ubuntu-phone team mailing list archive

[Felipe De La Puente <fdelapuente@xxxxxxxxx>]

I think that the weak link here is the GNSS assistance mechanism used in
ubuntu.

Having a good assistance method the time to first fix should be within
seconds or worst case a couple of minutes. Am I right?

If the system is able to achieve <1min time to first fix, then you don't
need to give the last known position to the client apps anymore.

Now, let's say you are inside a building, then you need an alternative
method to determine your location, like using visible cell towers or
hotspots.

Best Regards,
Felipe.


On Mon, Feb 29, 2016 at 5:46 PM, Alan Pope <alan.pope@xxxxxxxxxxxxx> wrote:

> Hi Thomas,
>
> On 29 February 2016 at 15:35, Thomas Voß <thomas.voss@xxxxxxxxxxxxx>
> wrote:
> > On Mon, Feb 29, 2016 at 12:38 PM, Alan Bell <alanbell@xxxxxxxxxx> wrote:
> >> it isn't really about that, it is about providing less broken location
> data
> >> to applications that ask for it. The current situation is that if an
> >> application requests location data it gets given random coordinates of
> >> somewhere you may have been to in the last week or so.
> >
> > Hmmm, I'm surprised by that statement. The service hands out the last
> > known good location, together with a timestamp
> > and the accuracy aged out. If applications fail to handle the
> > respective data correctly, it is not the service at fault here.
> >
>
> I spent a week in Germany last week. At lunch time we wandered outside
> from the exhibition centre and opened HERE maps to find a nearby kebab
> shop (don't ask). Ogra pulled out his MX4 running rc-proposed and used
> HERE to find a local shop and navigate to it. Our destination seemed a
> ludicrous distance away from our current location, until we noticed
> the current location on the map was actually the hotel we left some 5
> hours previously. Cue a few moments of stabbing to refresh the app to
> make it realise we've moved (quite a bit as it happened).
>
> While this may be "Working As Designed", it's not "Working in a
> meaningfully useful way". Having a location which is "aged" by over
> half a working day is pretty useless on a mobile device. Other
> platforms don't do this (in my experience), neither should we, battery
> life be dammed, frankly. I want the map to show me where I am now, not
> where I ate breakfast sometime in the past.
>
> >> Then it thinks about
> >> refreshing the location and refining it over the next few minutes or so
> if
> >> the application is one that asks where you are again and again. If it
> could
> >> take a peek at the satellites every so often then it would enable
> several
> >> additional classes of application and would be less broken for things
> that
> >> only ask once.
> >>
> >
> > That's incorrect. The service keeps on delivering updates to
> > applications that have requested continuous location updates.
>
> Then there is a bug in the platform. The browser (in which HERE runs)
> is a default app and the location service is also pre-installed. There
> is an issue here which clearly need nailing as I'm certain we're not
> the only 3 people in the world to experience this.
>
> Cheers,
> --
> Alan Pope
> Community Manager
>
> Canonical - Ubuntu Engineering and Services
> +44 (0) 7973 620 164
> alan.pope@xxxxxxxxxxxxx
> http://ubuntu.com/
>
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