EPSG systems

EPSG:5174 Korean 1985 / Modified Central Belt

Projected system (Transverse Mercator) in use: Korea, Republic of (South Korea) - 126°E to 128°E mainland. The full definition below, and conversion in one click.

EPSG publishes no simple transformation to WGS 84 for this datum: conversion works on the ellipsoid alone and can be off by tens of metres.

System record
CodeEPSG:5174
NameKorean 1985 / Modified Central Belt
TypeProjected system — Transverse Mercator
Area of use Korea, Republic of (South Korea) - 126°E to 128°E mainland
Republic of Korea (South Korea) - between 126°E and 128°E - mainland and nearshore.
Bounds W 126,00° · S 33,96° · E 128,00° · N 38,33°
Countries South Korea
DatumKorean Datum 1985
Ellipsoid Bessel 1841 a = 6377397.155 m · 1/f = 299.1528128
Base geographic system EPSG:4162 — Korean 1985
Unit metre (X north, Y east)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeCadastre, engineering survey, topographic mapping (large and medium scale).

Projection parameters

ParameterValueUnit
Latitude of natural origin38degree
Longitude of natural origin127.00289027777778degree
Scale factor at natural origin1unity
False easting200000metre
False northing500000metre

proj4 definition

+proj=tmerc +lat_0=38 +lon_0=127.002890277778 +k=1 +x_0=200000 +y_0=500000 +ellps=bessel +units=m +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:5174.

WKT (ESRI format, the .prj content)

PROJCS["Korean_1985_Modified_Korea_Central_Belt",GEOGCS["GCS_Korean_Datum_1985",DATUM["D_Korean_Datum_1985",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",200000.0],PARAMETER["False_Northing",500000.0],PARAMETER["Central_Meridian",127.002890277778],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",38.0],UNIT["Meter",1.0]]

All systems — South Korea

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.