Convert coordinates from Cape (EPSG:4222) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 2 transformations between Cape (EPSG:4222) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -136 | metre |
| Y-axis translation(ty) | -108 | metre |
| Z-axis translation(tz) | -292 | metre |
Derived at 5 stations. Accuracy 3m, 6m and 6m in X, Y and Z axes.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -134.73 | metre |
| Y-axis translation(ty) | -110.92 | metre |
| Z-axis translation(tz) | -292.66 | metre |
Parameter values are from Cape to Hartebeesthoek94 (1) (code 1504) assuming that Hartebeesthoek94 and WGS 84 are equivalent within the accuracy of the transformation. Residuals should not exceed 15 metres.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4222", "EPSG:4326", 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: Africa - Botswana, Eswatini, Lesotho and South Africa
+proj=longlat +a=6378249.145 +rf=293.4663077 +no_defs +type=crsMore about EPSG:4222 →
geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)
+proj=longlat +datum=WGS84 +no_defs +type=crsMore about EPSG:4326 →