Convert coordinates from Perroud 1950 (EPSG:4637) to RGTAAF07 (EPSG:7073) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 1 transformation between Perroud 1950 (EPSG:4637) and RGTAAF07 (EPSG:7073). Its parameters, accuracy and area of use are listed below.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 324.912 | metre |
| Y-axis translation(ty) | 153.282 | metre |
| Z-axis translation(tz) | 172.026 | metre |
Derived at three point on Petrels island at which residuals about 20 cm.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4637", "EPSG:7073", 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: Antarctica - Adelie Land coastal area
+proj=longlat +ellps=intl +towgs84=325,154,172,0,0,0,0 +no_defs +type=crsMore about EPSG:4637 →
geographic system using latitude and longitude on an ellipsoid · Area of use: French Southern and Antarctic Territories
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crsMore about EPSG:7073 →