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Observing Outdoor Activity Using Global Positioning System-Enabled Cell Phones.
Yvonne Michael
Erin M. McGregor
James Allen
Stephen Fickas
Published in:
ICOST (2008)
Keyphrases
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global positioning system
mobile devices
navigation systems
multipath
position information
urban environments
wifi
cellular phone
geographic information systems
location information
google maps
human activities
location based services
urban areas