UPDATE METHOD FOR DATABASES, PARTICULARLY NAVIGATION DATABASES

摘要

A method for updating a local database (10; 11), particularly a navigation database, which is divided into segments (17; 24, 26; 28, 27; 30, 31), by transmitting an updated segment (17; 24, 26; 28, 27; 30, 31) from a central database divided into appropriate segments to the local database (10; 11) and storing the updated segment (17; 24, 26; 28, 27; 30, 31) in the local database (10; 11), avoids inconsistencies when updating is only in stages by mapping the segments (17; 24, 26; 28, 27; 30, 31) in the local database (10; 11) onto a hierarchic model and, when the segment (17; 24, 26; 28, 27; 30, 31) is updated, also updating those segments (17; 24, 26; 28, 27; 30, 31) on which the segment (17; 24, 26; 28, 27; 30, 31) is dependent.