Convert Helle 1954 to WGS 84

Convert coordinates from Helle 1954 (EPSG:4660) 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-4660-to-epsg-4326

Official EPSG transformation from Helle 1954 to WGS 84

The EPSG Geodetic Parameter Dataset defines 1 transformation between Helle 1954 (EPSG:4660) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.

Helle 1954 to WGS 84 (1)

EPSG:1957±1 m

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

Parameter	Value	Unit
X-axis translation(tx)	982.6087	metre
Y-axis translation(ty)	552.753	metre
Z-axis translation(tz)	-540.873	metre
X-axis rotation(rx)	32.39344	microradian
Y-axis rotation(ry)	-153.25684	microradian
Z-axis rotation(rz)	-96.2266	microradian
Scale difference(ds)	16.805	parts per million

Derived at 3 stations. Residuals under 1m.

Convert EPSG:4660 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4660", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4660 — Helle 1954

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

+proj=longlat +ellps=intl +towgs84=982.6087,552.753,-540.873,6.68162662527694,-31.6114924086422,-19.8481610048168,16.805 +no_defs +type=crs

More about EPSG:4660 →

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 Helle 1954 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:4660 →