Convert Sierra Leone 1968 to WGS 84

Convert coordinates from Sierra Leone 1968 (EPSG:4175) 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-4175-to-epsg-4326

Official EPSG transformation from Sierra Leone 1968 to WGS 84

The EPSG Geodetic Parameter Dataset defines 1 transformation between Sierra Leone 1968 (EPSG:4175) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.

Sierra Leone 1968 to WGS 84 (1)

EPSG:1614±26 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Sierra Leone - onshore
Scope:: Transformation of coordinates at 25m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	-88	metre
Y-axis translation(ty)	4	metre
Z-axis translation(tz)	101	metre

Determined at 8 stations, accuracy +/- 15m in each axis. Info. Source has the source CRS as Sierra Leone 1960. Sierra Leone 1968 is a readjustment of the 1960 network: coordinates changed by less than 3 metres.

Convert EPSG:4175 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4175", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4175 — Sierra Leone 1968

geographic system using latitude and longitude on an ellipsoid · Area of use: Sierra Leone - onshore

+proj=longlat +a=6378249.145 +rf=293.465 +towgs84=-88,4,101,0,0,0,0 +no_defs +type=crs

More about EPSG:4175 →

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 Sierra Leone 1968 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±26 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:4175 →