Inventors:
Richard A. Ashby - Hebron IL
Paul M. Bouzide - Chicago IL
Vijaya S. Israni - Hoffman Estates IL
David S. Lampert - Highland Park IL
Senthil K. Natesan - Carol Stream IL
Grant S. Killey - Westmont IL
John C. Jasper - Arlington Heights IL
Robert P. Fernekes - Wooddale IL
Jerry S. Feigen - Chicago IL
Assignee:
Navigation Technologies Corporation - Chicago IL
International Classification:
G06F 1730
US Classification:
707102, 707101, 701200, 701208, 701209
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.