Label areas or poi inside the map preview

I was wondering if poi maps could be further edited by additng the option to mark areas inside the poi. That way when engaging in a story the player can refer to the specific element inside the poi map instead of franz generating a seperate poi. That way for example if we say have a poi for a park ww could add areas or nested poi like say parking area inside of the map of that park poi. Anyone think this is a good idea?