To me I think of two ways to attack the problem. 1) when reports are uploaded, if of each observation add the timestamp was made, should not be difficult to discard observations where necessary move over, by example, 200km/h.
I have found that Endomondo* makes this type of filtering, in early versions were gps failures and appeared 'spikes' on the path. And for a plane takeoff when the airplane reaches a speed the app discards these observations. 2) as said in other message, you could divide the map into small areas and locate plots with cell towers or wifi aps totally different to nearby. * http://www.endomondo.com/ (Sorry my bad english) 2014-03-04 14:00 GMT+01:00 Vincent <[email protected]>: > I agree that the location service should be immunized against false data. > Is there already something done? > > > 2014-03-04 11:59 GMT+01:00 André Fiedler <[email protected]>: > > > And if someone feeds real world data, but does: > > > > latitude + random() > > longitude + random() > > > > ? > > > > Wouldn't it mess up the geolocation service? Maybe 1 out of 100 won't > mess > > it up, but 1 out of 2 will. > > > > greetings, > > SunboX > > > > Am 03. März 2014 um 23:23 schrieb Chris Peterson <[email protected] > >: > > > > > > On 3/3/14, 1:57 PM, Felix Baumann wrote: > >> > >>> Is it possible to write an algorithm to delete those plots? (they look > >>> faked/wrong and useless to me) > >>> > >> > >> Fortunately, geolocation clients probably won't be affected by fake data > >> because the fake data probably won't match the cell tower or Wi-Fi MAC > >> addresses clients see in the real world. :) > >> > >> And even if someone feed fake data into the database (which is > >> inevitable), the service geolocates clients using multiple cells or > >> Wi-Fi APs so any bogus outliers that appear far away will be filtered > out. > >> > >> > >> chris > >> _______________________________________________ > >> dev-geolocation mailing list > >> [email protected] > >> https://lists.mozilla.org/listinfo/dev-geolocation > >> > > _______________________________________________ > > dev-geolocation mailing list > > [email protected] > > https://lists.mozilla.org/listinfo/dev-geolocation > > > > > > -- > Vincent (caméléon) > _______________________________________________ > dev-geolocation mailing list > [email protected] > https://lists.mozilla.org/listinfo/dev-geolocation > -- -=stripTM=- http://mozilla-hispano.org http://twitter.com/striptm _______________________________________________ dev-geolocation mailing list [email protected] https://lists.mozilla.org/listinfo/dev-geolocation
