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EPSG Library · Saudi Arabia

EPSG:20440 — Ain el Abd / UTM zone 40N

Source: EPSG Dataset via PROJ 9.5.1 · Updated

Summary

EPSG:20440 (Ain el Abd / UTM zone 40N) is a projected coordinate reference system on the Ain el Abd 1970 datum using the Transverse Mercator method, with coordinates in metres. Area of use: Saudi Arabia - east of 54°E.

  • Type: projected
  • Datum: Ain el Abd 1970
  • Units: metre
  • Axes: E, N
  • Central meridian: 57°

Definition

EPSG:20440 as published in the EPSG Dataset (PROJ 9.5.1).
PropertyValue
EPSG codeEPSG:20440
NameAin el Abd / UTM zone 40N
TypeProjected CRS
DatumAin el Abd 1970
EllipsoidInternational 1924 (a = 6,378,388.000 m, 1/f = 297)
Prime meridianGreenwich
Projection methodTransverse Mercator
AxesEasting (E, east, metre); Northing (N, north, metre)
ScopeEngineering survey, topographic mapping.
Bounding box54° to 55.67° longitude, 19.66° to 22.77° latitude

Area of use

Saudi Arabia - east of 54°E.

Projection parameters

Transverse Mercator parameters.
ParameterValueUnit
Latitude of natural origin0degree
Longitude of natural origin57degree
Scale factor at natural origin0.9996unity
False easting500,000metre
False northing0metre

Example coordinates

A WGS 84 point at longitude 55.42°, latitude 22.27° (inside the area of use) has these coordinates in EPSG:20440:

Computed with PROJ using the EPSG default operation: axis order change (2D) + Inverse of Ain el Abd to WGS 84 (2) + UTM zone 40N.
AxisValueUnit
E337,215.759m
N2,463,548.274m

At this point the projection scale factor is 0.99992745 and the grid convergence is -0.598908°.

Open this conversion in the coordinate converter

Transformations to WGS 84

Candidate operations from the EPSG Dataset, best first as ranked by PROJ.
OperationAccuracyArea of use
axis order change (2D) + Ain el Abd to WGS 84 (2) + axis order change (2D)18 mSaudi Arabia - onshore.
axis order change (2D) + Ain el Abd to WGS 84 (4) + axis order change (2D)1 mKuwait - onshore.
axis order change (2D) + Ain el Abd to WGS 84 (3) + axis order change (2D)1 mKuwait - onshore.
axis order change (2D) + Ain el Abd to WGS 84 (5) + axis order change (2D)1 mKuwait - 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 mKuwait - 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 mBahrain - 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=utm +zone=40 +ellps=intl +units=m +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=utm +zone=40 +ellps=intl +units=m +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
PROJCRS["Ain el Abd / UTM zone 40N", BASEGEOGCRS["Ain el Abd", DATUM["Ain el Abd 1970", ELLIPSOID["International 1924",6378388,297, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4204]], CONVERSION["UTM zone 40N", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",57, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.9996, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",500000, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",0, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["(E)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["(N)",north, ORDER[2], LENGTHUNIT["metre",1]], USAGE[ SCOPE["Engineering survey, topographic mapping."], AREA["Saudi Arabia - east of 54°E."], BBOX[19.66,54,22.77,55.67]], ID["EPSG",20440]]

Downloads

FAQ

What is EPSG:20440?

EPSG:20440 (Ain el Abd / UTM zone 40N) is a projected coordinate reference system on the Ain el Abd 1970 datum using the Transverse Mercator method, with coordinates in metres. Area of use: Saudi Arabia - east of 54°E.

Where can EPSG:20440 be used?

Its area of use is: Saudi Arabia - east of 54°E.

Is EPSG:20440 in metres or degrees?

EPSG:20440 is projected, so coordinates are easting and northing in metres, not degrees.

How do I convert EPSG:20440 to latitude and longitude?

Transform from EPSG:20440 to EPSG:4326 (WGS 84). In GeoCAD Bridge open the coordinate converter with EPSG:20440 preselected, enter easting and northing, and choose WGS 84 as the target.

What is the central meridian of EPSG:20440?

57° (UTM zone 40), with a scale factor of 0.9996, false easting 500 000 m and false northing 0 m.

How accurate is the transformation from EPSG:20440 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

  1. IOGP. EPSG Geodetic Parameter Dataset, epsg.org/crs_20440.
  2. PROJ 9.5.1 / pyproj 3.7.2, used to compute every value on this page.

Cite this page

GeoCAD Bridge. “EPSG:20440 — Ain el Abd / UTM zone 40N.” GeoCAD Bridge EPSG Library, updated 2026-10-05. https://www.geocadbridge.com/epsg/20440/