EPSG:4124 — RT90

Geographic 2D · Sweden

Export Formats

OGC WKT

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"]
]

WKT2

GEOGCRS[
    "RT90",
    DATUM[
        "Rikets koordinatsystem 1990",
        ELLIPSOID[
            "Bessel 1841",
            6377397.155,
            299.1528128,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7004]
        ],
        ID["EPSG",6124]
    ],
    CS[ellipsoidal,2,ID["EPSG",6422]],
    AXIS["Geodetic latitude (Lat)",north],
    AXIS["Geodetic longitude (Lon)",east],
    ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
    ID["EPSG",4124]
]

PROJ.4

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

Proj4js

How to add a projection to 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");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 4124,
  "name": "RT90",
  "kind": "geographic 2D",
  "area": "Sweden",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    54.96,
    10.03,
    69.07,
    24.17
  ],
  "proj4": "+proj=longlat +ellps=bessel +towgs84=414.1,41.3,603.1,0.855,-2.141,7.023,0 +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 (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"]]');

MapServer

How to add a projection to MapServer? →

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

GeoServer

How to add a projection to 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"]]

Related Coordinate Systems

Available Transformations (7)

Transformation	Source → Target	Accuracy (m)
RT90 to ETRS89-SWE [SWEREF 99] (1)	4124 → 4619	0.1
RT90 to ETRS89 (1)	4124 → 4258	0.5
RT90 to WGS 84 (1)	4124 → 4326	1
RT90 to WGS 84 (2)	4124 → 4326	1
RT90 to ETRS89 (2) Deprecated	4124 → 4258	—
RT90 to WGS 84 (2) Deprecated	4124 → 4326	—
RT90 to WGS 84 (1) Deprecated	4124 → 4326	—

Other CRS for SE

Other CRS using Rikets koordinatsystem 1990

Frequently Asked Questions

How do I add EPSG:4124 to GeoServer?

Add the following definition to your GeoServer configuration:

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"]]

Read the full GeoServer guide →

How do I add EPSG:4124 to PostGIS?

Add the following definition to your PostGIS configuration:

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"]]');

Read the full PostGIS guide →

How do I add EPSG:4124 to MapServer?

Add the following definition to your MapServer configuration:

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

Read the full MapServer guide →

How do I use EPSG:4124 with Proj4js?

Add the following definition to your Proj4js configuration:

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");

Read the full Proj4js guide →