Hi. As of Friday we have added GeoIP as an additional source of location information. This is based on a city-level commercial database. The city level database doesn’t contain a range or accuracy field, so we currently hardcode the value to 40km as an estimate of a typical upper bound for a city size. We are looking at ways to improve that, as the actual result is sometimes only accurate to the country level and should report a larger accuracy value in those cases.
Right now the accuracy field is also hardcoded to 500m for WiFi-based results and 35km for cell-based results. We are working on improving those numbers as well. I think the stumbler currently doesn’t show the accuracy level. It might be a good idea to add this, so we can adjust the zoom level accordingly. Maybe we could even show both the GPS-based result and the service result at the same time, so it easier to spot if circle around the service result includes the GPS based position or not. So in this case there’s no erroneous data. Surfacing the accuracy level should also make it clear which source (ip, cell, wifi) was used to determine the location. Hanno On 17.03.2014, at 11:07 , Vincent <[email protected]> wrote: > Hi, > > Yesterday I was stumbling near my home and I have tried to see if > mozstumbler can "localize" me. > > So I activate the GPS and the wifi, launch Mozstumbler and push the > "location" icon. My surprise was big when I see that Mozstumbler localize > me at 200 km, somewhere in Paris! > > I wonder how it is possible and what can be done to correct this erroneous > entry in the database. > > -- > Vincent (caméléon) > _______________________________________________ > 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
