Convert ITRF2020 to KSA-GRF17

Convert coordinates from ITRF2020 (EPSG:9988) to KSA-GRF17 (EPSG:9331) — 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-9331

Official EPSG transformation from ITRF2020 to KSA-GRF17

The EPSG Geodetic Parameter Dataset defines 1 transformation between ITRF2020 (EPSG:9988) and KSA-GRF17 (EPSG:9331). Its parameters, accuracy and area of use are listed below.

ITRF2020 to KSA-GRF17 (1)

EPSG:10777±0.001 m

Method:: Time-dependent Position Vector tfm (geocentric)
Area of use:: Saudi Arabia
Scope:: Geodesy.

Parameter	Value	Unit
X-axis translation(tx)	-1.4	millimetre
Y-axis translation(ty)	-1.1	millimetre
Z-axis translation(tz)	1.8	millimetre
X-axis rotation(rx)	0	milliarc-second
Y-axis rotation(ry)	0	milliarc-second
Z-axis rotation(rz)	0	milliarc-second
Scale difference(ds)	-0.42	parts per billion
rate tx	0	millimetres per year
rate ty	-0.1	millimetres per year
rate tz	0.2	millimetres per year
rate rx	-1.199	milliarc-seconds per year
rate ry	0.107	milliarc-seconds per year
rate rz	-1.468	milliarc-seconds per year
rate ds	0	parts per billion per year
epoch	2017	year

Derived by combining the IERS transformation from ITRF2020 to ITRF2014 at epoch 2017.0 (code 9991) with ITRF2014 to KSA-GRF17 transformation (code 9334).

Convert EPSG:9988 to EPSG:9331 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:9988", "EPSG:9331", 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:9331 — KSA-GRF17

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

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

More about EPSG:9331 →

Frequently asked questions

How accurate is converting ITRF2020 to KSA-GRF17?: 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:9331 to EPSG:9988 →