Oh boy, it seems that Apple just screwed up big time when it comes to data privacy. Obviously everytime someone attaches an iOS device like the iPhone to a PC or Mac and it does a backup run this backup includes the location data of that iPhone of the last several months. Impressive logging on the one hand and a shame that they did not talk about that in public upfront on the other hand.
There’s a great tool available on GitHub which uses OpenStreetMap to visualize the logged data – it creates a quite impressive graphical representation of where I was the last 6 months…