Convert Nord Sahara 1959 to WGS 84

Convert coordinates from Nord Sahara 1959 (EPSG:4307) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4307-to-epsg-4326

Official EPSG transformations from Nord Sahara 1959 to WGS 84

The EPSG Geodetic Parameter Dataset defines 11 transformations between Nord Sahara 1959 (EPSG:4307) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

Nord Sahara 1959 to WGS 84 (9)

EPSG:5660±1 mBest accuracy

Method:: Position Vector transformation (geog2D domain)
Area of use:: Algeria
Scope:: Transformation of coordinates at 1m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	-209.3622	metre
Y-axis translation(ty)	-87.8162	metre
Z-axis translation(tz)	404.6198	metre
X-axis rotation(rx)	0.0046	arc-second
Y-axis rotation(ry)	3.4784	arc-second
Z-axis rotation(rz)	0.5805	arc-second
Scale difference(ds)	-1.4547	parts per million

Derived in 2006 at 45 points in north and central Algeria. Accuracy at 75 common points better than 1m.

Nord Sahara 1959 to WGS 84 (11)

EPSG:10296±1 m

Method:: Position Vector transformation (geog2D domain)
Area of use:: Algeria
Scope:: Spatial referencing.

Parameter	Value	Unit
X-axis translation(tx)	-267.407	metre
Y-axis translation(ty)	-47.068	metre
Z-axis translation(tz)	446.357	metre
X-axis rotation(rx)	-0.179423	arc-second
Y-axis rotation(ry)	5.577661	arc-second
Z-axis rotation(rz)	-1.27762	arc-second
Scale difference(ds)	1.204866	parts per million

Given by information source in direction WGS 84 to Nord Sahara 1959. Defines official relationship between WGS 84 and national geodetic system; epoch unspecified. Derived at approximately 40 points in northern Algeria; accuracy applies only to this area.

Nord Sahara 1959 to WGS 84 (4)

EPSG:1815±5 m

Method:: Position Vector transformation (geog2D domain)
Area of use:: Algeria - District 3
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-152.9	metre
Y-axis translation(ty)	43.8	metre
Z-axis translation(tz)	358.3	metre
X-axis rotation(rx)	2.714	arc-second
Y-axis rotation(ry)	1.386	arc-second
Z-axis rotation(rz)	-2.788	arc-second
Scale difference(ds)	-6.743	parts per million

Used by BP in District 3 and In Salah Gas. May be taken as a transformation to RGSH2020 - see CT 10339.

Nord Sahara 1959 to WGS 84 (8)

EPSG:5630±5 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Algeria - Ahnet licence area
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-168.52	metre
Y-axis translation(ty)	-72.05	metre
Z-axis translation(tz)	304.3	metre

Derived at 1 station (L38). May be taken as a transformation to RGSH2020 - see CT 10343.

Nord Sahara 1959 to WGS 84 (7)

EPSG:15874±5 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Algeria - Hassi Mouina licence area
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-169.559	metre
Y-axis translation(ty)	-72.34	metre
Z-axis translation(tz)	303.102	metre

Derived at 11 stations throughout blocks 317b, 319b, 321b and 322b. Network based on station P4 (horizontal) and benchmark RN51 (vertical) using EGM96 geoid height. Used by Equinor in Hassi Mouina. May be taken as a transformation to RGSH2020 (CT 10342).

Nord Sahara 1959 to WGS 84 (3)

EPSG:8562±9 m

Method:: Concatenated operation
Area of use:: Algeria - Hassi Messaoud
Scope:: Oil and gas exploration and production.

Nord Sahara 1959 to WGS 72BE (1) (null)
WGS 72BE to WGS 84 (1) (null)

Derived at IGN monument CFP19 using Transit. Can be implemented as a single 7-param Position Vector transformation with parameter values of dX=-156.5m dY=-87.2m dZ=+287.8m; rX=rY=0 rZ=+0.814sec; dS=-0.38ppm.

Nord Sahara 1959 to WGS 84 (1)

EPSG:1253±44 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Algeria - onshore
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-186	metre
Y-axis translation(ty)	-93	metre
Z-axis translation(tz)	310	metre

Derived at 3 stations. Accuracy 25m in each axis.

Nord Sahara 1959 to WGS 84 (2)

EPSG:1255±44 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Algeria - north of 32°N
Scope:: Military survey.

Parameter	Value	Unit
X-axis translation(tx)	-123	metre
Y-axis translation(ty)	-206	metre
Z-axis translation(tz)	219	metre

Derived at 2 stations. Accuracy 25m in each axis. CAUTION: DMA describe Source CRS as Voirol 1960. OGP believes that the data used in the derivation of these parameters contains a blunder. We recommend using CT North Sahara 1959 to WGS84 (1) (code 1253).

Nord Sahara 1959 to WGS 84 (5)

EPSG:1816±100 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Algeria - In Amenas
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-95.7	metre
Y-axis translation(ty)	10.2	metre
Z-axis translation(tz)	158.9	metre

Derived at astro station central to concession. Significant and varying differences (>100m) at 4 neighbouring astro stations. May be taken as a transformation to RGSH2020 - see CT 10340.

Nord Sahara 1959 to WGS 84 (6)

EPSG:1817±100 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Algeria - Hassi Bir Reikaz
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-165.914	metre
Y-axis translation(ty)	-70.607	metre
Z-axis translation(tz)	305.009	metre

Derived at astro station Guerrara. May be taken as a transformation to RGSH2020 - see CT 10341.

Nord Sahara 1959 to WGS 84 (10)

EPSG:7442±100 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Algeria - Ain Tsila
Scope:: Oil and gas exploration and production.

Parameter	Value	Unit
X-axis translation(tx)	-181.7	metre
Y-axis translation(ty)	64.7	metre
Z-axis translation(tz)	247.2	metre

Derived at 1 astro station central to concession. Significant and varying differences (>100m) known to exist in neighbouring astro stations. May be taken as a transformation to RGSH2020 - see CT 10344.

Convert EPSG:4307 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4307", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4307 — Nord Sahara 1959

geographic system using latitude and longitude on an ellipsoid · Area of use: Algeria

+proj=longlat +a=6378249.145 +rf=293.465 +towgs84=-267.407,-47.068,446.357,-0.179423,5.577661,-1.27762,1.204866 +no_defs +type=crs

More about EPSG:4307 →

Target: EPSG:4326 — WGS 84

geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)

+proj=longlat +datum=WGS84 +no_defs +type=crs

More about EPSG:4326 →

Frequently asked questions

How accurate is converting Nord Sahara 1959 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±1 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation in a desktop GIS.
Does my data leave the browser when I use this converter?: No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.

Need the reverse? Convert EPSG:4326 to EPSG:4307 →