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Convert Corrego Alegre 1970-72 to WGS 84

Convert coordinates from Corrego Alegre 1970-72 (EPSG:4225) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4225-to-epsg-4326

Official EPSG transformations from Corrego Alegre 1970-72 to WGS 84

The EPSG Geodetic Parameter Dataset defines 4 transformations between Corrego Alegre 1970-72 (EPSG:4225) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

Corrego Alegre 1970-72 to WGS 84 (2)

EPSG:5541±2 mBest accuracy
Method:
NTv2
Area of use:
Brazil - Corrego Alegre 1970-1972
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Grid file: CA7072_003.gsb

Parameters from Corrego Alegre 1970-72 to SIRGAS 2000 (1) (tfm code 5526) assuming that SIRGAS 2000 and WGS 84 are equal within the accuracy of the transformation.

Corrego Alegre 1970-72 to WGS 84 (3)

EPSG:6192±5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Brazil - Corrego Alegre 1970-1972
Scope:
Topographic mapping (medium and small scale).
ParameterValueUnit
X-axis translation(tx)-205.57metre
Y-axis translation(ty)168.77metre
Z-axis translation(tz)-4.12metre

Formed by concatenation of tfms codes 6191 and 1877. Used by Petrobras and ANP until February 2005 when replaced by Corrego Alegre 1970-72 to WGS 84 (4) (tfm code 6194).

Corrego Alegre 1970-72 to WGS 84 (4)

EPSG:6194±5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Brazil - Corrego Alegre 1970-1972
Scope:
(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.
ParameterValueUnit
X-axis translation(tx)-206.05metre
Y-axis translation(ty)168.28metre
Z-axis translation(tz)-3.82metre

Parameter values from Corrego Alegre to SIRGAS 2000 (2) (tfm code 6193) assuming that SIRGAS 2000 and WGS 84 are equal within the accuracy of the transformation. Used by ANP and Petrobras from February 2005, replacing use of tfm code 6192.

Corrego Alegre 1970-72 to WGS 84 (1)

EPSG:1132±8 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Brazil - Corrego Alegre 1970-1972
Scope:
Military survey.
ParameterValueUnit
X-axis translation(tx)-206metre
Y-axis translation(ty)172metre
Z-axis translation(tz)-6metre

Derived at 17 stations. Accuracy 5m, 3m and 5m in X, Y and Z axes.

Convert EPSG:4225 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4225", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: 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=crs
More about EPSG:4225 →

Target: EPSG:4326 — WGS 84

geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)

+proj=longlat +datum=WGS84 +no_defs +type=crs
More about EPSG:4326 →

Frequently asked questions

How accurate is converting Corrego Alegre 1970-72 to WGS 84?
The most accurate official EPSG transformation between these systems is accurate to about ±2 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation (including the grid-shift files listed below) 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.
Need the reverse? Convert EPSG:4326 to EPSG:4225 →