Convert St. Helena Tritan to WGS 84

Convert coordinates from St. Helena Tritan (EPSG:7881) 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-7881-to-epsg-4326

Official EPSG transformation from St. Helena Tritan to WGS 84

The EPSG Geodetic Parameter Dataset defines 1 transformation between St. Helena Tritan (EPSG:7881) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.

St. Helena Tritan to WGS 84 (1)

EPSG:7898±1 m

Method:: Geocentric translations (geog2D domain)
Area of use:: St Helena - St Helena Island
Scope:: (null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Parameter	Value	Unit
X-axis translation(tx)	-0.077	metre
Y-axis translation(ty)	0.079	metre
Z-axis translation(tz)	0.086	metre

Parameter values from Tritan St. Helena to SHGD2015 (1) (tfm code 7897). Assumes Tritan St. Helena and SHGD2015 can be considered the same to within the accuracy of the transformation.

Convert EPSG:7881 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:7881", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:7881 — St. Helena Tritan

geographic system using latitude and longitude on an ellipsoid · Area of use: St Helena - St Helena Island

+proj=longlat +ellps=WGS84 +towgs84=-0.077,0.079,0.086,0,0,0,0 +no_defs +type=crs

More about EPSG:7881 →

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 St. Helena Tritan 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:7881 →