Convert Nord Sahara 1959 to RGSH2020

Convert coordinates from Nord Sahara 1959 (EPSG:4307) to RGSH2020 (EPSG:10299) — 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-10299

Official EPSG transformations from Nord Sahara 1959 to RGSH2020

The EPSG Geodetic Parameter Dataset defines 6 transformations between Nord Sahara 1959 (EPSG:4307) and RGSH2020 (EPSG:10299). Each applies to a specific area — pick the one whose area of use covers your data.

Nord Sahara 1959 to RGSH2020 (1)

EPSG:10339±5 mBest accuracy

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

Parameter values taken from Nord Sahara 1959 to WGS 84 (4) (code 1815) assuming that RGSH2020 is coincident with WGS 84 within the accuracy of the transformation. CT 1815 used by BP in District 3 and In Salah Gas.

Nord Sahara 1959 to RGSH2020 (4)

EPSG:10342±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

Parameter values taken from Nord Sahara 1959 to WGS 84 (7) (code 15874) assuming that RGSH2020 is coincident with WGS 84 within the accuracy of the transformation. Derived at 11 stations. CT 15874 used by Equinor in Hassi Mouina.

Nord Sahara 1959 to RGSH2020 (5)

EPSG:10343±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

Parameter values taken from Nord Sahara 1959 to WGS 84 (8) (code 5630) assuming that RGSH2020 is coincident with WGS 84 within the accuracy of the transformation. Derived at 1 station (L38).

Nord Sahara 1959 to RGSH2020 (2)

EPSG:10340±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

Parameter values taken from Nord Sahara 1959 to WGS 84 (5) (code 1816) assuming that RGSH2020 is coincident with WGS 84 within the accuracy of the transformation. Significant and varying differences (>100m) at 4 neighbouring astro stations.

Nord Sahara 1959 to RGSH2020 (3)

EPSG:10341±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

Parameter values taken from Nord Sahara 1959 to WGS 84 (6) (code 1817) assuming that RGSH2020 is coincident with WGS 84 within the accuracy of the transformation. Derived at astro station Guerrara.

Nord Sahara 1959 to RGSH2020 (6)

EPSG:10344±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

Parameter values taken from Nord Sahara 1959 to WGS 84 (10) (code 7442) assuming that RGSH2020 is coincident with WGS 84 within the accuracy of the transformation. Significant and varying differences (>100m) known to exist in neighbouring astro stations.

Convert EPSG:4307 to EPSG:10299 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4307", "EPSG:10299", 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:10299 — RGSH2020

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

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:10299 →

Frequently asked questions

How accurate is converting Nord Sahara 1959 to RGSH2020?: The most accurate official EPSG transformation between these systems is accurate to about ±5 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:10299 to EPSG:4307 →