Convert Azores Oriental 1995 to WGS 84

Convert coordinates from Azores Oriental 1995 (EPSG:4664) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4664-to-epsg-4326

Official EPSG transformations from Azores Oriental 1995 to WGS 84

The EPSG Geodetic Parameter Dataset defines 4 transformations between Azores Oriental 1995 (EPSG:4664) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

Azores Oriental 1995 to WGS 84 (3)

EPSG:1969±1 mBest accuracy

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Portugal - Azores E - S Miguel onshore
Scope:: Medium accuracy applications.

Parameter	Value	Unit
X-axis translation(tx)	-211.939	metre
Y-axis translation(ty)	137.626	metre
Z-axis translation(tz)	58.3	metre
X-axis rotation(rx)	0.089	arc-second
Y-axis rotation(ry)	-0.251	arc-second
Z-axis rotation(rz)	-0.079	arc-second
Scale difference(ds)	0.384	parts per million

Calculated in 2001.

Azores Oriental 1995 to WGS 84 (5)

EPSG:1971±1 m

Method:: Coordinate Frame rotation (geog2D domain)
Area of use:: Portugal - Azores E - onshore
Scope:: Medium accuracy applications.

Parameter	Value	Unit
X-axis translation(tx)	-208.719	metre
Y-axis translation(ty)	129.685	metre
Z-axis translation(tz)	52.092	metre
X-axis rotation(rx)	0.195	arc-second
Y-axis rotation(ry)	0.014	arc-second
Z-axis rotation(rz)	-0.327	arc-second
Scale difference(ds)	0.198	parts per million

Mean for all islands in group.

Azores Oriental 1995 to WGS 84 (2)

EPSG:1968±5 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Portugal - Azores E - S Miguel onshore
Scope:: Low accuracy applications.

Parameter	Value	Unit
X-axis translation(tx)	-204.633	metre
Y-axis translation(ty)	140.216	metre
Z-axis translation(tz)	55.199	metre

Calculated in 2001.

Azores Oriental 1995 to WGS 84 (4)

EPSG:1970±5 m

Method:: Geocentric translations (geog2D domain)
Area of use:: Portugal - Azores E - onshore
Scope:: Low accuracy applications.

Parameter	Value	Unit
X-axis translation(tx)	-204.619	metre
Y-axis translation(ty)	140.176	metre
Z-axis translation(tz)	55.226	metre

Mean for all islands in group.

Convert EPSG:4664 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4664", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4664 — Azores Oriental 1995

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

+proj=longlat +ellps=intl +no_defs +type=crs

More about EPSG:4664 →

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 Azores Oriental 1995 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±1 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:4326 to EPSG:4664 →