Convert ITRF2020 to GR96(2021)

Convert coordinates from ITRF2020 (EPSG:9988) to GR96(2021) (EPSG:10957) — 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-9988-to-epsg-10957

Official EPSG transformation from ITRF2020 to GR96(2021)

The EPSG Geodetic Parameter Dataset defines 1 transformation between ITRF2020 (EPSG:9988) and GR96(2021) (EPSG:10957). Its parameters, accuracy and area of use are listed below.

ITRF2020 to GR96(2021) (1)

EPSG:10960±0.1 m

Method:: Time-dependent Coordinate Frame rotation (geocen)
Area of use:: Greenland
Scope:: Geodesy.

Parameter	Value	Unit
X-axis translation(tx)	-0.30031	metre
Y-axis translation(ty)	-1.17512	metre
Z-axis translation(tz)	-0.30654	metre
X-axis rotation(rx)	0.041614	arc-second
Y-axis rotation(ry)	-0.026303	arc-second
Z-axis rotation(rz)	-0.011214	arc-second
Scale difference(ds)	-0.01626	parts per million
rate tx	0	metres per year
rate ty	0	metres per year
rate tz	0	metres per year
rate rx	0.000045	arc-seconds per year
rate ry	-0.000666	arc-seconds per year
rate rz	-0.000098	arc-seconds per year
rate ds	0	parts per million per year
epoch	2021.6164	year

Derived from the IGS20 coordinates at epoch 2021.6164 of 7 stations including the four passive stations used to define GR96(1996). Validated at 26 other stations.

Convert EPSG:9988 to EPSG:10957 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:9988", "EPSG:10957", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:9988 — ITRF2020

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

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

More about EPSG:9988 →

Target: EPSG:10957 — GR96(2021)

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

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

More about EPSG:10957 →

Frequently asked questions

How accurate is converting ITRF2020 to GR96(2021)?: The most accurate official EPSG transformation between these systems is accurate to about ±0.1 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:10957 to EPSG:9988 →