Convert Korean 1985 to WGS 84

Convert coordinates from Korean 1985 (EPSG:4162) to WGS 84 (EPSG:4326) — official EPSG transformation parameters, accuracy and area of use, with a free in-browser converter.

From

Input (lon, lat (decimal degrees))

Output (lon, lat (decimal degrees))

Direct link to this transformation: epsgtransform.com/transform/epsg-4162-to-epsg-4326

Official EPSG transformation from Korean 1985 to WGS 84

The EPSG Geodetic Parameter Dataset defines 1 transformation between Korean 1985 (EPSG:4162) and WGS 84 (EPSG:4326). Its parameters, accuracy and area of use are listed below.

Korean 1985 to WGS 84 (1)

EPSG:5191±1 m

Method:: Molodensky-Badekas (CF geog2D domain)
Area of use:: South Korea - onshore
Scope:: (null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences.

Parameter	Value	Unit
X-axis translation(tx)	-145.907	metre
Y-axis translation(ty)	505.034	metre
Z-axis translation(tz)	685.756	metre
X-axis rotation(rx)	-1.162	arc-second
Y-axis rotation(ry)	2.347	arc-second
Z-axis rotation(rz)	1.592	arc-second
Scale difference(ds)	6.342	parts per million
Pivot X(px)	-3159521.31	metre
Pivot Y(py)	4068151.32	metre
Pivot Z(pz)	3748113.85	metre

Parameter values from Korean 1985 to KGD2002 (1) (code 5189). Assumes KGD2002 and WGS 84 can be considered the same to within the accuracy of the transformation.

Convert EPSG:4162 to EPSG:4326 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4162", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)

Source: EPSG:4162 — Korean 1985

geographic system using latitude and longitude on an ellipsoid · Area of use: South Korea - onshore

+proj=longlat +ellps=bessel +no_defs +type=crs

More about EPSG:4162 →

Target: EPSG:4326 — WGS 84

geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)

+proj=longlat +datum=WGS84 +no_defs +type=crs

More about EPSG:4326 →

Frequently asked questions

How accurate is converting Korean 1985 to WGS 84?: The most accurate official EPSG transformation between these systems is accurate to about ±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:4326 to EPSG:4162 →