Earth Sandwich / City antipodes / Changsha
Antipode finder · China
The antipode of
Changsha.
Draw a straight line from Changsha (28.20° N, 112.97° E) through the centre of the Earth and it comes out at 28.20° S, 67.03° W, on dry land in Argentina, 24 km from San Blas. An exact Earth sandwich is possible.
- Changsha
- 28.20° N, 112.97° E · about 40 m above sea level · 3,093,980 people
- Antipode
- 28.20° S, 67.03° W
- What is there
- Dry land in Argentina
- Nearest town
- San Blas, Argentina · 24 km from the antipode
- Nearest big city
- Córdoba · 450 km from the antipode
- Sandwich verdict
- EXACT land lies opposite land
- Elevation bonus
- +1,120 m (40 m here, 1,080 m there)
Can you make an Earth sandwich from Changsha?
Yes: an exact Earth sandwich. Changsha is one of the few large cities with dry land directly opposite it. The grid that verifies submissions rates the spot exact: put a slice down in Changsha and have a friend put one down 24 km from San Blas, Argentina at the same UTC minute, and the whole planet is the filling. The elevation bonus would be about 1,120 m: Changsha sits about 40 m above sea level and the other slice about 1,080 m above sea level.
Changsha is on the China & Mongolia ↔ Argentina & Chile 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.