I noticed waaay too many APs stacked on top of each other here http://www.wigle.net/gps/gps/Map/onlinemap/?lat1=46.05196697616577&lat2=46.052481325149536&long1=14.501251888275146&long2=14.501938533782958 It is a city centre, APs are dense in reality, but not that dense. More likely it was that ...