EPSG:4124

RT90

Transform Get position on a map

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

Selected transformation

Method: Coordinate Frame rotation (geog2D domain)

Remarks: Parameter values from RT90 to SWEREF99 (1) (code 1895) assuming that SWEREF99 is equivalent to WGS 84 within the accuracy of the transformation. Replaces RT90 to WGS 84 (1) (code 1680).

Information source: OGP

Revision date: 2020-03-14

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: RT90

Datum: Rikets koordinatsystem 1990

Ellipsoid: Bessel 1841

Prime meridian: Greenwich

Data source: EPSG

Information source: Lantmateriverket (National Land Survey of Sweden). http://www.lantmateriet.se

Revision date: 2004-01-06

Scope: Geodesy.

Area of use: Sweden - onshore and offshore.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

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Center coordinates
17.1 62.02

WGS84 bounds:
10.03 54.96
24.17 69.07

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

GEOGCS["RT90",
    DATUM["Rikets_koordinatsystem_1990",
        SPHEROID["Bessel 1841",6377397.155,299.1528128],
        TOWGS84[414.1,41.3,603.1,-0.855,2.141,-7.023,0]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4124"]]

Definition: OGC Well Known Text 2 (2019)

GEOGCRS["RT90",
    DATUM["Rikets koordinatsystem 1990",
        ELLIPSOID["Bessel 1841",6377397.155,299.1528128,
            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["Geodesy."],
        AREA["Sweden - onshore and offshore."],
        BBOX[54.96,10.03,69.07,24.17]],
    ID["EPSG",4124]]

Definition: ESRI Well Known Text

GEOGCS["GCS_RT_1990",
    DATUM["D_RT_1990",
        SPHEROID["Bessel_1841",6377397.155,299.1528128]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

+proj=longlat +ellps=bessel +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4124","+proj=longlat +ellps=bessel +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "GeographicCRS",
    "name": "RT90",
    "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "Rikets koordinatsystem 1990",
        "ellipsoid": {
            "name": "Bessel 1841",
            "semi_major_axis": 6377397.155,
            "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"
            }
        ]
    },
    "scope": "Geodesy.",
    "area": "Sweden - onshore and offshore.",
    "bbox": {
        "south_latitude": 54.96,
        "west_longitude": 10.03,
        "north_latitude": 69.07,
        "east_longitude": 24.17
    },
    "id": {
        "authority": "EPSG",
        "code": 4124
    }
}

Definition: GeoServer

4124=GEOGCS["RT90",DATUM["Rikets_koordinatsystem_1990",SPHEROID["Bessel 1841",6377397.155,299.1528128],TOWGS84[414.1,41.3,603.1,-0.855,2.141,-7.023,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4124"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=bessel"
	"towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=bessel +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=bessel +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4124, 'EPSG', 4124, '+proj=longlat +ellps=bessel +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs +type=crs', 'GEOGCS["RT90",DATUM["Rikets_koordinatsystem_1990",SPHEROID["Bessel 1841",6377397.155,299.1528128],TOWGS84[414.1,41.3,603.1,-0.855,2.141,-7.023,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4124"]]');