Apple themselves acknowledge that they use location information gleaned from iphones to build a location database. https://www.apple.com/pr/library/2011/04/27A

Apple themselves acknowledge that they use location information gleaned from iphones to build a location database. https://www.apple.com/pr/library/2011/04/27Apple-Q-A-on-Location-Data.html https://www.apple.com/pr/library/2011/04/27Apple-Q-A-on-Loca...