Convert AGD66 to GDA2020

Convert coordinates from AGD66 (EPSG:4202) to GDA2020 (EPSG:7844) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4202-to-epsg-7844

Official EPSG transformation from AGD66 to GDA2020

The EPSG Geodetic Parameter Dataset defines 1 transformation between AGD66 (EPSG:4202) and GDA2020 (EPSG:7844). Its parameters, accuracy and area of use are listed below.

AGD66 to GDA2020 (1)

EPSG:9185±0.05 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Australia - Australian Capital Territory
Scope:: Geodesy.

Parameter	Value	Unit
X-axis translation(tx)	-136.9703	metre
Y-axis translation(ty)	-37.5638	metre
Z-axis translation(tz)	124.4242	metre
X-axis rotation(rx)	-0.25676	arc-second
Y-axis rotation(ry)	-0.42966	arc-second
Z-axis rotation(rz)	-0.30077	arc-second
Scale difference(ds)	-4.61966	parts per million

This transformation is for users wanting to apply a 7-parameter conformal transformation from AGD66 to GDA2020 in the ACT.

Convert EPSG:4202 to EPSG:7844 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4202", "EPSG:7844", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4202 — AGD66

geographic system using latitude and longitude on an ellipsoid · Area of use: Australasia - Australia and PNG - AGD66

+proj=longlat +ellps=aust_SA +no_defs +type=crs

More about EPSG:4202 →

Target: EPSG:7844 — GDA2020

geographic system using latitude and longitude on an ellipsoid · Area of use: Australia - GDA

+proj=longlat +ellps=GRS80 +no_defs +type=crs

More about EPSG:7844 →

Frequently asked questions

How accurate is converting AGD66 to GDA2020?: The most accurate official EPSG transformation between these systems is accurate to about ±0.05 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:7844 to EPSG:4202 →