The Hokuten (Northern Sky) control lands mainly on the left side of the map, and Nanten (Southern Sky) control lands on the right. But remember that old maps had east at the top, and that's where north and south went.
Cloud's birthday in Final Fantasy VII is in August, which should make him a Leo, but in Tactics his zodiac sign is Aquarius. Who does has the right birthday to be an Aquarius? Aeris.