Interface layer for navigation system

US6370539B1 · kind B1 · utility

Assignee

• Navigation Technologies Corp. · US

Inventors

• Richard A. Ashby · Blue River, US
• Paul M. Bouzide · Chicago, US
• Vijaya S. Israni · Hoffman Estates, US
• David S. Lampert · Highland Park, US
• Senthil Natesan · Carol Stream, US
• Grant S. Killey · Westmont, US
• John Jasper · Arlington Heights, US
• Robert Fernekes · Yorkville, US
• Jerry Feigen · Chicago, US

Key dates

• Filing date: Oct 23, 2000
• Grant date: Apr 9, 2002
• Expiry date: Dec 28, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S707/99943
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An improved method and system that provides for a data access interface layer in a navigation system. The navigation system is of the type that includes a navigation application software program that provides navigating features to a user of the system and a geographic database stored on a computer-readable storage medium wherein the geographical database includes information relating to the geographical region about which the navigation system provides the navigation features to the user. The data access interface layer is preferably stored in the navigation system as a library of software functions. The data access interface layer operates in conjunction with the navigation system application software. The data access interface layer isolates the navigation application software from the geographic data which are stored on the storage medium. The data access interface layer intercepts requests by the navigation application software for geographic data. The data access interface layer retrieves geographic data from the storage medium and converts the data into a format usable by the navigation application software. The data access interface layer also provides for memory management…