07912638 is referenced by 5 patents and cites 46 patents.

A method for operating a navigation system computes a pedestrian route for travel by a pedestrian. A request to calculate the pedestrian route from an origin to a destination and a walking preference for the pedestrian route identifying a feature of the pedestrian route are obtained. A geographic database associated with the navigation system is accessed for data representing at least one pedestrian path. The data representing the pedestrian path includes lighting level attribute information for the pedestrian path. A valid solution pedestrian route from the origin to the destination comprising a series of connected pedestrian paths that support the walking preference is determined.

Title
Method of collecting information for a geographic database for use with a navigation system
Application Number
12/767136
Publication Number
7912638 (B2)
Application Date
April 26, 2010
Publication Date
March 22, 2011
Inventor
Jason M Borak
Algonquin
IL, US
James R Bennett
San Jose
CA, US
Ellen M Bauer
Chicago
IL, US
Suzanne M McGrath
Chicago
IL, US
Karen A Hopkins
Chicago
IL, US
James M Herbst
Chicago
IL, US
Steven P Devries
Schererville
IN, US
Agent
Lisa M Schoedel
Frank J Kozak
Jon D Shutter
Assignee
Navteq North America
IL, US
IPC
G01C 21/30
View Original Source