Source: EPSG:4618 — SAD69
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 →
Convert EPSG:4618 to EPSG:4225
Online coordinate converter from SAD69 (EPSG:4618) to Corrego Alegre 1970-72 (EPSG:4225). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
The EPSG dataset defines official transformation parameters for the reverse direction. See Corrego Alegre 1970-72 to SAD69 — the parameters are invertible.
Convert EPSG:4618 to EPSG:4225 in code
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4618", "EPSG:4225", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)Target: EPSG:4225 — Corrego Alegre 1970-72
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 →
Frequently asked questions
- How accurate is converting SAD69 to Corrego Alegre 1970-72?
- Projection-only conversions are accurate to floating-point precision. If a datum shift is involved, browser-based tools use Helmert parameters which are accurate to roughly 1-5 m; for surveying-grade work apply the official grid-shift transformation in a desktop GIS.
- Does my data leave the browser when I use this converter?
- No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.