Convert NGO 1948 to ETRS89-NOR [EUREF89]

Convert coordinates from NGO 1948 (EPSG:4273) to ETRS89-NOR [EUREF89] (EPSG:10875) — 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-4273-to-epsg-10875

Official EPSG transformation from NGO 1948 to ETRS89-NOR [EUREF89]

The EPSG Geodetic Parameter Dataset defines 1 transformation between NGO 1948 (EPSG:4273) and ETRS89-NOR [EUREF89] (EPSG:10875). Its parameters, accuracy and area of use are listed below.

NGO 1948 to ETRS89-NOR [EUREF89] (1)

EPSG:1653±3 m

Method:: Position Vector transformation (geog2D domain)
Area of use:: Norway - onshore
Scope:: Transformation of coordinates at 3m level of accuracy.

Parameter	Value	Unit
X-axis translation(tx)	278.3	metre
Y-axis translation(ty)	93	metre
Z-axis translation(tz)	474.5	metre
X-axis rotation(rx)	7.889	arc-second
Y-axis rotation(ry)	0.05	arc-second
Z-axis rotation(rz)	-6.61	arc-second
Scale difference(ds)	6.21	parts per million

May be taken as approximate transformation NGO 1948 to WGS 84 - see code 1654.

Convert EPSG:4273 to EPSG:10875 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4273", "EPSG:10875", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4273 — NGO 1948

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

+proj=longlat +a=6377492.018 +rf=299.1528128 +towgs84=278.3,93,474.5,7.889,0.05,-6.61,6.21 +no_defs +type=crs

More about EPSG:4273 →

Target: EPSG:10875 — ETRS89-NOR [EUREF89]

geographic system using latitude and longitude on an ellipsoid · Area of use: Norway

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:10875 →

Frequently asked questions

How accurate is converting NGO 1948 to ETRS89-NOR [EUREF89]?: The most accurate official EPSG transformation between these systems is accurate to about ±3 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:10875 to EPSG:4273 →