EPSG:3873 — ETRS89-FIN [EUREF-FIN] / GK19FIN

Projected · Finland - west of 19.5°E onshore nominal

Export Formats

OGC WKT

PROJCS[
    "ETRS89 / GK19FIN",
    GEOGCS[
        "ETRS89",
        DATUM[
            "European_Terrestrial_Reference_System_1989",
            SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],
            TOWGS84[0,0,0,0,0,0,0],
            AUTHORITY["EPSG","6258"]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4258"]
    ],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",19],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",19500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","3873"]
]

WKT2

PROJCRS[
    "ETRS89-FIN [EUREF-FIN] / GK19FIN",
    BASEGEOGCRS[
        "ETRS89-FIN [EUREF-FIN]",
        DATUM[
            "EUREF-FIN",
            ELLIPSOID[
                "GRS 1980",
                6378137,
                298.257222101,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7019]
            ],
            ANCHOREPOCH[1997],
            ID["EPSG",1391]
        ],
        ID["EPSG",10690]
    ],
    CONVERSION[
        "Finland Gauss-Kruger zone 19",
        METHOD["Transverse Mercator",ID["EPSG",9807]],
        PARAMETER[
            "Latitude of natural origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            19,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "Scale factor at natural origin",
            1,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8805]
        ],
        PARAMETER[
            "False easting",
            19500000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",3860]
    ],
    CS[Cartesian,2,ID["EPSG",4500]],
    AXIS["Northing (N)",north],
    AXIS["Easting (E)",east],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",3873]
]

PROJ.4

+proj=tmerc +lat_0=0 +lon_0=19 +k=1 +x_0=19500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:3873", "+proj=tmerc +lat_0=0 +lon_0=19 +k=1 +x_0=19500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 3873,
  "name": "ETRS89-FIN [EUREF-FIN] / GK19FIN",
  "kind": "projected",
  "area": "Finland - west of 19.5°E onshore nominal",
  "unit": "metre",
  "bbox": [
    60.08,
    19.24,
    60.34,
    19.5
  ],
  "proj4": "+proj=tmerc +lat_0=0 +lon_0=19 +k=1 +x_0=19500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs"
}

PostGIS

How to add a projection to PostGIS? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3873, 'EPSG', 3873, '+proj=tmerc +lat_0=0 +lon_0=19 +k=1 +x_0=19500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["ETRS89 / GK19FIN",GEOGCS["ETRS89",DATUM["European_Terrestrial_Reference_System_1989",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6258"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4258"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",19],PARAMETER["scale_factor",1],PARAMETER["false_easting",19500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","3873"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=tmerc"
  "+lat_0=0"
  "+lon_0=19"
  "+k=1"
  "+x_0=19500000"
  "+y_0=0"
  "+ellps=GRS80"
  "+towgs84=0,0,0,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

3873=PROJCS["ETRS89 / GK19FIN",GEOGCS["ETRS89",DATUM["European_Terrestrial_Reference_System_1989",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6258"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4258"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",19],PARAMETER["scale_factor",1],PARAMETER["false_easting",19500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","3873"]]

Related Coordinate Systems

Available Transformations (4)

Transformations inherited from base CRS: EPSG:10690 (ETRS89-FIN [EUREF-FIN])

Transformation	Source → Target	Accuracy (m)
KKJ to ETRS89-FIN [EUREF-FIN] (3)	4123 → 10690	0.03
KKJ to ETRS89-FIN [EUREF-FIN] (2)	4123 → 10690	0.5
ETRS89-FIN [EUREF-FIN] to WGS 84 (1)	10690 → 4326	1
EUREF-FIN to ETRS89 (1) Deprecated	10690 → 4258	0.1

Other CRS using EUREF-FIN (32)

Frequently Asked Questions

How do I add EPSG:3873 to GeoServer?

Add the following definition to your GeoServer configuration:

3873=PROJCS["ETRS89 / GK19FIN",GEOGCS["ETRS89",DATUM["European_Terrestrial_Reference_System_1989",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6258"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4258"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",19],PARAMETER["scale_factor",1],PARAMETER["false_easting",19500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","3873"]]

Read the full GeoServer guide →

How do I add EPSG:3873 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3873, 'EPSG', 3873, '+proj=tmerc +lat_0=0 +lon_0=19 +k=1 +x_0=19500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["ETRS89 / GK19FIN",GEOGCS["ETRS89",DATUM["European_Terrestrial_Reference_System_1989",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6258"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4258"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",19],PARAMETER["scale_factor",1],PARAMETER["false_easting",19500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","3873"]]');

Read the full PostGIS guide →

How do I add EPSG:3873 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=tmerc"
  "+lat_0=0"
  "+lon_0=19"
  "+k=1"
  "+x_0=19500000"
  "+y_0=0"
  "+ellps=GRS80"
  "+towgs84=0,0,0,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:3873 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:3873", "+proj=tmerc +lat_0=0 +lon_0=19 +k=1 +x_0=19500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs");

Read the full Proj4js guide →

Type

Projected

Unit

metre

Geodetic CRS

ETRS89-FIN [EUREF-FIN]

Datum

EUREF-FIN

Ellipsoid

GRS 1980

Prime Meridian

Greenwich

Area of Use

Finland - west of 19.5°E onshore nominal

Finland - nominally onshore west of 19°30'E but may be used in adjacent areas to east if a municipal…

Coordinate System

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

Center Coordinates

19520514.94 6677527.26

Projected Bounds

6692058.68 19513359.6319527613.05 6663010.11

WGS84 Bounds

60.34 19.2419.50 60.08

Data Source

EPSG

Information Source

National Land Survey of Finland; http://www.maanmittauslaitos.fi

Revision Date

2025-10-28

Scope

Cadastre, engineering survey, topographic mapping (large scale).

Remarks

Replaces ETRS89-FIN [EUREF-FIN] / ETRS-GK19FIN (CRS code 3126). (For medium scale mapping and country-wide work use either ETRS89-FIN [EUREF-FIN] / TM35FIN(N,E), code 5048, or its more generally used replacement with axes reversed ETRS89-FIN [EUREF-FIN] / TM35FIN(E,N), code 3067).

EPSG

3873