In 1830, mapmakers began to use "North" and "South" on their maps to distinguish the two largest islands and by 1907 this was the accepted norm.
1830 年，地图绘制者开始在地图上使用“北”和“南”来区分这两个最大的岛，到 1907 年，这种用法已成为大家公认的标准。