Convert coordinates from Tristan 1968 (EPSG:4734) 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 1 transformation between Tristan 1968 (EPSG:4734) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -632 | metre |
| Y-axis translation(ty) | 438 | metre |
| Z-axis translation(tz) | -609 | metre |
Determined at 1 satellite station. Accuracy +/- 25m in each axis.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4734", "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: St Helena - Tristan da Cunha
+proj=longlat +ellps=intl +towgs84=-632,438,-609,0,0,0,0 +no_defs +type=crsMore about EPSG:4734 →
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 →