Convert coordinates from Porto Santo 1995 (EPSG:4663) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 2 transformations between Porto Santo 1995 (EPSG:4663) and WGS 84 (EPSG:4326). Each applies to a specific area — pick the one whose area of use covers your data.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -210.502 | metre |
| Y-axis translation(ty) | -66.902 | metre |
| Z-axis translation(tz) | -48.476 | metre |
| X-axis rotation(rx) | -2.094 | arc-second |
| Y-axis rotation(ry) | 15.067 | arc-second |
| Z-axis rotation(rz) | 5.817 | arc-second |
| Scale difference(ds) | 0.485 | parts per million |
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -502.862 | metre |
| Y-axis translation(ty) | -247.438 | metre |
| Z-axis translation(tz) | 312.724 | metre |
Derived at Forte de Sao Tiago.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4663", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)geographic system using latitude and longitude on an ellipsoid · Area of use: Portugal - Madeira archipelago onshore
+proj=longlat +ellps=intl +no_defs +type=crsMore about EPSG:4663 →
geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)
+proj=longlat +datum=WGS84 +no_defs +type=crsMore about EPSG:4326 →