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EPSG Library · United Arab Emirates

EPSG:4270 — Nahrwan 1967

Source: EPSG Dataset via PROJ 9.5.1 · Updated

Summary

EPSG:4270 (Nahrwan 1967) is a geographic 2D coordinate reference system on the Nahrwan 1967 datum with coordinates in degrees. Area of use: Arabian Gulf; Qatar - offshore; United Arab Emirates (UAE) - Abu Dhabi; Dubai; Sharjah; Ajman; Fujairah; Ras Al Kaimah; Umm Al Qaiwain - onshore and offshore.

  • Type: geographic 2D
  • Datum: Nahrwan 1967
  • Units: degree
  • Axes: Lat, Lon

Definition

EPSG:4270 as published in the EPSG Dataset (PROJ 9.5.1).
PropertyValue
EPSG codeEPSG:4270
NameNahrwan 1967
TypeGeographic 2d CRS
DatumNahrwan 1967
EllipsoidClarke 1880 (RGS) (a = 6,378,249.145 m, 1/f = 293.465)
Prime meridianGreenwich
AxesGeodetic latitude (Lat, north, degree); Geodetic longitude (Lon, east, degree)
ScopeGeodesy.
Bounding box50.55° to 57.13° longitude, 22.63° to 27.05° latitude

Area of use

Arabian Gulf; Qatar - offshore; United Arab Emirates (UAE) - Abu Dhabi; Dubai; Sharjah; Ajman; Fujairah; Ras Al Kaimah; Umm Al Qaiwain - onshore and offshore.

Example coordinates

A WGS 84 point at longitude 53.84°, latitude 24.84° (inside the area of use) has these coordinates in EPSG:4270:

Computed with PROJ using the EPSG default operation: unavailable until proj_trans is called.
AxisValueUnit
Longitude53.838927°
Latitude24.838248°

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) + Nahrwan 1967 to WGS 84 (3) + axis order change (2D)44 mUnited Arab Emirates (UAE) - onshore and offshore. Abu Dhabi, Dubai, Sharjah, Umm al Qaywayn, Al Fujairah, Ras al Khaymah.
axis order change (2D) + Nahrwan 1967 to WGS 84 (11) + axis order change (2D)5 mUnited Arab Emirates (UAE) - Abu Dhabi onshore and offshore.
axis order change (2D) + Nahrwan 1967 to WGS 84 (12) + axis order change (2D)0.15 mUnited Arab Emirates (UAE) - Abu Dhabi onshore.
axis order change (2D) + Nahrwan 1967 to WGS 84 (5) + axis order change (2D)1 mQatar - offshore.
axis order change (2D) + Nahrwan 1967 to WGS 84 (7) + axis order change (2D)2 mUnited Arab Emirates (UAE) - Abu Dhabi offshore.
axis order change (2D) + Nahrwan 1967 to WGS 84 (15) + axis order change (2D)1 mUnited Arab Emirates (UAE) - Abu Dhabi onshore east of 54°E.
axis order change (2D) + Nahrwan 1967 to WGS 84 (14) + axis order change (2D)1 mUnited Arab Emirates (UAE) - Abu Dhabi onshore west of 54°E.
axis order change (2D) + Nahrwan 1967 to WGS 84 (9) + axis order change (2D)5 mUnited Arab Emirates (UAE) - Dubai offshore - Falah, Fateh and Rashid oilfields.

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 +a=6378249.145 +rf=293.465 +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 +a=6378249.145 +rf=293.465 +towgs84=-249,-156,381 +no_defs

Datum shift from Nahrwan 1967 to WGS 84 (3) (EPSG accuracy 44 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["Nahrwan 1967", DATUM["Nahrwan 1967", ELLIPSOID["Clarke 1880 (RGS)",6378249.145,293.465, 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["Arabian Gulf; Qatar - offshore; United Arab Emirates (UAE) - Abu Dhabi; Dubai; Sharjah; Ajman; Fujairah; Ras Al Kaimah; Umm Al Qaiwain - onshore and offshore."], BBOX[22.63,50.55,27.05,57.13]], ID["EPSG",4270]]

Downloads

FAQ

What is EPSG:4270?

EPSG:4270 (Nahrwan 1967) is a geographic 2D coordinate reference system on the Nahrwan 1967 datum with coordinates in degrees. Area of use: Arabian Gulf; Qatar - offshore; United Arab Emirates (UAE) - Abu Dhabi; Dubai; Sharjah; Ajman; Fujairah; Ras Al Kaimah; Umm Al Qaiwain - onshore and offshore.

Where can EPSG:4270 be used?

Its area of use is: Arabian Gulf; Qatar - offshore; United Arab Emirates (UAE) - Abu Dhabi; Dubai; Sharjah; Ajman; Fujairah; Ras Al Kaimah; Umm Al Qaiwain - onshore and offshore.

What is the axis order of EPSG:4270?

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:4270 to WGS 84?

The most accurate EPSG transformation listed here is “axis order change (2D) + Nahrwan 1967 to WGS 84 (12) + axis order change (2D)”, with a stated accuracy of 0.15 m for United Arab Emirates (UAE) - Abu Dhabi onshore.. Always check the area of use before applying it.

Coordinate systems

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Tools

References

  1. IOGP. EPSG Geodetic Parameter Dataset, epsg.org/crs_4270.
  2. PROJ 9.5.1 / pyproj 3.7.2, used to compute every value on this page.

Cite this page

GeoCAD Bridge. “EPSG:4270 — Nahrwan 1967.” GeoCAD Bridge EPSG Library, updated 2026-10-05. https://www.geocadbridge.com/epsg/4270/