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Convert Azores Occidental 1939 to PTRA08

Convert coordinates from Azores Occidental 1939 (EPSG:4182) to PTRA08 (EPSG:5013) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-4182-to-epsg-5013

Official EPSG transformations from Azores Occidental 1939 to PTRA08

The EPSG Geodetic Parameter Dataset defines 3 transformations between Azores Occidental 1939 (EPSG:4182) and PTRA08 (EPSG:5013). Each applies to a specific area — pick the one whose area of use covers your data.

Azores Occidental 1939 to PTRA08 (2)

EPSG:5034±0.2 mBest accuracy
Method:
Geocentric translations (geog2D domain)
Area of use:
Portugal - Azores W - Flores onshore
Scope:
Transformation of coordinates at 0.2m level of accuracy.
ParameterValueUnit
X-axis translation(tx)-423.053metre
Y-axis translation(ty)-172.871metre
Z-axis translation(tz)83.771metre

Derived at 18 points in May 2009. Residuals at 15 test points within 0.1m horizontal and 0.2m vertical. Info source also provides a Position Vector tfm of similar accuracy.

Azores Occidental 1939 to PTRA08 (3)

EPSG:5035±0.3 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Portugal - Azores W - Corvo onshore
Scope:
Transformation of coordinates at 0.3m level of accuracy.
ParameterValueUnit
X-axis translation(tx)-423.024metre
Y-axis translation(ty)-172.923metre
Z-axis translation(tz)83.83metre

Derived at 3 points in May 2009. Residuals at these points within 0.1m horizontal and 0.3m vertical. Info source also provides a Position Vector tfm of similar accuracy.

Azores Occidental 1939 to PTRA08 (1)

EPSG:5033±0.5 m
Method:
Geocentric translations (geog2D domain)
Area of use:
Portugal - Azores W - onshore
Scope:
Transformation of coordinates at 0.5m level of accuracy.
ParameterValueUnit
X-axis translation(tx)-423.058metre
Y-axis translation(ty)-172.868metre
Z-axis translation(tz)83.772metre

Derived at 21 points in May 2009. Residuals at 18 test points within 0.1m horizontal and 0.2m vertical. Info source also provides a Position Vector tfm of similar accuracy. See codes 5034-35 for preferred tfms for islands of Flores and Corvo.

Convert EPSG:4182 to EPSG:5013 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4182", "EPSG:5013", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4182 — Azores Occidental 1939

geographic system using latitude and longitude on an ellipsoid · Area of use: Portugal - Azores W - onshore

+proj=longlat +ellps=intl +no_defs +type=crs
More about EPSG:4182 →

Target: EPSG:5013 — PTRA08

geographic system using latitude and longitude on an ellipsoid · Area of use: Portugal - Azores and Madeira

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs
More about EPSG:5013 →

Frequently asked questions

How accurate is converting Azores Occidental 1939 to PTRA08?
The most accurate official EPSG transformation between these systems is accurate to about ±0.2 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation 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:5013 to EPSG:4182 →