The maps given are graphical representations of the world. They show connection and cardinal direction (NSEW) rather than area and spacing. Zigzag denote winding linear tunnels, exclamation points represent chests, and question marks are Spirit locations. Orange marks mean that the chest or Spirit is inside of the nearby structure e.g. a house.
To bring up the in game map press start for the main menu. Next using the directional pad select two screens to the left or right. The game also provides a compass in the upper right hand corner of the main traveling screen. The direction Brian is facing points to the top. Make use of it.