[@Polybius] I'd say the map is the mortal realm and gods are free to choose whether their realm is part of it or inhabits a sort of pocket dimension. Both sides have advantages. A pocket dimension realm is basically an inpregnable fortress where no God could be harmed and where they can work their machinations. However, it counts for nothing if you can't manipulate the mortal world. While those who keep their realm within the mortal world hold the advantage in influence, they are obviously more vulnerable.