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A system and method for implementing a smooth scrolling function in a map display tool used with a navigation system and a map database. The system includes a map processing layer in the map display tool having a multi-tasking abstraction layer and a synchronization object for allowing portability b

A system and method for implementing a smooth scrolling function in a map display tool used with a navigation system and a map database. The system includes a map processing layer in the map display tool having a multi-tasking abstraction layer and a synchronization object for allowing portability between different platforms. The method includes the steps of updating a display from a first graphics buffer while executing a look-ahead process in the background and filling a second graphics buffer with map information on a predicted future position.

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[ We claim:] [1.]1. In a navigation system having a display, a map database and a navigation application having a map display program, a method of scrolling a map on the display comprising the steps of:providing a first graphics buffer holding map information regarding a geographic region containing

[ We claim:] [1.]1. In a navigation system having a display, a map database and a navigation application having a map display program, a method of scrolling a map on the display comprising the steps of:providing a first graphics buffer holding map information regarding a geographic region containing a first location position, the map information in the first graphics buffer corresponding to data in a first map object;providing a second graphics buffer for holding auxiliary map information regarding a geographic region for a predicted future location;displaying a map area on the display, the map area comprising a portion of the map information in the first graphics buffer; andexecuting a look-ahead process for rendering auxiliary map information to the second graphics buffer.