Earth Sandwich / City antipodes / Haikou
Antipode finder · China
The antipode of
Haikou.
Draw a straight line from Haikou (20.03° N, 110.35° E) through the centre of the Earth and it comes out at 20.03° S, 69.65° W, on dry land in Chile, 13 km from Huara. An exact Earth sandwich is possible.
- Haikou
- 20.03° N, 110.35° E · at about sea level · 2,873,358 people
- Antipode
- 20.03° S, 69.65° W
- What is there
- Dry land in Chile
- Nearest town
- Huara, Chile · 13 km from the antipode
- Nearest big city
- La Paz · 424 km from the antipode
- Sandwich verdict
- EXACT land lies opposite land
- Elevation bonus
- +1,040 m (-40 m here, 1,080 m there)
Can you make an Earth sandwich from Haikou?
Yes: an exact Earth sandwich. Haikou 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 Haikou and have a friend put one down 13 km from Huara, Chile at the same UTC minute, and the whole planet is the filling. The elevation bonus would be about 1,040 m: Haikou sits at about sea level and the other slice about 1,080 m above sea level.
Haikou 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.