Patent ID: 6954696
Filing Date: 2005-10-11
Classification: G01C,G09B

Abstract:
1. A navigation device comprising: a map data storage unit for storing first map data of a first map having a predetermined resolution and for storing second map data of a second map having a predetermined resolution; a resolution conversion unit for selectively converting the resolution of the first map data and the second map data acquired from the map data storage unit; and a display unit having a predetermined display area for displaying two maps simultaneously, a smaller map superimposed on a larger map occupying the entire predetermined display area, wherein said display unit displays one of said first map and said second map over said predetermined display area entirely and the other of said first map and second map is resolution converted by said resolution concession unit and superimposed on a portion of said predetermined display area, whereby both said first map and second map are simultaneously displayed with one of said first map and said second map being converted in resolution.