mapverter

EPSG:5181 Coordinate Converter

Convert EPSG:5181 KGD2002 Central Belt coordinates, with a 500,000 m false northing, to WGS 84, and tell them apart from EPSG:5186 and EPSG:5174.

KGD2002 / Central Belt

Area of use (longitude / latitude): west 126°, south 33.96°, east 128°, north 38.33°.

PROJ definition

+proj=tmerc +lat_0=38 +lon_0=127 +k=1 +x_0=200000 +y_0=500000 +ellps=GRS80 +units=m +no_defs
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Central Belt with a 500,000 m false northing

EPSG:5181 is KGD2002 / Central Belt, a Transverse Mercator projection in metres on the GRS80 ellipsoid. Its central meridian is 127° E, the latitude of origin is 38° N, the scale factor is 1, the false easting is 200,000 m and the false northing is 500,000 m. The bundled definition covers 126° to 128° E and 33.96° to 38.33° N. The point at 127° E, 37.5° N is about x = 200,000 m and y = 444,504 m.

Two common mix-ups

  • EPSG:5186 has a false northing of 600,000 m, so y values for the same place are 100,000 m larger. Reading one as the other shifts the data about 100 km north or south.
  • EPSG:5174 and EPSG:2097 have the same false easting and northing, but they are based on the Korean 1985 datum and the Bessel 1841 ellipsoid. Their numbers look almost the same, yet reading EPSG:5181 coordinates as either of them moves the data by roughly 300 to 360 m, according to mapverter's bundled definitions.

How mapverter handles EPSG:5181

  • A .prj is matched by its EPSG code or by its projection parameters.
  • Without a .prj, EPSG:5181 is among the candidates whenever the data fits the central belt. Because 5181, 5174 and 2097 look so similar, compare them on the map before you confirm.
  • This page presets EPSG:5181 as the target for SHP and CSV output. KML, KMZ, GeoJSON and GPX always use WGS 84.

Frequently asked questions

How do I know whether my data is EPSG:5181 or EPSG:5186?
Compare the y values. For the same place, EPSG:5186 values are 100,000 m larger. If the data lands about 100 km too far north or south, the other one is probably right.
Why does my data shift by a few hundred metres?
EPSG:5181 is easy to confuse with EPSG:5174 or EPSG:2097, which share its false easting and northing but use a different datum. Assigning the wrong one moves the data roughly 300 to 360 m.
Can I convert EPSG:5181 to EPSG:5186?
Yes. Open the EPSG:5186 page, which presets that target, then add the file with its .prj and download SHP or CSV.