Map image display system, map image display method, and computer program

A map image display system is disclosed, which comprises a map data acquisition unit that acquires map data that is divided into a plurality of areas and hierarchically structured into a plurality of layers based on an amount of road network information, and an image display unit that displays a map image of a display target area on a display device based on the map data acquired by the map data acquisition unit, wherein an area division unit, an image generation unit, a transmittance change unit and a map image drawing unit are provided.