Earth Sandwich / City antipodes / Songjiang
Antipode finder · China
The antipode of
Songjiang.
Draw a straight line from Songjiang (31.03° N, 121.22° E) through the centre of the Earth and it comes out at 31.03° S, 58.78° W, on dry land in Argentina, 9 km from Federal. An exact Earth sandwich is possible.
- Songjiang
- 31.03° N, 121.22° E · about 40 m above sea level · 1,973,500 people
- Antipode
- 31.03° S, 58.78° W
- What is there
- Dry land in Argentina
- Nearest town
- Federal, Argentina · 9 km from the antipode
- Nearest big city
- Buenos Aires · 400 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 Songjiang?
Yes: an exact Earth sandwich. Songjiang 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 Songjiang and have a friend put one down 9 km from Federal, Argentina at the same UTC minute, and the whole planet is the filling. The elevation bonus would be about 80 m: Songjiang 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.