[New software] openBmap logger (GSM positioning)

[Yorick Moko]

isn't more data always preferable? you could still decide not to use them...
cells that we are connected to would recieve a higher "precision" off course,

but if I walk five times around in a city, and I never get connected
to a certain cell, but I know a lot of points where that cell is in
range, and a lot of points where it isn't? I don't find it impossible
that one could distill some information from this.

And even a precision of 30km or more helps the assisted gps from
ublox; so neighbouring cells can certainly be of some help, don't you
agree?


y

On Fri, Feb 20, 2009 at 2:42 PM,  <onen.om at free.fr> wrote:
> For the moment our position is:
>
> We log the cell ids we get connected to.
>
> We do not log the neighbour cells. The reason is: if we are far from the cells,
> we will (maybe, this needs experimentation to my point of view) see the cells
> even very far. I fear that it would stretch the areas, and thus decrease the
> precision, nullifying the benefit of recording those additional cells.
>
> But, my idea, is to use the neighbour cells, to detect the overlapping region
> among areas of cells I currently see, to improve the precision.
>
> Any comments?
>
> Onen
>
>
> Quoting Yorick Moko <yorickmoko at gmail.com>:
>
>> excuse me for the spam, but just thought of something else:
>> do you guys also log information about neighbouring cells, like cellhunter
>> does?
>> this might also be interesting when you have gps coordinates
>> the accuracy of the neighbouring cells are much lower ofcourse, but
>> could also provide some very usefull info
>> y
>>
>> On Fri, Feb 20, 2009 at 2:22 PM, Yorick Moko <yorickmoko at gmail.com> wrote:
>> > And are you guys aware of cellhunter?
>> > http://wiki.openmoko.org/wiki/CellHunter
>> > http://78.47.116.33/~hole/cellhunter/
>> >
>> > you could work together, and maybe also incorporate the "game" concept
>> > for those interested
>> >
>> > y
>> >
>> > On Fri, Feb 20, 2009 at 2:16 PM, Yorick Moko <yorickmoko at gmail.com> wrote:
>> >> Maybe this can help a bit:
>> >> http://www.sites.bipt.be/indexfr1.html
>> >> (click on the first blue link)
>> >>
>> >> it wil display a map of belgium, with all cell towers (already built
>> >> and those with a building permission)
>> >> if you click on a dot, you can get a pdf with information about who
>> >> owns the tower, where it it placed, how many antenna's are on it and a
>> >> lot of other irrelevant data
>> >> too bad that as far as i can see the cellID is not included in the
>> >> documentation :(
>> >>
>> >> y
>> >>
>> >> On Fri, Feb 20, 2009 at 1:49 PM, kimaidou <kimaidou at gmail.com> wrote:
>> >>> Hi, you said
>> >>>
>> >>>> So it should be ok for openbmap guys. That could explain the thing
>> >>>> about "merging" both databases. Any "official" insight on this? I've
>> >>>> been collecting cell information for a few weeks, with some home-made
>> >>>> script, and I'd like to know where I should commit them to.
>> >>>>
>> >>>
>> >>> Could you please make a wiki page and put + explain your script for doing
>> >>> that ? I think we can go very fast if anyone can use them (thinking about
>> >>> how openstreetmap extends..)
>> >>>
>> >>> Thanks in advance
>> >>>
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>> >>>
>> >>
>> >
>>
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