Convert NKG_ETRF14 to SWEREF99

Convert coordinates from NKG_ETRF14 (EPSG:10805) to SWEREF99 (EPSG:4976) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (x, y)

Output (x, y)

Direct link to this transformation: epsgtransform.com/transform/epsg-10805-to-epsg-4976

Official EPSG transformation from NKG_ETRF14 to SWEREF99

The EPSG Geodetic Parameter Dataset defines 1 transformation between NKG_ETRF14 (EPSG:10805) and SWEREF99 (EPSG:4976). Its parameters, accuracy and area of use are listed below.

NKG_ETRF14 to SWEREF99 (1)

EPSG:10813±0.001 m

Method:: Position Vector (geocen) & Geocen translations NEU velocities (gtg)
Area of use:: Sweden
Scope:: Geodesy.

Parameter	Value	Unit
X-axis translation	0.03054	metre
Y-axis translation	0.04606	metre
Z-axis translation	-0.07944	metre
X-axis rotation	1.41958	milliarc-second
Y-axis rotation	0.15132	milliarc-second
Z-axis rotation	1.50337	milliarc-second
Scale difference	3.002	parts per billion
Source epoch	2000	year
Target epoch	1999.5	year

Grid file: NKG_RF17vel.tif

Nordic Geodetic Commission (NKG) 2020 transformation. Replaces NKG2008 transformation, but for coordinates originating before 2021-02-07 the NKG2008 transformation should be used. Because the difference in coordinates between NKG_ETRF14 and SWEREF99 is small (under a decimetre), although the interpolation CRS is given as NKG_ETRF14, any realization of ETRS89 (including ETRF2014 and SWEREF99) may be used as the interpolation CRS. Scale difference in ppb where 1/billion = 1E-9.

Convert EPSG:10805 to EPSG:4976 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:10805", "EPSG:4976", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:10805 — NKG_ETRF14

geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: Europe - Nordic and Baltic countries

+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs

More about EPSG:10805 →

Target: EPSG:4976 — SWEREF99

geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: Sweden

+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs

More about EPSG:4976 →

Frequently asked questions

How accurate is converting NKG_ETRF14 to SWEREF99?: The most accurate official EPSG transformation between these systems is accurate to about ±0.001 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:4976 to EPSG:10805 →