Skip to content
transform

Convert ITRF2005 to GDA94

Convert coordinates from ITRF2005 (EPSG:4896) to GDA94 (EPSG:4938) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4896-to-epsg-4938

Official EPSG transformation from ITRF2005 to GDA94

The EPSG Geodetic Parameter Dataset defines 1 transformation between ITRF2005 (EPSG:4896) and GDA94 (EPSG:4938). Its parameters, accuracy and area of use are listed below.

ITRF2005 to GDA94 (1)

EPSG:6277±0.03 m
Method:
Time-dependent Coordinate Frame rotation (geocen)
Area of use:
Australia - onshore and EEZ
Scope:
Geodesy.
ParameterValueUnit
X-axis translation(tx)-79.73millimetre
Y-axis translation(ty)-6.86millimetre
Z-axis translation(tz)38.03millimetre
X-axis rotation(rx)-0.0351milliarc-second
Y-axis rotation(ry)2.1211milliarc-second
Z-axis rotation(rz)2.1411milliarc-second
Scale difference(ds)6.636parts per billion
rate tx2.25millimetres per year
rate ty-0.62millimetres per year
rate tz-0.56millimetres per year
rate rx1.4707milliarc-seconds per year
rate ry1.1443milliarc-seconds per year
rate rz1.1701milliarc-seconds per year
rate ds0.294parts per billion per year
epoch1994year

RMS residuals 4mm north, 8mm east and 30mm vertical, maximum residuals 10mm north, 17 mm east and 61mm vertical. Scale difference in ppb and scale difference rate in ppb/yr where 1/billion = 1E-9 or nm/m.

Convert EPSG:4896 to EPSG:4938 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4896", "EPSG:4938", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4896ITRF2005

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

+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs
More about EPSG:4896

Target: EPSG:4938GDA94

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

+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs
More about EPSG:4938

Frequently asked questions

How accurate is converting ITRF2005 to GDA94?
The most accurate official EPSG transformation between these systems is accurate to about ±0.03 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:4938 to EPSG:4896