Map update data delivery method, map update data delivery device and terminal device

摘要

A map update data delivery method includes: storing update unit data compiled in correspondence to each set of update data used to update map data in a specific version to map data in another version for a map element by incorporating update data for another map element that must also be updated in coordination with a change made for the map element; searching for base update data needed to update a map data for a map element designated as an update target in a map area specified at a terminal 101 as a map data update target; searching for related update data with a relation to contents of update data included in the base update data searched; and transmitting the base update data and the related update data to the terminal 101.