Why do GPS systems give wrong directions?

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  • "GPS Steering You in the Wrong Direction?" ABC News. 2008.http://abcnews.go.com/GMA/Consumer/story?id=4136269
  • "Introduction to the Global Positioning System for GIS and TRAVERSE." Corvallis Microtechnology, Inc. 2000. http://www.cmtinc.com/gpsbook/index.htm
  • Meyer, David. "Boom predicted for GPS-enabled handsets." CNET News. 2008. http://news.cnet.com/Boom-predicted-for-GPS-enabled-handsets/2100-1039_3-6226211.html
  • Navteq. http://www.navteq.com/
  • Ray, Bill. "Half of GPS users given duff information." The Register. 2007. http://www.theregister.co.uk/2007/08/04/gps_wrong_half_the_time/
  • Shaw, Keith. "GPS data wrong? Now you can help." NetworkWorld.com. 2007. http://www.networkworld.com/community/?q=node/10299
  • Tele Atlas. http://www.teleatlas.com/index.htm