If you haven’t heard yet, your iPhone creates a record of all the places you go, and the information is stored in a database on your computer whenever you sync with iTunes. Tracking started June 2010 with software IOS version 4. Before June 2010 the iPhone was not tracking your location.
If you sync your iPhone to someone else’s computer they might have your location data on their computer. My roommate charges his phone on my computer and I have his location information on my computer–not cool.
In the past week since the location database was discovered people have written visualization programs. Here are three.
PC: huseyint.com/iPhoneTrackerWin –created the visualization above
Mac: julianpistorius.com/journal/2011/04/iphone-tracker-application-32-bit
Another Mac One: petewarden.github.com/iPhoneTracker