东西半球的划分作为一个地理知识点,始终困扰着很多的学生,纵然你告诉他这是为了避免将欧洲和非洲分割在东西半球 ,所以是人为规定的,但是他们始终想不通为什么不以0°和180°经线作为东西半球的划分——就像南北半球以0°纬线划分一样。 这虽然已经成为了国内的通识,但是我仍然在想,世界上的其他地方是怎么划分的呢?
Using this demarcation puts portions of western Europe, Africa and eastern Russia in the western hemisphere, thereby diluting its usefulness for cartography, as well as for geopolitical constructs, since all of Eurasia and Africa are typically included in the eastern hemisphere. Consequently, the meridians of 20°W and the diametrically opposed 160°E are often used,[2][3] 还去问了一下湾刘,台湾也是以0°和180°经线划分东西半球的。
总结一下:0°和180°经线划分东西半球和20°W和160°E划分东西半球都有,后者更倾向于从人文角度去考虑世界格局。
最后发个牢骚:当初那些个老爷子要是定0°经线的时候,没那么任性,而是定在现在的20°W,不就没那么纠结了嘛!!!