Convert coordinates from HD72 (EPSG:4237) 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 4 transformations between HD72 (EPSG:4237) 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) | 52.17 | metre |
| Y-axis translation(ty) | -71.82 | metre |
| Z-axis translation(tz) | -14.9 | metre |
Parameter value error in info source Hungarian text but correct in English summary. Replaces HD72 to WGS 84 (2) (code 1831).
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 52.684 | metre |
| Y-axis translation(ty) | -71.194 | metre |
| Z-axis translation(tz) | -13.975 | metre |
| X-axis rotation(rx) | 0.312 | arc-second |
| Y-axis rotation(ry) | 0.1063 | arc-second |
| Z-axis rotation(rz) | 0.3729 | arc-second |
| Scale difference(ds) | 1.0191 | parts per million |
Parameter values taken from HD72 to ETRS89 (2) (code 1449) assuming that ETRS89 is equivalent to WGS 84 within the accuracy of the transformation. Replaces HD72 to WGS 84 (1) (code 1830).
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 56 | metre |
| Y-axis translation(ty) | -75.77 | metre |
| Z-axis translation(tz) | -15.31 | metre |
| X-axis rotation(rx) | 0.37 | arc-second |
| Y-axis rotation(ry) | 0.2 | arc-second |
| Z-axis rotation(rz) | 0.21 | arc-second |
| Scale difference(ds) | 1.01 | parts per million |
Parameter values taken from HD72 to ETRS89 (1) (code 1829) assuming that ETRS89 is equivalent to WGS 84 within the accuracy of the transformation. OGP recommends use of newer MSZ 7222 equivalent (tfm code 1448) in preference to this transformation.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 57.01 | metre |
| Y-axis translation(ty) | -69.97 | metre |
| Z-axis translation(tz) | -9.29 | metre |
Derived at fundamental point Szolohegy and tested at 99 stations throughout Hungary. Accuracy better than 1m in all three dimensions throughout Hungary. OGP recommends use of newer transformation (tfm code 1242) in preference to this transformation.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4237", "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: Hungary
+proj=longlat +ellps=GRS67 +no_defs +type=crsMore about EPSG:4237 →
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 →