A purpose of this map is to inform a customer an entrance of parking lot when using an exhibit in a building.
A 1F and 3F are an exhibit hall, and B2, B3, and B4 are a parking lot.
To convey information, it seems five strategies use as below:
Three-Dimensional Projection: Since parking lots and exhibition halls are made up of different layers, it is more efficient to convey information in 3D than to provide it in 2D. Furthermore, it seems a 3D representation is adequate to show the vertical elevator connection between layers: the parking lot and the exhibition hall.
Proximity (Gestalt): Designed to perceive customers to efficiently distinguish between elements on the same floor and elements on the other floor.
Good Continuation (Gestalt): Designed to recognize vertically connected line-elevators as a group, even though they are displayed on each floor.
Color: Emphasized each element which has the same attribute using different colors.
Consistency: Used the same font style-size and color for elements having the same attributes: parking lot is marked with A-K, and the exhibition hall is marked with A-E