06691128 is referenced by 56 patents and cites 3 patents.

A system and method for providing geographic data to end users' computing platforms. A server maintains downloadable geographic data that are organized into pre-computed parcels that correspond to pre-determined sub-areas into which the entire geographic region serviced by the server is divided. The server responds to requests from the end users' computing platforms for navigation services and data by sending selected pre-computed parcels of geographic data to the end users' computing platforms. The end users' computing platforms store the pre-computed parcels received from the server in a cache memory. The end users' computing platforms use the data in the pre-computed parcels to provide navigation-related features locally.

Title
Navigation system with distributed computing architecture
Application Number
9/838094
Publication Number
6691128 (B2)
Application Date
April 19, 2001
Publication Date
February 10, 2004
Inventor
Philip Robare
Chicago
IL, US
Aaron Crane
Palatine
IL, US
Senthil Natesan
Carol Stream
IL, US
Agent
Lawrence M Kaplan
US
Frank J Kozak
US
Jon D Shutter
US
Assignee
Navigation Technologies
IL, US
IPC
G06F 17/30
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