07433889 is referenced by 66 patents and cites 37 patents.

A method for collecting data for a geographic database is disclosed. Speed and position data are collected using a plurality of mobile computing platforms moving in a geographic region. The speed and position data are analyzed to identify a location of a traffic sign corresponding to a change in the speed. The geographic database is updated to indicate the location of the traffic sign.

Title
Method and system for obtaining traffic sign data using navigation systems
Application Number
10/214216
Publication Number
7433889 (B1)
Application Date
August 7, 2002
Publication Date
October 7, 2008
Inventor
Mark A Barton
Schaumburg
IL, US
Agent
Lisa M Schoedel
Frank J Kozak
Jon D Shutter
Assignee
Navteq North America
IL, US
IPC
G06F 19/00
G06F 17/00
G06F 7/00
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