Navigation device for receiving satellite broadcast distribution of map data

摘要

A navigation device having a satellite broadcast receiver for receiving a broadcast transmission of map data for use in the navigation device. The navigation device also includes a location determining device such as a global positioning system receiver to determine a geographic location of the navigation device. The location of the device is compared with the received map data, and if there is a match, the map data is stored in a computer storage medium and displayed on a screen.