Patent ID: 8706693

Claim:
A map update data delivery method, comprising: storing, in an atomic map updater database of a map update system that updates map data at a terminal, an atomic map updater corresponding to difference update data used to update map data in a specific version to map data in another version for a map element; receiving an update data verification request which includes identification information of a map area specified by a user of the terminal and a version of map data; searching the atomic map updater database for a base atomic map updater corresponding to difference update data needed to update a map data for a map element in the map area specified by the user; generating a first summary information for the base atomic map updater; searching the atomic map updater database for a related atomic map updater corresponding to other difference update data with a relation to contents included in the base atomic map updater; generating a second summary information for the related atomic map updater; transmitting the first summary information for the base atomic map updater and the second summary information for the related atomic map updater to the terminal; receiving an update data transmission request for difference update data selected by the user based upon the first summary information and the second summary information transmitted to the terminal; and transmitting the difference update data selected by the user to the terminal.