Database system for navigation device

摘要

A database system for a global positioning (GPS) vehicular navigation device having a first database including street information data and a second database, including location information data that is independent of the first data. The database system includes a working memory unit including a first memory area and a second memory area separate from the first memory area. The first data includes street information stored in the first memory area and the second data includes location information stored in the second memory area.