Earth Sandwich / City antipodes / Callao
Antipode finder · Peru
The antipode of
Callao.
Draw a straight line from Callao (12.05° S, 77.13° W) through the centre of the Earth and it comes out at 12.05° N, 102.87° E, on dry land in Cambodia, 30 km from Anlong Reab. An exact Earth sandwich is possible.
- Callao
- 12.05° S, 77.13° W · about 40 m above sea level · 1,226,200 people
- Antipode
- 12.05° N, 102.87° E
- What is there
- Dry land in Cambodia
- Nearest town
- Anlong Reab, Cambodia · 30 km from the antipode
- Nearest big city
- Phnom Penh · 230 km from the antipode
- Sandwich verdict
- EXACT land lies opposite land
- Elevation bonus
- +800 m (40 m here, 760 m there)
Can you make an Earth sandwich from Callao?
Yes: an exact Earth sandwich. Callao 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 Callao and have a friend put one down 30 km from Anlong Reab, Cambodia at the same UTC minute, and the whole planet is the filling. The elevation bonus would be about 800 m: Callao sits about 40 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.