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Convert Astro DOS 71 to WGS 84

Convert coordinates from Astro DOS 71 (EPSG:4710) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4710-to-epsg-4326

Official EPSG transformations from Astro DOS 71 to WGS 84

The EPSG Geodetic Parameter Dataset defines 2 transformations between Astro DOS 71 (EPSG:4710) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

Astro DOS 71 to WGS 84 (2)

EPSG:7894±1 mBest accuracy
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.
ParameterValueUnit
X-axis translation(tx)-323.65metre
Y-axis translation(ty)551.39metre
Z-axis translation(tz)-491.22metre

Parameter values from Astro DOS 71 to SHGD2015 (1) (tfm code 7893). Assumes SHGD2015 and WGS 84 can be considered the same to within the accuracy of the transformation.

Astro DOS 71 to WGS 84 (1)

EPSG:15798±44 m
Method:
Geocentric translations (geog2D domain)
Area of use:
St Helena - St Helena Island
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-320metre
Y-axis translation(ty)550metre
Z-axis translation(tz)-494metre

Derived at 1 satellite station. Accuracy 25m in each axis.

Convert EPSG:4710 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4710", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4710 — Astro DOS 71

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

+proj=longlat +ellps=intl +no_defs +type=crs
More about EPSG:4710 →

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 Astro DOS 71 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:4710 →