If you want to have just one map wherein all the information you require about a certain place and its political make-up it would be an advantage to just have it all in one map since all the information you needs is all there. This comes handy when you want to travel light. However, if you want to be more specific in what you need to find then it’s best to place the physical and political elements of the maps or makes separate maps for each element. It makes it easier to read especially when you are looking for a specific element.