Earth Sandwich / City antipodes / Changwon
Antipode finder · South Korea
The antipode of
Changwon.
Draw a straight line from Changwon (35.23° N, 128.68° E) through the centre of the Earth and it comes out at 35.23° S, 51.32° W, in the South Atlantic Ocean, 240 km from the nearest dry land, off the coast of Uruguay. The other slice of an Earth sandwich would sink.
- Changwon
- 35.23° N, 128.68° E · about 40 m above sea level · 1,025,702 people
- Antipode
- 35.23° S, 51.32° W
- What is there
- The South Atlantic Ocean; the sea floor there lies about 2,680 m below the surface
- Nearest dry land
- 240 km from the antipode, on the coast of Uruguay
- Nearest town
- Puimayen, Uruguay · 251 km from the antipode
- Nearest big city
- Montevideo · 445 km from the antipode
- Sandwich verdict
- SOGGY the other slice lands in open water
- Nearest exact spot
- 244 km away, 40 km from Haenam, South Korea ⇄ near Castillos, Uruguay
Can you make an Earth sandwich from Changwon?
No, not from Changwon itself. The other slice would land in the South Atlantic Ocean, 240 km from the nearest dry land (Uruguay), where the sea floor lies about 2,680 m below the surface. Boats do not count (Sandwich Law § 1.3).
The nearest place from which an exact Earth sandwich is possible is 244 km from Changwon, 40 km from Haenam, South Korea. Its other slice would go down 25 km from Castillos, Uruguay.
Changwon is on the Okinawa & Jeju ↔ southern Brazil corridor. Its guide lists where every city on both sides lands and how to make an Earth sandwich there.
How this was worked out: the antipode flips the latitude and moves the longitude by 180°. Land or sea comes from the OpenStreetMap coastline the map uses; the sandwich verdict and elevations come from the verifier's 0.2° grid (Natural Earth land, ETOPO 2022 relief); water names from Natural Earth; towns and populations from GeoNames. The city's position is GeoNames' point for it; a big city's suburbs spread tens of kilometres around that point, and the figures move with them. Generated 2026-09-29.