How to Create a Multi Floor Mini Map

I will need to create a Multi Floor Mini Map for a 11 story Building. I will need to have the Mini Map change from the First floor to the second and so on until you reach the top floor. I have been able to create a Mini Map but have not found a way to have the map change as you walk up the stairs to the next level or lower level. Does anyone have any ideas on how to achieve this?

Thank you for all your help!

maybe you coul put a camera in some position that point to the floor and follow the character into x axe, and if the character is in the second floor (some >y point) change to the y position of camera to the next floor.