2002-221422 is referenced by 9 patents.

PROBLEM TO BE SOLVED: To easily report to an end user, who uses map data in a navigation system, on errors, imprecision or another problem sensed from the map data such as a calculated route or guidance with low quality.SOLUTION: The end user employs a user interface of the navigation system to show the sensed error, the imprecision or the other problem. The navigation system includes a reporting program that responds to the indication showed by the end user and starts running. The reporting program collects information representing the error, the imprecision or the other problem and sends the report including the collected information to a developer of the map database. The developer of the map database can use the information in the report in order to update the map database.

Title
Navigation system with property for reporting error
Application Number
2001-228707
Publication Number
2002-221422
Application Date
June 22, 2001
Publication Date
August 9, 2002
Inventor
Kaplan Lawrence M
Casino Roy
Burton Mark
Ohler Jean
Assignee
Navigation Technol
IPC
G09B 29/10
G09B 29/00
G08G 01/137
G06F 17/30
G01C 21/00