this is the best and most comprehensive suikoden world map floating around the internet. from what i can tell, the creator based it on existing world maps from the games, information inferred from the games, and the world map that came with (i think) the s5 collector's edition japanese release (or maybe it was preorders that it came with?). there is an identical map to this out there that has the section west of toran filled in as the arcadian monarchy, which, if i'm being completely honest, i have no clue what that is. i'm in the middle of a complete series playthrough right now and it hasn't come up once to my memory and i'm about to start tactics then finish off with 5.
my point being, if you have any questions of geography they can either be answered by this map or you can create your own answer with this map as a guide.
edit: i think the whole arcadian monarchy thing was just a fanfic edit for a text based forum rpg or something, but correct me if it's actually in one of the games.