Convert coordinates from TUREF (EPSG:5252) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.
TUREF (EPSG:5252) is the Turkish National Reference Frame, an ITRF96 realisation at epoch 2005.0 on the GRS 1980 ellipsoid. It is the basis of Turkey's modern mapping, including the TM zones used for large-scale work (EPSG:5253–5259) and the 3-degree Gauss–Krüger heritage.
TUREF and WGS 84 agree at the metre level — the published EPSG operation is effectively a null transformation with ±1 m accuracy. Real-world discrepancies in Turkish data almost always trace back to the older ED50-based systems, not TUREF.
Anatolia's active tectonics (the North and East Anatolian faults) mean precise work increasingly references epochs explicitly; for GIS purposes TUREF ≈ WGS 84 is a safe working assumption.
Try it: Ankara, Turkey
Input (EPSG:5252): 32.8597, 39.9334
The EPSG Geodetic Parameter Dataset defines 1 transformation between TUREF (EPSG:5252) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | 0 | metre |
| Y-axis translation(ty) | 0 | metre |
| Z-axis translation(tz) | 0 | metre |
Approximation at the +/- 1m level assuming that TUREF is equivalent to WGS 84.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:5252", "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: Turkey
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crsMore about EPSG:5252 →
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 →