Yes, it's significant to note that Google (à la Street View scanning) is not the only party that's made a concerted effort to collect them. Whether Google's pu

Yes, it's significant to note that Google (à la Street View scanning) is not the only party that's made a concerted effort to collect them. Whether Google's purchased (or absorbed) such data from others, I don't know. I speculate that further routes for collection may be available. E.g. a user uses a wi-fi connection with a device that has geo-location turned on, and "Bob's your uncle".