| 摘要 |
PROBLEM TO BE SOLVED: To provide a map display device capable of presenting a transition of an information number corresponding to areas and buildings.SOLUTION: A navigation device 100 includes: a map drawing section 14 preparing drawing data displaying a map image including roads and buildings; a rate of change calculation section 36 calculating a rate of change showing a degree of the change of a word-of-mouth information number corresponding to the buildings; a rate of change drawing section 38 preparing drawing data capable of discriminating the degree of the change of the word-of-mouth information number on the basis of the calculated rate of change; and a display processing section 60 in which the drawing data prepared by the map drawing section 14 and the drawing data prepared by the rate of change drawing section 38 are input and which overlaps the image capable of discriminating the degree of the change of the word-of-mouth information number on the map image and displays the overlapped image on a screen of a display device 6. |
