여기가 시청입니까?
여기가 시청입니까?
a)Is the city hall (located) here?
b) Is this place the city hall?
Context: You are with your friend and you are talking, looking at a map.
It can use to both meaning. According to your situation, I think it's more suitable to a).
If you go to a strange place and try to find out where it is, you could use "여기가 시청입니까" as a meaning of b). : D