Abstract: When displaying facility marks on a map, the facility marks are displayed upon adjusting the height from the ground of each facility mark according to a level expressed by attribute information included in facility data. Thereby, even without selecting a facility mark displayed on the map to display detailed information thereof, a user can confirm and compare the level indicated by the attribute information regarding each facility based on the difference in height of each facility mark. Further, even if there are a plurality of facility marks displayed at the same location or nearby locations on the map, overlap of the facility marks can be avoided by changing the height of each facility mark, and thus the user can easily select a desired facility mark to confirm the detailed information thereof.