Earth Sandwich / City antipodes / Changshu
Antipode finder · China
The antipode of
Changshu.
Draw a straight line from Changshu (31.65° N, 120.74° E) through the centre of the Earth and it comes out at 31.65° S, 59.26° W, on dry land in Argentina, 33 km from Villaguay. An exact Earth sandwich is possible.
- Changshu
- 31.65° N, 120.74° E · about 40 m above sea level · 1,677,050 people
- Antipode
- 31.65° S, 59.26° W
- What is there
- Dry land in Argentina
- Nearest town
- Villaguay, Argentina · 33 km from the antipode
- Nearest big city
- Buenos Aires · 340 km from the antipode
- Sandwich verdict
- EXACT land lies opposite land
- Elevation bonus
- +80 m (40 m here, 40 m there)
Can you make an Earth sandwich from Changshu?
Yes: an exact Earth sandwich. Changshu 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 Changshu and have a friend put one down 33 km from Villaguay, Argentina at the same UTC minute, and the whole planet is the filling. The elevation bonus would be about 80 m: Changshu sits about 40 m above sea level and the other slice about 40 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.