Convert Korean 1985 to KGD2002

Convert coordinates from Korean 1985 (EPSG:4162) to KGD2002 (EPSG:4737) — 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-4737

Official EPSG transformation from Korean 1985 to KGD2002

The EPSG Geodetic Parameter Dataset defines 1 transformation between Korean 1985 (EPSG:4162) and KGD2002 (EPSG:4737). Its parameters, accuracy and area of use are listed below.

Korean 1985 to KGD2002 (1)

EPSG:5189±1 m

Method:: Molodensky-Badekas (CF geog2D domain)
Area of use:: South Korea - onshore
Scope:: Transformation of coordinates at 1m level of accuracy.

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

For accuracies commensurate with mapping at 1/5000 scale. May be taken as approximate transformation Korean 1985 to WGS 84 - see code 5191.

Convert EPSG:4162 to EPSG:4737 in code

The same transformation with common GIS tools and libraries:

from pyproj import Transformer

transformer = Transformer.from_crs("EPSG:4162", "EPSG:4737", 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:4737 — KGD2002

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

+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs

More about EPSG:4737 →

Frequently asked questions

How accurate is converting Korean 1985 to KGD2002?: 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:4737 to EPSG:4162 →