Convert coordinates from ELD79 (EPSG:4159) 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 9 transformations between ELD79 (EPSG:4159) 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) | -113.997 | metre |
| Y-axis translation(ty) | -97.076 | metre |
| Z-axis translation(tz) | -152.312 | metre |
Derived December 2001 by NAGECO. 3-dimensional SD at 11 points is 0.5m. Connected to ITRF via Remsa 2000 data. Used by TotalFinaElf.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -194.513 | metre |
| Y-axis translation(ty) | -63.978 | metre |
| Z-axis translation(tz) | -25.759 | metre |
| X-axis rotation(rx) | -3.4027 | arc-second |
| Y-axis rotation(ry) | 3.756 | arc-second |
| Z-axis rotation(rz) | -3.352 | arc-second |
| Scale difference(ds) | -0.9175 | parts per million |
Derived by Geoid in 2000 from ITRF connection by NAGECO for TotalFinaElf. For historic compatibility TFE use the 1994 tfm ELD79 to WGS 84 (3) (code 1861) rather than this transformation.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -114.7 | metre |
| Y-axis translation(ty) | -98.5 | metre |
| Z-axis translation(tz) | -150.7 | metre |
Derived by Total at stations SDL 130-03, 04 and 05 in May 2005.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -114.5 | metre |
| Y-axis translation(ty) | -96.1 | metre |
| Z-axis translation(tz) | -151.9 | metre |
Derived by GEOID in 1994 from Transit satellite data. Used by TotalFinaElf.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -117.7 | metre |
| Y-axis translation(ty) | -100.3 | metre |
| Z-axis translation(tz) | -152.4 | metre |
Derived by SDL for Total in Cyrenaica blocks 2 & 4.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -115.8543 | metre |
| Y-axis translation(ty) | -99.0583 | metre |
| Z-axis translation(tz) | -152.4616 | metre |
Derived at 29 stations throughout Libya in May 2006.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -389.691 | metre |
| Y-axis translation(ty) | 64.502 | metre |
| Z-axis translation(tz) | 210.209 | metre |
| X-axis rotation(rx) | -0.086 | arc-second |
| Y-axis rotation(ry) | -14.314 | arc-second |
| Z-axis rotation(rz) | 6.39 | arc-second |
| Scale difference(ds) | 0.9264 | parts per million |
Derived for the Great Man-made River Authority (GMRA).
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -118.996 | metre |
| Y-axis translation(ty) | -111.177 | metre |
| Z-axis translation(tz) | -198.687 | metre |
Used by Petrocanada and previous licence holders in Amal field, concession 12.
| Parameter | Value | Unit |
|---|---|---|
| X-axis translation(tx) | -69.06 | metre |
| Y-axis translation(ty) | -90.71 | metre |
| Z-axis translation(tz) | -142.56 | metre |
Used by Repsol in Murzuq field, and PetroCanada and previous licence holders in NC177 and 72 (En Naga field). Reliability of connection to ELD79 questionned.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:4159", "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: Libya
+proj=longlat +ellps=intl +no_defs +type=crsMore about EPSG:4159 →
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 →