Convert ITRF97 to IGS97

Convert coordinates from ITRF97 (EPSG:4918) to IGS97 (EPSG:9001) — 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-4918-to-epsg-9001

Official EPSG transformation from ITRF97 to IGS97

The EPSG Geodetic Parameter Dataset defines 1 transformation between ITRF97 (EPSG:4918) and IGS97 (EPSG:9001). Its parameters, accuracy and area of use are listed below.

ITRF97 to IGS97 (1)

EPSG:9028±0 m

Method:: Time-specific Position Vector transform (geocen)
Area of use:: World
Scope:: Geodesy.

Parameter	Value	Unit
X-axis translation(tx)	0	centimetre
Y-axis translation(ty)	0	centimetre
Z-axis translation(tz)	0	centimetre
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	parts per billion
epoch	1997	year

Scale difference in ppb where 1/billion = 1E-9 or nm/m. IGS97 is by definition aligned with ITRF97.

Convert EPSG:4918 to EPSG:9001 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4918", "EPSG:9001", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4918 — ITRF97

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

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

More about EPSG:4918 →

Target: EPSG:9001 — IGS97

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

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

More about EPSG:9001 →

Frequently asked questions

How accurate is converting ITRF97 to IGS97?: The most accurate official EPSG transformation between these systems is accurate to about ±0 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:9001 to EPSG:4918 →