On 16/07/14 21:33, Chris Peterson wrote: > Because MLS coverage is spotty in some regions and some Firefox OS > devices are shipping without GPS, Gerv suggested that we add UI so > Firefox OS users can set their location on a map. A device could build > its own stumbling database of Wi-Fi and cell data with user-defined > position data.
To be clear: the primary goal of my suggestions is to improve the UX for geolocation on GPS-less devices. If it also improves MLS, so much the better. My idea is roughly this. Whenever an app asks for a location: * Ask MLS where it thinks the device is, best effort, with an error range (could be cellID, or GeoIP) * Pop up a "this app wants to know your location. We think you are somewhere here:". Below, there's a map (we need to do offline map tile caching, ideally) with a gradated semi-transparent circle on it of the appropriate radius. Not having a pin shows the user the location is only approximate. * Buttons are something like: "Deny Request", "Give Approximate Location" and "Pinpoint Myself" * If they press "Give Approximate Location", we pass on the data from MLS direct. * If they press Pinpoint Myself, a pin appears in the middle of the map, and the buttons change to "Deny Request" and "Done". They can drag the map under the pin until the pin is in the place they want to reveal. When they hit "Done", the location is passed to the app. Optionally, the system then stumbles their current location (and IP) and remembers the 'environment'. Next time, if we are in a place we know, instead of the gradated circle, we have a map with a pin placed where the user placed it last time. > However, the UX would be tricky. If a user picks the wrong location, how > do they correct it? They get an option to alter the submitted location every time. This doesn't work well with apps which ask for location on a continuous basis, like turn-by-turn routing, but you can't do that without a GPS anyway. Perhaps we cache the answer. I assume using the motion sensors for dead reckoning gets inaccurate very fast... Gerv _______________________________________________ dev-geolocation mailing list [email protected] https://lists.mozilla.org/listinfo/dev-geolocation
