EPSG Library · Egypt

EPSG:4229 — Egypt 1907

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

Summary

EPSG:4229 (Egypt 1907) is a geographic 2D coordinate reference system on the Egypt 1907 datum with coordinates in degrees. Area of use: Egypt - onshore and offshore.

Type: geographic 2D
Datum: Egypt 1907
Units: degree
Axes: Lat, Lon

Definition

EPSG:4229 as published in the EPSG Dataset (PROJ 9.5.1).
Property	Value
EPSG code	EPSG:4229
Name	Egypt 1907
Type	Geographic 2d CRS
Datum	Egypt 1907
Ellipsoid	Helmert 1906 (a = 6,378,200.000 m, 1/f = 298.3)
Prime meridian	Greenwich
Axes	Geodetic latitude (Lat, north, degree); Geodetic longitude (Lon, east, degree)
Scope	Geodesy.
Bounding box	24.7° to 37.91° longitude, 21.89° to 33.82° latitude

Area of use

Egypt - onshore and offshore.

Example coordinates

A WGS 84 point at longitude 31.305°, latitude 27.855° (inside the area of use) has these coordinates in EPSG:4229:

Computed with PROJ using the EPSG default operation: unavailable until proj_trans is called.
Axis	Value	Unit
Longitude	31.303346	°
Latitude	27.854865	°

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) + Egypt 1907 to WGS 84 (4) + axis order change (2D)	1.2 m	Egypt - onshore and offshore.
axis order change (2D) + Egypt 1907 to WGS 72 (1) + WGS 72 to WGS 84 (1) + axis order change (2D)	7 m	Egypt - onshore and offshore.
axis order change (2D) + Egypt 1907 to WGS 84 (1) + axis order change (2D)	11 m	Egypt - onshore and offshore.

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=helmert +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=helmert +towgs84=-130,110,-13 +no_defs

Datum shift from Egypt 1907 to WGS 84 (1) (EPSG accuracy 11 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["Egypt 1907", DATUM["Egypt 1907", ELLIPSOID["Helmert 1906",6378200,298.3, 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["Egypt - onshore and offshore."], BBOX[21.89,24.7,33.82,37.91]], ID["EPSG",4229]]

Downloads

4229.prj — ESRI WKT for shapefiles
4229.wkt — OGC WKT2:2019

FAQ

What is EPSG:4229?

EPSG:4229 (Egypt 1907) is a geographic 2D coordinate reference system on the Egypt 1907 datum with coordinates in degrees. Area of use: Egypt - onshore and offshore.

Where can EPSG:4229 be used?

Its area of use is: Egypt - onshore and offshore.

What is the axis order of EPSG:4229?

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:4229 to WGS 84?

The most accurate EPSG transformation listed here is “axis order change (2D) + Egypt 1907 to WGS 84 (4) + axis order change (2D)”, with a stated accuracy of 1.2 m for Egypt - onshore and offshore.. Always check the area of use before applying it.

Coordinate systems

Articles

Tools

References

IOGP. EPSG Geodetic Parameter Dataset, epsg.org/crs_4229.
PROJ 9.5.1 / pyproj 3.7.2, used to compute every value on this page.

Cite this page

GeoCAD Bridge. “EPSG:4229 — Egypt 1907.” GeoCAD Bridge EPSG Library, updated 2026-10-05. https://www.geocadbridge.com/epsg/4229/