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Convert ETRS89 to GS-IRF

Convert coordinates from ETRS89 (EPSG:4258) to GS-IRF (EPSG:10256) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4258-to-epsg-10256

Official EPSG transformation from ETRS89 to GS-IRF

The EPSG Geodetic Parameter Dataset defines 1 transformation between ETRS89 (EPSG:4258) and GS-IRF (EPSG:10256). Its parameters, accuracy and area of use are listed below.

ETRS89 to GS-IRF (1)

EPSG:10259±0.5 m
Method:
NTv2
Area of use:
Denmark - onshore Jutland, Funen, Zealand and Lolland
Scope:
Intermediate stage in transformations - not used otherwise.

Grid file: gs_2022.gsb

In conjunction with the GS LCC map projection (code 10257) applied to GS-IRF (code 10256), enables transformation of coordinates between the historic Generalstabens System and ETRS89. File is also available in GeoTIFF format (gs_2022.tif).

Convert EPSG:4258 to EPSG:10256 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4258", "EPSG:10256", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4258 — ETRS89

geographic system using latitude and longitude on an ellipsoid · Area of use: Europe - ETRF by country

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:4258 →

Target: EPSG:10256 — GS-IRF

geographic system using latitude and longitude on an ellipsoid · Area of use: Denmark - onshore Jutland, Funen, Zealand and Lolland

+proj=longlat +a=6377019.27 +rf=300 +no_defs +type=crs
More about EPSG:10256 →

Frequently asked questions

How accurate is converting ETRS89 to GS-IRF?
The most accurate official EPSG transformation between these systems is accurate to about ±0.5 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) 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:10256 to EPSG:4258 →