EPSG:25884

ETRS89 / TM Baltic93

Selected transformation

Name: ETRS89 to GSB-IRF (1)

Method: NTv2

Grid Files: gsb_2022.gsb

Remarks: In conjunction with the GSB-reconstruction projection (code 10261) applied to GSB-IRF (code 10260), enables transformation of coordinates between the historic Generalstaben in Bornholm and ETRS89. File is also available in GeoTIFF format (gsb_2022.tif).

Information source: The Danish Agency for Data Supply and Infrastructure, https://sdfi.dk

Revision date: 2023-05-10

Attributes

Unit: metre

Geodetic CRS: ETRS89

Datum: European Terrestrial Reference System 1989 ensemble

Data source: EPSG

Information source: http://www.geo.ut.ee/

Revision date: 2025-04-10

Scope: Topographic mapping (medium and small scale).

Remarks: Used as a common CRS for the Baltic states and for medium and small scale mapping since 1993. For large scale applications see CRS codes 3300 and 3301 (Estonia), 3059 and 10306 (Latvia), and 2600 (Lituania).

Area of use: Estonia, Latvia and Lithuania - onshore and offshore.

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

Center coordinates
-77672.36 6150295.72

Projected bounds:
-101911.19 6123218.25
-53652.5 6177456.39

WGS84 bounds:
14.59 54.94
15.25 55.38

Denmark - Bornholm onshore.
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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        PROJCRS["ETRS89 / TM Baltic93",
            BASEGEOGCRS["ETRS89",
                ENSEMBLE["European Terrestrial Reference System 1989 ensemble",
                    MEMBER["European Terrestrial Reference Frame 1989"],
                    MEMBER["European Terrestrial Reference Frame 1990"],
                    MEMBER["European Terrestrial Reference Frame 1991"],
                    MEMBER["European Terrestrial Reference Frame 1992"],
                    MEMBER["European Terrestrial Reference Frame 1993"],
                    MEMBER["European Terrestrial Reference Frame 1994"],
                    MEMBER["European Terrestrial Reference Frame 1996"],
                    MEMBER["European Terrestrial Reference Frame 1997"],
                    MEMBER["European Terrestrial Reference Frame 2000"],
                    MEMBER["European Terrestrial Reference Frame 2005"],
                    MEMBER["European Terrestrial Reference Frame 2014"],
                    MEMBER["European Terrestrial Reference Frame 2020"],
                    ELLIPSOID["GRS 1980",6378137,298.257222101,
                        LENGTHUNIT["metre",1]],
                    ENSEMBLEACCURACY[0.1]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",4258]],
            CONVERSION["TM Baltic 93",
                METHOD["Transverse Mercator",
                    ID["EPSG",9807]],
                PARAMETER["Latitude of natural origin",0,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",24,
                    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["northing (X)",north,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["easting (Y)",east,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
            USAGE[
                SCOPE["Topographic mapping (medium and small scale)."],
                AREA["Estonia, Latvia and Lithuania - onshore and offshore."],
                BBOX[53.89,19.02,60,28.24]],
            ID["EPSG",25884]]],
    TARGETCRS[
        GEOGCRS["GSB-IRF",
            DATUM["Generalstabens System Bornholm Intermediate Datum",
                ELLIPSOID["Danish 1876",6377019.27,300,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Intermediate stage in transformations - not used otherwise."],
                AREA["Denmark - Bornholm onshore."],
                BBOX[54.94,14.59,55.38,15.25]],
            ID["EPSG",10260]]],
    ABRIDGEDTRANSFORMATION["ETRS89 to GSB-IRF (1)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","gsb_2022.gsb"],
        USAGE[
            SCOPE["Intermediate stage in transformations - not used otherwise."],
            AREA["Denmark - Bornholm onshore."],
            BBOX[54.94,14.59,55.38,15.25]],
        ID["EPSG",10263],
        REMARK["In conjunction with the GSB-reconstruction projection (code 10261) applied to GSB-IRF (code 10260), enables transformation of coordinates between the historic Generalstaben in Bornholm and ETRS89. File is also available in GeoTIFF format (gsb_2022.tif)."]]]

Definition: PROJ.4

+proj=tmerc +lat_0=0 +lon_0=24 +k=0.9996 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:25884","+proj=tmerc +lat_0=0 +lon_0=24 +k=0.9996 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "ProjectedCRS",
        "name": "ETRS89 / TM Baltic93",
        "base_crs": {
            "type": "GeographicCRS",
            "name": "ETRS89",
            "datum_ensemble": {
                "name": "European Terrestrial Reference System 1989 ensemble",
                "members": [
                    {
                        "name": "European Terrestrial Reference Frame 1989",
                        "id": {
                            "authority": "EPSG",
                            "code": 1178
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 1990",
                        "id": {
                            "authority": "EPSG",
                            "code": 1179
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 1991",
                        "id": {
                            "authority": "EPSG",
                            "code": 1180
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 1992",
                        "id": {
                            "authority": "EPSG",
                            "code": 1181
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 1993",
                        "id": {
                            "authority": "EPSG",
                            "code": 1182
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 1994",
                        "id": {
                            "authority": "EPSG",
                            "code": 1183
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 1996",
                        "id": {
                            "authority": "EPSG",
                            "code": 1184
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 1997",
                        "id": {
                            "authority": "EPSG",
                            "code": 1185
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 2000",
                        "id": {
                            "authority": "EPSG",
                            "code": 1186
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 2005",
                        "id": {
                            "authority": "EPSG",
                            "code": 1204
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 2014",
                        "id": {
                            "authority": "EPSG",
                            "code": 1206
                        }
                    },
                    {
                        "name": "European Terrestrial Reference Frame 2020",
                        "id": {
                            "authority": "EPSG",
                            "code": 1382
                        }
                    }
                ],
                "ellipsoid": {
                    "name": "GRS 1980",
                    "semi_major_axis": 6378137,
                    "inverse_flattening": 298.257222101
                },
                "accuracy": "0.1",
                "id": {
                    "authority": "EPSG",
                    "code": 6258
                }
            },
            "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": 4258
            }
        },
        "conversion": {
            "name": "TM Baltic 93",
            "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": 24,
                    "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": "Northing",
                    "abbreviation": "X",
                    "direction": "north",
                    "unit": "metre"
                },
                {
                    "name": "Easting",
                    "abbreviation": "Y",
                    "direction": "east",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 25884
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "GSB-IRF",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Generalstabens System Bornholm Intermediate Datum",
            "ellipsoid": {
                "name": "Danish 1876",
                "semi_major_axis": 6377019.27,
                "inverse_flattening": 300
            }
        },
        "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": 10260
        }
    },
    "transformation": {
        "name": "ETRS89 to GSB-IRF (1)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "gsb_2022.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 10263
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=0"
	"lon_0=24"
	"k=0.9996"
	"x_0=500000"
	"y_0=0"
	"ellps=GRS80"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=0 +lon_0=24 +k=0.9996 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=0 +lon_0=24 +k=0.9996 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs">
	</Layer>
</Map>