By the way, I remember a similar case in Russia. A telco company published a heat map created from GSM location data that reflected where in the city yound peop

By the way, I remember a similar case in Russia. A telco company published a heat map created from GSM location data that reflected where in the city yound people spend their time. One of the "hot" spots on the map was in a remote forest area with nobody living around. Most probably it was a military object.