EPSG:4124

RT90

Transform Get position on a map

Available transformations
to EPSG:4258
EPSG:4258 - ETRS89

Selected transformation

Method: Coordinate Frame rotation (geog2D domain)

Remarks: Derived at 22 points in 1993. Replaced by RT90 to SWEREF99 (1) (code 1895) from 2001. This transformation is actually between ETRS89 and RR92. RR92 is a geographic 3D CRS where the horizontal component is RT90.

Information source: National Land Survey of Sweden.

Revision date: 2023-11-19

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[419.3836,99.3335,591.3451,-0.850389,-1.817277,7.862238,-0.99496]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4124"]]

Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        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]]],
    TARGETCRS[
        GEOGCRS["WGS 84",
            ENSEMBLE["World Geodetic System 1984 ensemble",
                MEMBER["World Geodetic System 1984 (Transit)"],
                MEMBER["World Geodetic System 1984 (G730)"],
                MEMBER["World Geodetic System 1984 (G873)"],
                MEMBER["World Geodetic System 1984 (G1150)"],
                MEMBER["World Geodetic System 1984 (G1674)"],
                MEMBER["World Geodetic System 1984 (G1762)"],
                MEMBER["World Geodetic System 1984 (G2139)"],
                ELLIPSOID["WGS 84",6378137,298.257223563,
                    LENGTHUNIT["metre",1]],
                ENSEMBLEACCURACY[2.0]],
            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["Horizontal component of 3D system."],
                AREA["World."],
                BBOX[-90,-180,90,180]],
            ID["EPSG",4326]]],
    ABRIDGEDTRANSFORMATION["Transformation from unknown to WGS84",
        METHOD["Position Vector transformation (geog2D domain)",
            ID["EPSG",9606]],
        PARAMETER["X-axis translation",419.3836,
            ID["EPSG",8605]],
        PARAMETER["Y-axis translation",99.3335,
            ID["EPSG",8606]],
        PARAMETER["Z-axis translation",591.3451,
            ID["EPSG",8607]],
        PARAMETER["X-axis rotation",-0.850389,
            ID["EPSG",8608]],
        PARAMETER["Y-axis rotation",-1.817277,
            ID["EPSG",8609]],
        PARAMETER["Z-axis rotation",7.862238,
            ID["EPSG",8610]],
        PARAMETER["Scale difference",0.99999900504,
            ID["EPSG",8611]]]]

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=419.3836,99.3335,591.3451,-0.850389,-1.817277,7.862238,-0.99496 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4124","+proj=longlat +ellps=bessel +towgs84=419.3836,99.3335,591.3451,-0.850389,-1.817277,7.862238,-0.99496 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "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"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4124
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "WGS 84",
        "datum_ensemble": {
            "name": "World Geodetic System 1984 ensemble",
            "members": [
                {
                    "name": "World Geodetic System 1984 (Transit)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1166
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G730)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1152
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G873)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1153
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1150)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1154
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1674)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1155
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1762)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1156
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G2139)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1309
                    }
                }
            ],
            "ellipsoid": {
                "name": "WGS 84",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257223563
            },
            "accuracy": "2.0",
            "id": {
                "authority": "EPSG",
                "code": 6326
            }
        },
        "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": 4326
        }
    },
    "transformation": {
        "name": "Transformation from unknown to WGS84",
        "method": {
            "name": "Position Vector transformation (geog2D domain)",
            "id": {
                "authority": "EPSG",
                "code": 9606
            }
        },
        "parameters": [
            {
                "name": "X-axis translation",
                "value": 419.3836,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8605
                }
            },
            {
                "name": "Y-axis translation",
                "value": 99.3335,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8606
                }
            },
            {
                "name": "Z-axis translation",
                "value": 591.3451,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8607
                }
            },
            {
                "name": "X-axis rotation",
                "value": -0.850389,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8608
                }
            },
            {
                "name": "Y-axis rotation",
                "value": -1.817277,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8609
                }
            },
            {
                "name": "Z-axis rotation",
                "value": 7.862238,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8610
                }
            },
            {
                "name": "Scale difference",
                "value": -0.99496,
                "unit": {
                    "type": "ScaleUnit",
                    "name": "parts per million",
                    "conversion_factor": 1e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8611
                }
            }
        ]
    }
}

Definition: GeoServer

4124=GEOGCS["RT90",DATUM["Rikets_koordinatsystem_1990",SPHEROID["Bessel 1841",6377397.155,299.1528128],TOWGS84[419.3836,99.3335,591.3451,-0.850389,-1.817277,7.862238,-0.99496]],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=419.3836,99.3335,591.3451,-0.850389,-1.817277,7.862238,-0.99496"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=bessel +towgs84=419.3836,99.3335,591.3451,-0.850389,-1.817277,7.862238,-0.99496 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=bessel +towgs84=419.3836,99.3335,591.3451,-0.850389,-1.817277,7.862238,-0.99496 +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=419.3836,99.3335,591.3451,-0.850389,-1.817277,7.862238,-0.99496 +no_defs +type=crs', 'GEOGCS["RT90",DATUM["Rikets_koordinatsystem_1990",SPHEROID["Bessel 1841",6377397.155,299.1528128],TOWGS84[419.3836,99.3335,591.3451,-0.850389,-1.817277,7.862238,-0.99496]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4124"]]');