Earth Sandwich / City antipodes / Hefei
Antipode finder · China
The antipode of
Hefei.
Draw a straight line from Hefei (31.86° N, 117.28° E) through the centre of the Earth and it comes out at 31.86° S, 62.72° W, on dry land in Argentina, under 1 km from Las Varillas. An exact Earth sandwich is possible.
- Hefei
- 31.86° N, 117.28° E · about 40 m above sea level · 5,050,000 people
- Antipode
- 31.86° S, 62.72° W
- What is there
- Dry land in Argentina
- Nearest town
- Las Varillas, Argentina · under 1 km from the antipode
- Nearest big city
- Córdoba · 148 km from the antipode
- Sandwich verdict
- EXACT land lies opposite land
- Elevation bonus
- +160 m (40 m here, 120 m there)
Can you make an Earth sandwich from Hefei?
Yes: an exact Earth sandwich. Hefei 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 Hefei and have a friend put one down under 1 km from Las Varillas, Argentina at the same UTC minute, and the whole planet is the filling. The elevation bonus would be about 160 m: Hefei sits about 40 m above sea level and the other slice about 120 m above sea level.
Hefei 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.