Dreams of Falling

Some buildings really confuse the GPS tracking for Niantic games. The local hospital does; the circle within which I can do Ingress things hops around and drifts. It also catches up with my movement abruptly after I've been moving for a while. I was in a waiting room in an office building on Monday, and my in-game location was jumping around by blocks. Walking under a concrete bridge or into a narrow alley can also confuse the GPS.

While I'm out and walking around, I'll sometimes stop and stand still to see if GPS drift will move my radius just enough that I can reach something just beyond the current perimeter.