Earth Sandwich / City antipodes / Alexandria
Antipode finder · Egypt
The antipode of
Alexandria.
Draw a straight line from Alexandria (31.20° N, 29.92° E) through the centre of the Earth and it comes out at 31.20° S, 150.08° W, in the South Pacific Ocean, 681 km from the nearest dry land, off the coast of French Polynesia. The other slice of an Earth sandwich would sink.
- Alexandria
- 31.20° N, 29.92° E · at about sea level · 5,263,542 people
- Antipode
- 31.20° S, 150.08° W
- What is there
- The South Pacific Ocean; the sea floor there lies about 4,920 m below the surface
- Nearest dry land
- 681 km from the antipode, on the coast of French Polynesia
- Nearest town
- Moerai, French Polynesia · 981 km from the antipode
- Nearest big city
- Auckland · 3,281 km from the antipode
- Sandwich verdict
- SOGGY the other slice lands in open water
- Nearest exact spot
- 1,410 km away, near Jeddah, Saudi Arabia ⇄ 400 km from Otepa, French Polynesia
Can you make an Earth sandwich from Alexandria?
No, not from Alexandria itself. The other slice would land in the South Pacific Ocean, 681 km from the nearest dry land (French Polynesia), where the sea floor lies about 4,920 m below the surface. Boats do not count (Sandwich Law § 1.3).
The nearest place from which an exact Earth sandwich is possible is 1,410 km from Alexandria, 27 km from Jeddah, Saudi Arabia. Its other slice would go down 400 km from Otepa, French Polynesia.
Alexandria is on the The South Pacific ↔ the Sahara & Sahel 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.