EPSG:CODE

GDA94 to GDA2020 (1)

EPSG:4283 → EPSG:7844

Coordinate Reference Systems

Source CRS
EPSG:4283
GDA94
Geographic 2D
Target CRS
EPSG:7844
GDA2020
Geographic 2D

Transform Coordinates

Remarks

Scale difference in ppb where 1/billion = 1E-9. See CT codes 8444-46 for NTv2 method giving equivalent results for Christmas Island, Cocos Islands and Australia respectively. See CT code 8447 for alternative including distortion model for Australia only.

Frequently Asked Questions

How do I convert GDA94 to GDA2020 coordinates?

Use the coordinate transformation tool above to convert GDA94 (EPSG:4283) to GDA2020 (EPSG:7844). Enter your source coordinates and click Transform. This uses the Coordinate Frame rotation (geog2D domain) method with 0.01m accuracy.

How do I transform GDA94 to GDA2020 using Proj4js?

Use proj4.defs to define both EPSG:4283 and EPSG:7844, then call proj4(source, target, [x, y]) to convert coordinates programmatically.

What is the accuracy of the GDA94 to GDA2020 transformation?

This transformation (EPSG:8048) has an accuracy of 0.01m using the Coordinate Frame rotation (geog2D domain) method. Area of use: Australia - GDA.