Geodion tools
ECEF to geodetic coordinate converter
Convert Earth-centred, Earth-fixed Cartesian coordinates X, Y and Z to geodetic latitude, longitude and ellipsoidal height on a selected reference ellipsoid.
Single-point calculationCSV/XLSX batch processingLocal browser processing
Input coordinates
Enter geocentric Cartesian coordinates in metres and select the ellipsoid associated with the coordinates.
Coordinates remain on this device
Calculated position
Latitude, hemisphere
Longitude, hemisphere
Latitude, DMS
Longitude, DMS
Longitude is normalised to the interval −180° to +180°. At an exact pole, longitude is reported as 0° by convention.
Important interpretation note
This calculation changes coordinate representation only. It does not transform between datums or reference frames.
The supplied X, Y and Z coordinates must be geocentric and compatible with the selected ellipsoid. Epoch effects, tectonic motion and datum transformations are outside this calculation.
Batch processing
Process a CSV or XLSX file locally
Use the first worksheet and columns named x, y and z, in metres. Common aliases such as X_m, Y_m and Z_m are accepted. Optional id and comments columns are preserved.
Preview
| ID | Latitude (°) | Longitude (°) | Height (m) |
|---|
The preview shows up to 12 rows. CSV input produces UTF-8 CSV output; XLSX input produces a formatted Excel workbook.
Input convention
ECEF is a right-handed geocentric Cartesian system: X through latitude 0°, longitude 0°; Y through latitude 0°, longitude 90°E; Z through the north pole.
Output convention
Latitude is geodetic latitude. Height is ellipsoidal height above the selected reference ellipsoid, not orthometric height above a geoid or vertical datum.
Numerical handling
The calculation uses double-precision arithmetic, handles polar coordinates separately and rejects the undefined ellipsoid-centre case.
Need more than a conversion?