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Here's another one: assuming that each point on the surface of the earth belongs to exactly one region. An example: https://en.wikipedia.org/wiki/Steinst%C3%BC

Here's another one: assuming that each point on the surface of the earth belongs to exactly one region. An example: https://en.wikipedia.org/wiki/Steinst%C3%BCcken https://en.wikipedia.org/wiki/Steinst%C3%BCcken Steinstücken was an exclave of West Berlin located in East Germany. It turned out to be inconvenient for the residents to cross borders to get to the rest of Berlin, so a land swap deal was arranged for the road linking Steinstücken to the rest of West Berlin to become part of West Berlin, and some other land elsewhere was given in return. This road, however, crosses a railway on a bridge, and the East Germans didn't want their railway to pass through West Berlin. So the border actually runs under the bridge and above the railway, and if you stand on or underneath the bridge, the actual region you'd be standing in depended on your altitude, even if the latitude and longitude was the same. This is still true today - although the regions are the Bundesländer of Berlin and Brandenburg.

eCa 4y ago
A similar example is[1], an island that every six months switches ownership between France and Spain. So which country it belongs to depends on when you look at it. [1] https://en.wikipedia.org/wiki/Pheasant_Island https://en.wikipedia.org/wiki/Pheasant_Island
- BitwiseFool 4y ago
  I was hoping the wiki article would explain why France and Spain have this arrangement but the only treaties mentioned are the ones signed on the island itself. It seems like something that would be trivial to resolve, but I sense the novelty of the situation is more valuable than any hassles that arise from the peculiarities of the situation.
  - dopidopHN 4y ago
    It’s a small river island … at this point it’s quaint enough to keep as is.
hinkley 4y ago
The Citibank building in New York leans over a church that the developers bought the rights to do. The church owns the land but there's a easement that allows the skyscraper to occupy the air beyond some elevation above it.
ygra 4y ago
Similarly, the Bodensee contains the borders between Germany, Switzerland, and Austria, but the lake itself belongs to all three.

eCa 4y ago

A similar example is[1], an island that every six months switches ownership between France and Spain. So which country it belongs to depends on when you look at it. [1] https://en.wikipedia.org/wiki/Pheasant_Island https://en.wikipedia.org/wiki/Pheasant_Island

BitwiseFool 4y ago
I was hoping the wiki article would explain why France and Spain have this arrangement but the only treaties mentioned are the ones signed on the island itself. It seems like something that would be trivial to resolve, but I sense the novelty of the situation is more valuable than any hassles that arise from the peculiarities of the situation.
- dopidopHN 4y ago
  It’s a small river island … at this point it’s quaint enough to keep as is.

hinkley 4y ago

The Citibank building in New York leans over a church that the developers bought the rights to do. The church owns the land but there's a easement that allows the skyscraper to occupy the air beyond some elevation above it.

ygra 4y ago

Similarly, the Bodensee contains the borders between Germany, Switzerland, and Austria, but the lake itself belongs to all three.