Hi
Location is provided by wifi and mobile cells. It depends on Google systems
Hm, even when there is a recent more accurate position provided by GPS?
...why would you like to use polygons?
Enviado desde mi SM-N9005 mediante Tapatalk
There aren't lots of circular areas in a city.
For the moment what i'm trying to do is have it switch off wifi and switch on mobile data whenever i leave my building, and the reverse when i'm back home; but avoiding false positives caused by dropped connections or crazy location miscalculation. What i have done right now for that is to check for both not being connected to my home wifi and being outside of the building (need the two 'cause neither one alone is reliable; my apartment got thick walls and a very RF polluted neighbourhood, and watching the map (and my location history) i've seen my location get wrong by at least a couple city blocks once in a while (a few times i've even teleported to the middle of the Atlantic for an instance, according to my phone); checking for both makes it so false positives require the two unrelated measures to be incorrect at the same time, much less likely).
Though, if it doesn't use GPS at all, it means that once i'm out of the building all i'll have is the position of the cell tower (i don't think it does tower triangulation/trilateration; by the looks of it, it just looks up where the current tower should be based on it's ID or something of the sort). And since my building doesn't got it's own cell tower, once i'm out AD will never know i'm back home unless i manually enable wifi again... Or does the geofencing functionality take in consideration the error radius?
ps: Hm, now i'm remembering back when i had Symbian phones, there was an app that would show the direction to the current cell tower, with 120 degrees of precision (i believe the towers got 3 directional antennas, aimed 120 degrees apart, and they identify themselves differently); usually, as long as there wasn't too much stuff between me and the antenna it was easy to find them by eye with the help of that app. Something like that would already be a tad better than the omnidirectional radius thing; not much help if geofencing still ignores the radius though.