Figure 2. As we see, TaiPower has divided Taiwan into 80 km wide, 50 km tall lettered rectangular sectors. For instance, Taizhong County, Dongshi Township, which lies in the G sector.

• 如附图二所示，以东西宽八十公里，南北长五十公里为范围，将台湾划分如图上区域并以英文字母代表所在位置大区域，如台中县东势镇位置为G大区。