z***l
发帖数: 12 | 1 问一个愚蠢的问题：我怎么看都觉得北美洲比非洲大，为啥说非洲是第二大州？ | r****y
发帖数: 1437 | 2 projection illusion.
remember the area is proprotional to cos(lat)
This is why from 30S to 30N, the area is half of the total spherical
area.
Afica has a big chunk in tropics, while North American is really
further polarward a lot.
【在 z***l 的大作中提到】
: 问一个愚蠢的问题：我怎么看都觉得北美洲比非洲大，为啥说非洲是第二大州？
| z***l
发帖数: 12 | 3 Thanks!
spherical
【在 r****y 的大作中提到】
: projection illusion.
: remember the area is proprotional to cos(lat)
: This is why from 30S to 30N, the area is half of the total spherical
: area.
: Afica has a big chunk in tropics, while North American is really
: further polarward a lot.
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