The Penghu archipelagoes scatter all over the ocean and extending around 60km north to south, 40km west to east. The total measure of the area of the 90 isles is around 127,9636 square kilometers. 19 isles are populated and the total measure of the area is 124,9392 square kilometers. 71 isles are inhabited with no one and the total measure of the area is 3,0244 square kilometers. The biggest isle is "magong isle" and another 4 big isles by order are west isle, baisa isle, wang-an isle and chimay isle