Regarding the location and algorithm stuff, there's a few things.
1) If they were telling the truth about where the series was filmed via that map at the start of the program (was it maybe on episode 1 or all, I can't remember), then the reports they were using weren't public as that area has little if any worthwhile history of reports and therefore must have been private, in which case an algorithm in the grand sense of the word isn't needed at all as the data would be so small and using the word would be a little deceiving.
2) The map which I talk about that was shown, wasn't the real location that the series was shot in and therefore they lied about it, and therefore i'd then assume probably correctly that they lied about other things, including having some kind of magical algorithm.
3) Anyone with even the slightest hint of interest on public BF Report algorithms and databases knows there's only one out there worth its salt, and it lives right here on this very forum.