Patent ID: 7089546
Filing Date: 2006-08-08
Classification: G01C,G06F,Y10S

Abstract:
1. A upgrade method for navigation data that writes over and upgrades navigation data in a memory device, which is installed in a navigation apparatus such that it can be freely installed and removed and which stores rewritable navigation data and user data, the method comprising: a checking process of checking the memory status of the memory device that is removed from the navigation apparatus and determining whether there are the navigation data to be upgraded and the user data to be saved; a user data saving process that depending on the results of the checking process saves the user data, which are stored in the memory device, in a backup memory device such that they can be identified as saved data; a navigation data writing process that depending on the results of the checking process writes over the navigation data, which are stored in the memory device, with upgraded navigation data; and a user data rewriting process of reading the saved data, which correspond to the memory device, from the backup memory device and rewriting the saved data in the memory device as the user data.