1. A map information device comprising: a storage unit for map data recorded in a rectangular coordinate system; a route search unit for searching for a route based on information on two geographical points; an area generator unit to set an area along the route between the two geographical points; and a map search unit to search for and output the map data of the area, wherein the area generator unit establishes the area by adding corrections to correct a width of the area based on latitude values of the route.