EPSG Library · Saudi Arabia

EPSG:4204 — Ain el Abd

Source: EPSG Dataset via PROJ 9.5.1 · Updated 2026-10-05

Summary

EPSG:4204 (Ain el Abd) is a geographic 2D coordinate reference system on the Ain el Abd 1970 datum with coordinates in degrees. Area of use: Bahrain, Kuwait and Saudi Arabia - onshore.

Type: geographic 2D
Datum: Ain el Abd 1970
Units: degree
Axes: Lat, Lon

Definition

EPSG:4204 as published in the EPSG Dataset (PROJ 9.5.1).
Property	Value
EPSG code	EPSG:4204
Name	Ain el Abd
Type	Geographic 2d CRS
Datum	Ain el Abd 1970
Ellipsoid	International 1924 (a = 6,378,388.000 m, 1/f = 297)
Prime meridian	Greenwich
Axes	Geodetic latitude (Lat, north, degree); Geodetic longitude (Lon, east, degree)
Scope	Geodesy.
Bounding box	34.51° to 55.67° longitude, 16.37° to 32.16° latitude

Area of use

Bahrain, Kuwait and Saudi Arabia - onshore.

Example coordinates

A WGS 84 point at longitude 45.09°, latitude 24.265° (inside the area of use) has these coordinates in EPSG:4204:

Computed with PROJ using the EPSG default operation: unavailable until proj_trans is called.
Axis	Value	Unit
Longitude	45.090643	°
Latitude	24.264564	°

Open this conversion in the coordinate converter

Transformations to WGS 84

Candidate operations from the EPSG Dataset, best first as ranked by PROJ.
Operation	Accuracy	Area of use
axis order change (2D) + Ain el Abd to WGS 84 (2) + axis order change (2D)	18 m	Saudi Arabia - onshore.
axis order change (2D) + Ain el Abd to WGS 84 (4) + axis order change (2D)	1 m	Kuwait - onshore.
axis order change (2D) + Ain el Abd to WGS 84 (3) + axis order change (2D)	1 m	Kuwait - onshore.
axis order change (2D) + Ain el Abd to WGS 84 (5) + axis order change (2D)	1 m	Kuwait - onshore north of a line between Al Jahra' and the Kuwait/Iraq/Saudi Arabia border tripoint.
axis order change (2D) + Ain el Abd to WGS 84 (6) + axis order change (2D)	1 m	Kuwait - onshore south of a line between Al Jahra' and the Kuwait/Iraq/Saudi Arabia border tripoint.
axis order change (2D) + Ain el Abd to WGS 84 (1) + axis order change (2D)	44 m	Bahrain - onshore.

Transformations change the datum, so each has an accuracy and an area of use. Choose the most accurate one that covers your data and record its name. See datum transformations.

Definitions and downloads

PROJ string

+proj=longlat +ellps=intl +no_defs +type=crs

A PROJ string cannot carry every EPSG detail (axis order, datum ensemble, transformations). Prefer WKT2 or the EPSG code itself.

Proj4js definition used by the converter

+proj=longlat +ellps=intl +towgs84=-143,-236,7 +no_defs

Datum shift from Ain el Abd to WGS 84 (2) (EPSG accuracy 18 m), the best single Helmert operation for this area of use. Where PROJ prefers a grid-based or multi-step operation (see the table above), results can differ by up to that operation's accuracy.

WKT2:2019

GEOGCRS["Ain el Abd", DATUM["Ain el Abd 1970", ELLIPSOID["International 1924",6378388,297, 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["Bahrain, Kuwait and Saudi Arabia - onshore."], BBOX[16.37,34.51,32.16,55.67]], ID["EPSG",4204]]

Downloads

4204.prj — ESRI WKT for shapefiles
4204.wkt — OGC WKT2:2019

FAQ

What is EPSG:4204?

EPSG:4204 (Ain el Abd) is a geographic 2D coordinate reference system on the Ain el Abd 1970 datum with coordinates in degrees. Area of use: Bahrain, Kuwait and Saudi Arabia - onshore.

Where can EPSG:4204 be used?

Its area of use is: Bahrain, Kuwait and Saudi Arabia - onshore.

What is the axis order of EPSG:4204?

By the EPSG definition: Geodetic latitude, Geodetic longitude. Many GIS formats such as GeoJSON and KML store longitude first instead.

How accurate is the transformation from EPSG:4204 to WGS 84?

The most accurate EPSG transformation listed here is “axis order change (2D) + Ain el Abd to WGS 84 (4) + axis order change (2D)”, with a stated accuracy of 1 m for Kuwait - onshore.. Always check the area of use before applying it.

Coordinate systems

Articles

Tools

References

IOGP. EPSG Geodetic Parameter Dataset, epsg.org/crs_4204.
PROJ 9.5.1 / pyproj 3.7.2, used to compute every value on this page.

Cite this page

GeoCAD Bridge. “EPSG:4204 — Ain el Abd.” GeoCAD Bridge EPSG Library, updated 2026-10-05. https://www.geocadbridge.com/epsg/4204/