Convert coordinates from AGD84 (EPSG:4203) to GDA94 (EPSG:4283) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 4 transformations between AGD84 (EPSG:4203) and GDA94 (EPSG:4283). Each applies to a specific area — pick the one whose area of use covers your data.
Grid file: wa_0700.gsb
Replaces AGD84 to GDA94 (3) (code 1559) and then replaced by AGD84 to GDA94 (5) (code 1804). Input expects longitudes to be positive west; EPSG GeogCRS AGD84 (code 4203) and GDA94 (code 4283) both have longitudes positive east.
Grid file: National 84 (02.07.01).gsb
Replaces AGD84 to GDA94 (4) (code 1593) which itself replaced variant 3 (code 1559). Input expects longitudes to be + west; EPSG GeogCRS AGD84 (code 4203) and GDA94 (code 4283) both have longitudes positive east. May be used as tfm to WGS 84 - see 15785
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -117.763 | metre |
| Y-axis translation(ty) | -51.51 | metre |
| Z-axis translation(tz) | 139.061 | metre |
| X-axis rotation(rx) | -0.292 | arc-second |
| Y-axis rotation(ry) | -0.443 | arc-second |
| Z-axis rotation(rz) | -0.277 | arc-second |
| Scale difference(ds) | -0.191 | parts per million |
Replaces AGD84 to WGS 84 (2) (code 1236). May be taken as approximate transformation AGD84 to WGS 84 - see code 1669. Note: although applicable nationwide, AGD84 officially adopted only in Queensland, South Australia and Western Australia.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -128.5 | metre |
| Y-axis translation(ty) | -53 | metre |
| Z-axis translation(tz) | 153.4 | metre |
Derived at 327 stations. May be taken as approximate transformation AGD84 to WGS 84 - see code 15789. For higher accuracy use AGD84 to GDA94 (2) (code 1280). Note: AGD84 officially adopted only in Queensland, South Australia and Western Australia.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4203", "EPSG:4283", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)geographic system using latitude and longitude on an ellipsoid · Area of use: Australia - AGD84
+proj=longlat +ellps=aust_SA +no_defs +type=crsMore about EPSG:4203 →
geographic system using latitude and longitude on an ellipsoid · Area of use: Australia - GDA
+proj=longlat +ellps=GRS80 +no_defs +type=crsMore about EPSG:4283 →