Method and Device for Managing Map Data of a Digital Map for a Navigation Apparatus

A device for managing map data of a digital map of a navigation apparatus, the device comprising:

• a non-transitory computer readable medium having instructions stored which when executed carry out the method of:
• storing original map data of the map data to be managed in a memory allocated to the navigation apparatus;
• allocating, in each case, the original map data to one of a number of original map tiles;
• allocating, in each case, a validity indicator to the original map tiles;
• in an event of an update of the map data, storing permanently associated update map data that are allocated to an update map tile, wherein a respective update map tile is provided for replacing an associated map tile;
• after successfully storing the associated update map data of the respective update map tile, setting the validity indicator of the associated original map tile to invalid;
• and
• loading, during operation of the navigation apparatus, the respective original map tile if it's allocated validity indicator is valid and, otherwise loading the update map tile allocated to the respective original map tile.