Convert Azores Central 1995 to WGS 84

Convert coordinates from Azores Central 1995 (EPSG:4665) 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-4665-to-epsg-4326

Official EPSG transformations from Azores Central 1995 to WGS 84

The EPSG Geodetic Parameter Dataset defines 10 transformations between Azores Central 1995 (EPSG:4665) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.

Azores Central 1995 to WGS 84 (3)

EPSG:1973±1 mBest accuracy

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

Parameter	Value	Unit
X-axis translation(tx)	-105.854	metre
Y-axis translation(ty)	165.589	metre
Z-axis translation(tz)	-38.312	metre
X-axis rotation(rx)	0.003	arc-second
Y-axis rotation(ry)	0.026	arc-second
Z-axis rotation(rz)	-0.024	arc-second
Scale difference(ds)	-0.048	parts per million

Azores Central 1995 to WGS 84 (5)

EPSG:1975±1 m

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

Parameter	Value	Unit
X-axis translation(tx)	-104	metre
Y-axis translation(ty)	162.924	metre
Z-axis translation(tz)	-38.882	metre
X-axis rotation(rx)	0.075	arc-second
Y-axis rotation(ry)	0.071	arc-second
Z-axis rotation(rz)	-0.051	arc-second
Scale difference(ds)	-0.338	parts per million

Azores Central 1995 to WGS 84 (7)

EPSG:1977±1 m

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

Parameter	Value	Unit
X-axis translation(tx)	-95.323	metre
Y-axis translation(ty)	166.098	metre
Z-axis translation(tz)	-69.942	metre
X-axis rotation(rx)	0.215	arc-second
Y-axis rotation(ry)	1.031	arc-second
Z-axis rotation(rz)	-0.047	arc-second
Scale difference(ds)	1.922	parts per million

Azores Central 1995 to WGS 84 (9)

EPSG:1979±1 m

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

Parameter	Value	Unit
X-axis translation(tx)	-100.306	metre
Y-axis translation(ty)	161.246	metre
Z-axis translation(tz)	-48.761	metre
X-axis rotation(rx)	0.192	arc-second
Y-axis rotation(ry)	0.385	arc-second
Z-axis rotation(rz)	-0.076	arc-second
Scale difference(ds)	0.131	parts per million

Azores Central 1995 to WGS 84 (11)

EPSG:1981±1 m

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

Parameter	Value	Unit
X-axis translation(tx)	-103.088	metre
Y-axis translation(ty)	162.481	metre
Z-axis translation(tz)	-28.276	metre
X-axis rotation(rx)	-0.167	arc-second
Y-axis rotation(ry)	-0.082	arc-second
Z-axis rotation(rz)	-0.168	arc-second
Scale difference(ds)	-1.504	parts per million

Mean for all islands in group.

Azores Central 1995 to WGS 84 (2)

EPSG:1972±5 m

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

Parameter	Value	Unit
X-axis translation(tx)	-106.301	metre
Y-axis translation(ty)	166.27	metre
Z-axis translation(tz)	-37.916	metre

Azores Central 1995 to WGS 84 (4)

EPSG:1974±5 m

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

Parameter	Value	Unit
X-axis translation(tx)	-106.248	metre
Y-axis translation(ty)	166.244	metre
Z-axis translation(tz)	-37.845	metre

Azores Central 1995 to WGS 84 (6)

EPSG:1976±5 m

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

Parameter	Value	Unit
X-axis translation(tx)	-106.044	metre
Y-axis translation(ty)	166.655	metre
Z-axis translation(tz)	-37.876	metre

Azores Central 1995 to WGS 84 (8)

EPSG:1978±5 m

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

Parameter	Value	Unit
X-axis translation(tx)	-106.253	metre
Y-axis translation(ty)	166.239	metre
Z-axis translation(tz)	-37.854	metre

Azores Central 1995 to WGS 84 (10)

EPSG:1980±5 m

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

Parameter	Value	Unit
X-axis translation(tx)	-106.226	metre
Y-axis translation(ty)	166.366	metre
Z-axis translation(tz)	-37.893	metre

Mean for all islands in group.

Convert EPSG:4665 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4665", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4665 — Azores Central 1995

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

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

More about EPSG:4665 →

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 Central 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:4665 →