Earth Sandwich / City antipodes / Guankou
Antipode finder · China
The antipode of
Guankou.
Draw a straight line from Guankou (28.16° N, 113.63° E) through the centre of the Earth and it comes out at 28.16° S, 66.37° W, on dry land in Argentina, 15 km from Saujil. An exact Earth sandwich is possible.
- Guankou
- 28.16° N, 113.63° E · about 200 m above sea level · 1,380,000 people
- Antipode
- 28.16° S, 66.37° W
- What is there
- Dry land in Argentina
- Nearest town
- Saujil, Argentina · 15 km from the antipode
- Nearest big city
- Córdoba · 418 km from the antipode
- Sandwich verdict
- EXACT land lies opposite land
- Elevation bonus
- +960 m (200 m here, 760 m there)
Can you make an Earth sandwich from Guankou?
Yes: an exact Earth sandwich. Guankou 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 Guankou and have a friend put one down 15 km from Saujil, Argentina at the same UTC minute, and the whole planet is the filling. The elevation bonus would be about 960 m: Guankou sits about 200 m above sea level and the other slice about 760 m above sea level.
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.