The town map, as with the entirety of the inventory screen, appears on the bottom touch-screen. It shows not only where what building is where, but where your relative location is. One of the newest features in the game is that when you first talk to Rover he asks you to identify the town map. You then can choose your map instead of having to stick with a randomly chosen map. The maps in Animal Crossing: New Leaf are more detailed and will be able to provide better help to the player when the map is in use.
Below is a key that explains what each symbol you will find on the new map, means: