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Convert WGS 84 (G730) to WGS 84 (G873)

Convert coordinates from WGS 84 (G730) (EPSG:7656) to WGS 84 (G873) (EPSG:7658) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

Direct link to this transformation: epsgtransform.com/transform/epsg-7656-to-epsg-7658

Official EPSG transformation from WGS 84 (G730) to WGS 84 (G873)

The EPSG Geodetic Parameter Dataset defines 1 transformation between WGS 84 (G730) (EPSG:7656) and WGS 84 (G873) (EPSG:7658). Its parameters, accuracy and area of use are listed below.

WGS 84 (G730) to WGS 84 (G873) (1)

EPSG:9961±0.04 m
Method:
Coordinate Frame rotation (geocentric domain)
Area of use:
World
Scope:
Spatial referencing.
ParameterValueUnit
X-axis translation(tx)-20millimetre
Y-axis translation(ty)-16millimetre
Z-axis translation(tz)14millimetre
X-axis rotation(rx)0milliarc-second
Y-axis rotation(ry)0milliarc-second
Z-axis rotation(rz)0milliarc-second
Scale difference(ds)-0.69parts per billion

Scale difference in ppb where 1/billion = 1E-9 or nm/m. Derived via ITRF91 through ITRF94 at epoch 1995.5. Parameter values valid at other epochs including 2005.0.

Convert EPSG:7656 to EPSG:7658 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:7656", "EPSG:7658", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:7656 — WGS 84 (G730)

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

+proj=geocent +ellps=WGS84 +units=m +no_defs +type=crs
More about EPSG:7656 →

Target: EPSG:7658 — WGS 84 (G873)

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

+proj=geocent +ellps=WGS84 +units=m +no_defs +type=crs
More about EPSG:7658 →

Frequently asked questions

How accurate is converting WGS 84 (G730) to WGS 84 (G873)?
The most accurate official EPSG transformation between these systems is accurate to about ±0.04 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:7658 to EPSG:7656 →