Convert coordinates from IGN63 Hiva Oa (EPSG:4689) to RGPF (EPSG:4687) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
The EPSG Geodetic Parameter Dataset defines 2 transformations between IGN63 Hiva Oa (EPSG:4689) and RGPF (EPSG:4687). Each applies to a specific area — pick the one whose area of use covers your data.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 410.721 | metre |
| Y-axis translation(ty) | 55.049 | metre |
| Z-axis translation(tz) | 80.746 | metre |
| X-axis rotation(rx) | -2.5779 | arc-second |
| Y-axis rotation(ry) | -2.3514 | arc-second |
| Z-axis rotation(rz) | -0.6664 | arc-second |
| Scale difference(ds) | 17.3311 | parts per million |
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 374.715 | metre |
| Y-axis translation(ty) | -58.407 | metre |
| Z-axis translation(tz) | -0.957 | metre |
| X-axis rotation(rx) | -16.2111 | arc-second |
| Y-axis rotation(ry) | -11.4626 | arc-second |
| Z-axis rotation(rz) | -5.5357 | arc-second |
| Scale difference(ds) | -0.5409 | parts per million |
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4689", "EPSG:4687", 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: French Polynesia - Marquesas Islands - Hiva Oa and Tahuata
+proj=longlat +ellps=intl +no_defs +type=crsMore about EPSG:4689 →
geographic system using latitude and longitude on an ellipsoid · Area of use: French Polynesia
+proj=longlat +ellps=GRS80 +no_defs +type=crsMore about EPSG:4687 →