Convert coordinates from Corrego Alegre 1970-72 (EPSG:4225) to SAD69 (EPSG:4618) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 1 transformation between Corrego Alegre 1970-72 (EPSG:4225) and SAD69 (EPSG:4618). Its parameters, accuracy and area of use are listed below.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -138.7 | metre |
| Y-axis translation(ty) | 164.4 | metre |
| Z-axis translation(tz) | 34.4 | metre |
Derived by Brazilian Institute of Geography and Statistics (IBGE) in 1983 at Chua origin point.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4225", "EPSG:4618", 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: Brazil - Corrego Alegre 1970-1972
+proj=longlat +ellps=intl +no_defs +type=crsMore about EPSG:4225 →
geographic system using latitude and longitude on an ellipsoid · Area of use: South America - SAD69 by country
+proj=longlat +ellps=aust_SA +no_defs +type=crsMore about EPSG:4618 →