Patent ID: 9043137
Filing Date: 2015-05-26
Classification: G01C,G09B

Abstract:
1. A map display device, installed in or carried by a mobile entity, for displaying a map on a display device, comprising: a location information acquiring device for acquiring current location information of the mobile entity; a storage device that stores time zone information including boundary information representing a region belonging to a time zone, and time difference information between a standard time of the corresponding time zone and a coordinated universal time thereof for each time zone; a processor; the processor being configured to perform a time zone information acquiring unit for acquiring from the storage device the time zone information of a time zone of a region where the mobile entity is located and an adjacent time zone to the time zone, based on the current location information acquired by the location information acquiring device; the processor being further configured to perform a determination unit for determining, from the current location information acquired by the location information acquiring device and the boundary information in the time zone information acquired by the time zone information acquiring unit, whether or not the corresponding mobile entity is located within a set area which is provided in the range of a predetermined distance from the boundary of the time zone to which the current location of the mobile entity belongs before proceeding to an adjacent time zone; and the processor being further configured to perform a display control unit for causing the display device to display distinctively a time zone to which the current location of the mobile entity belongs and an adjacent time zone which is adjacent to the corresponding time zone through the set area, when it is determined by the determination unit that the mobile entity is located within the set area.