Convert ONGD14 to WGS 84

Convert coordinates from ONGD14 (EPSG:7371) to WGS 84 (EPSG:4978) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (x, y)

Output (x, y)

Direct link to this transformation: epsgtransform.com/transform/epsg-7371-to-epsg-4978

Official EPSG transformation from ONGD14 to WGS 84

The EPSG Geodetic Parameter Dataset defines 1 transformation between ONGD14 (EPSG:7371) and WGS 84 (EPSG:4978). Its parameters, accuracy and area of use are listed below.

ONGD14 to WGS 84 (1)

EPSG:7377±0.1 m

Method:: Coordinate Frame rotation (geocentric domain)
Area of use:: Oman
Scope:: Geodesy.

Parameter	Value	Unit
X-axis translation(tx)	0.819	metre
Y-axis translation(ty)	-0.5762	metre
Z-axis translation(tz)	-1.6446	metre
X-axis rotation(rx)	0.00378	arc-second
Y-axis rotation(ry)	0.03317	arc-second
Z-axis rotation(rz)	-0.00318	arc-second
Scale difference(ds)	0.0693	parts per million

Translations given by information source in mm. Derived at 20 stations, RMS 0.0313m in northing, 0.0377m in easting and 0.0678m in height.

Convert EPSG:7371 to EPSG:4978 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:7371", "EPSG:4978", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:7371 — ONGD14

geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: Oman

+proj=geocent +ellps=GRS80 +towgs84=0.819,-0.5762,-1.6446,-0.00378,-0.03317,0.00318,0.0693 +units=m +no_defs +type=crs

More about EPSG:7371 →

Target: EPSG:4978 — WGS 84

geocentric Cartesian system (Earth-centred Earth-fixed) · Area of use: World

+proj=geocent +datum=WGS84 +units=m +no_defs +type=crs

More about EPSG:4978 →

Frequently asked questions

How accurate is converting ONGD14 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±0.1 m within its stated area of use. Browser-based converters approximate datum shifts with Helmert parameters; for surveying-grade work apply the official transformation in a desktop GIS.
Does my data leave the browser when I use this converter?: No. All coordinate transformations are computed locally in your browser using proj4js. The coordinates you enter are never transmitted to any server.

Need the reverse? Convert EPSG:4978 to EPSG:7371 →