarzeck / Lo22/21",
    GEOGCS["Schwarzeck",
        DATUM["Schwarzeck",
            SPHEROID["Bessel Namibia (GLM)",6377483.86528042,299.1528128],
            TOWGS84[616,97,-251,0,0,0,0]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4293"]],
    PROJECTION["Transverse_Mercator_South_Orientated"],
    PARAMETER["latitude_of_origin",-22],
    PARAMETER["central_meridian",21],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["German legal metre",1.0000135965],
    AUTHORITY["EPSG","29381"]]

Definition: OGC Well Known Text 2 (2019)

PROJCRS["Schwarzeck / Lo22/21",
    BASEGEOGCRS["Schwarzeck",
        DATUM["Schwarzeck",
            ELLIPSOID["Bessel Namibia (GLM)",6377397.155,299.1528128,
                LENGTHUNIT["German legal metre",1.0000135965]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4293]],
    CONVERSION["South West African Survey Grid zone 21",
        METHOD["Transverse Mercator (South Orientated)",
            ID["EPSG",9808]],
        PARAMETER["Latitude of natural origin",-22,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",21,
            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["German legal metre",1.0000135965],
            ID["EPSG",8806]],
        PARAMETER["False northing",0,
            LENGTHUNIT["German legal metre",1.0000135965],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["westing (Y)",west,
            ORDER[1],
            LENGTHUNIT["German legal metre",1.0000135965]],
        AXIS["southing (X)",south,
            ORDER[2],
            LENGTHUNIT["German legal metre",1.0000135965]],
    USAGE[
        SCOPE["Cadastre, engineering survey, topographic mapping (large and medium scale)."],
        AREA["Namibia - between 20°E and 22°E."],
        BBOX[-22.01,19.99,-17.85,22]],
    ID["EPSG",29381]]

Definition: ESRI Well Known Text

PROJCS["Schwarzeck_Lo22_21",
    GEOGCS["GCS_Schwarzeck",
        DATUM["D_Schwarzeck",
            SPHEROID["Bessel_Namibia_GLM",6377483.86528042,299.1528128]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator_South_Orientated"],
    PARAMETER["latitude_of_origin",-22.0],
    PARAMETER["central_meridian",21.0],
    PARAMETER["scale_factor",1.0],
    PARAMETER["false_easting",0.0],
    PARAMETER["false_northing",0.0],
    UNIT["German legal metre",1.0000135965]]

Definition: PROJ.4

+proj=tmerc +axis=wsu +lat_0=-22 +lon_0=21 +k=1 +x_0=0 +y_0=0 +ellps=bess_nam +towgs84=616,97,-251,0,0,0,0 +to_meter=1.0000135965 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:29381","+proj=tmerc +axis=wsu +lat_0=-22 +lon_0=21 +k=1 +x_0=0 +y_0=0 +ellps=bess_nam +towgs84=616,97,-251,0,0,0,0 +to_meter=1.0000135965 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Schwarzeck / Lo22/21",
    "base_crs": {
        "name": "Schwarzeck",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Schwarzeck",
            "ellipsoid": {
                "name": "Bessel Namibia (GLM)",
                "semi_major_axis": {
                    "value": 6377397.155,
                    "unit": {
                        "type": "LinearUnit",
                        "name": "German legal metre",
                        "conversion_factor": 1.0000135965
                    }
                },
                "inverse_flattening": 299.1528128
            }
        },
        "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": 4293
        }
    },
    "conversion": {
        "name": "South West African Survey Grid zone 21",
        "method": {
            "name": "Transverse Mercator (South Orientated)",
            "id": {
                "authority": "EPSG",
                "code": 9808
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": -22,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": 21,
                "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": {
                    "type": "LinearUnit",
                    "name": "German legal metre",
                    "conversion_factor": 1.0000135965
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 0,
                "unit": {
                    "type": "LinearUnit",
                    "name": "German legal metre",
                    "conversion_factor": 1.0000135965
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8807
                }
            }
        ]
    },
    "coordinate_system": {
        "subtype": "Cartesian",
        "axis": [
            {
                "name": "Westing",
                "abbreviation": "Y",
                "direction": "west",
                "unit": {
                    "type": "LinearUnit",
                    "name": "German legal metre",
                    "conversion_factor": 1.0000135965
                }
            },
            {
                "name": "Southing",
                "abbreviation": "X",
                "direction": "south",
                "unit": {
                    "type": "LinearUnit",
                    "name": "German legal metre",
                    "conversion_factor": 1.0000135965
                }
            }
        ]
    },
    "scope": "Cadastre, engineering survey, topographic mapping (large and medium scale).",
    "area": "Namibia - between 20°E and 22°E.",
    "bbox": {
        "south_latitude": -22.01,
        "west_longitude": 19.99,
        "north_latitude": -17.85,
        "east_longitude": 22
    },
    "id": {
        "authority": "EPSG",
        "code": 29381
    }
}

Definition: GeoServer

29381=PROJCS["Schwarzeck / Lo22/21",GEOGCS["Schwarzeck",DATUM["Schwarzeck",SPHEROID["Bessel Namibia (GLM)",6377483.86528042,299.1528128],TOWGS84[616,97,-251,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4293"]],PROJECTION["Transverse_Mercator_South_Orientated"],PARAMETER["latitude_of_origin",-22],PARAMETER["central_meridian",21],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["German legal metre",1.0000135965],AUTHORITY["EPSG","29381"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"axis=wsu"
	"lat_0=-22"
	"lon_0=21"
	"k=1"
	"x_0=0"
	"y_0=0"
	"ellps=bess_nam"
	"towgs84=616,97,-251,0,0,0,0"
	"to_meter=1.0000135965"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +axis=wsu +lat_0=-22 +lon_0=21 +k=1 +x_0=0 +y_0=0 +ellps=bess_nam +towgs84=616,97,-251,0,0,0,0 +to_meter=1.0000135965 +no_defs +type=crs">
	<Layer srs="+proj=tmerc +axis=wsu +lat_0=-22 +lon_0=21 +k=1 +x_0=0 +y_0=0 +ellps=bess_nam +towgs84=616,97,-251,0,0,0,0 +to_meter=1.0000135965 +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 29381, 'EPSG', 29381, '+proj=tmerc +axis=wsu +lat_0=-22 +lon_0=21 +k=1 +x_0=0 +y_0=0 +ellps=bess_nam +towgs84=616,97,-251,0,0,0,0 +to_meter=1.0000135965 +no_defs +type=crs', 'PROJCS["Schwarzeck / Lo22/21",GEOGCS["Schwarzeck",DATUM["Schwarzeck",SPHEROID["Bessel Namibia (GLM)",6377483.86528042,299.1528128],TOWGS84[616,97,-251,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4293"]],PROJECTION["Transverse_Mercator_South_Orientated"],PARAMETER["latitude_of_origin",-22],PARAMETER["central_meridian",21],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["German legal metre",1.0000135965],AUTHORITY["EPSG","29381"]]');