Editing Talk:2519: Sloped Border
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The Earth is not a sphere. In general the local vertical does not go through the center of the Earth. I would expect international law to be based on the local vertical (easily measured since antiquity by plumb bob or similar) rather than the line though the Earth's center (requiring surveying precision not widely available till the late 20th century). Or perhaps international law just defines the Earth as flat.[[Special:Contributions/172.68.65.107|172.68.65.107]] 20:17, 24 September 2021 (UTC) | The Earth is not a sphere. In general the local vertical does not go through the center of the Earth. I would expect international law to be based on the local vertical (easily measured since antiquity by plumb bob or similar) rather than the line though the Earth's center (requiring surveying precision not widely available till the late 20th century). Or perhaps international law just defines the Earth as flat.[[Special:Contributions/172.68.65.107|172.68.65.107]] 20:17, 24 September 2021 (UTC) | ||
...it probably does, alongside Pi being 4. ;) [[Special:Contributions/172.70.42.129|172.70.42.129]] 13:15, 25 September 2021 (UTC) | ...it probably does, alongside Pi being 4. ;) [[Special:Contributions/172.70.42.129|172.70.42.129]] 13:15, 25 September 2021 (UTC) | ||
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If the border surface is tilted off vertical and also following a curved line on the surface, at sufficiently high altitude the border surface can self-intersect in a complex manner, producing enclaves of air/space/underground which are disconnected from the country that they belong to. That is, assuming you count the parity of border crossings to identify which country owns the space. You could also make a greedy border so the first time you cross is you are in the other country and stay there even in the detached enclaves. The enclaves would be even more exciting where the borders of three countries meet. I'm not even sure how the parity counting would work, when you are in country A and cross the B/C boundary. [[Special:Contributions/108.162.241.143|108.162.241.143]] 03:31, 28 September 2021 (UTC) | If the border surface is tilted off vertical and also following a curved line on the surface, at sufficiently high altitude the border surface can self-intersect in a complex manner, producing enclaves of air/space/underground which are disconnected from the country that they belong to. That is, assuming you count the parity of border crossings to identify which country owns the space. You could also make a greedy border so the first time you cross is you are in the other country and stay there even in the detached enclaves. The enclaves would be even more exciting where the borders of three countries meet. I'm not even sure how the parity counting would work, when you are in country A and cross the B/C boundary. [[Special:Contributions/108.162.241.143|108.162.241.143]] 03:31, 28 September 2021 (UTC) |