Hongseong (Chungcheongnam) is geographically located at latitude 36° 36' 0" North of the Equator and longitude 126° 39' 35" East of the Prime Meridian on the Map of World. The following locations related to it are represented by the an airplane flight paths route between two points and may not be nearest by road.
Osan, South Korea: Osan Ab [OSN]
Gunsan, South Korea: Gunsan Ab [KUV]
Gusan, South Korea: Gunsan [KUZ]