GPS

[Yorick Moko]

I'll add a good Belgian beer to that €50!
You will be able to find me and claim it because it seems that here in
belgium all the towers (dating from 2005) are freely available, with
info about them: http://www.sites.bipt.be/antnl/default.asp (just zoom
in and press a red square to see the info).
Or am I wrong and is it not the CellID that is displayed then?
I contacted opencellid and nulaz. Maybe they can incorporate it in
their database.

On Tue, Jun 24, 2008 at 11:23 PM, Joerg Reisenweber <joerg at openmoko.org> wrote:
> Am Di  24. Juni 2008 schrieb Jisakiel:
>> As a matter of fact that database would not even be needed, as we *do* have
> a GPS to get positions. So, for instance:
>>
>> - A location is defined somehow, and *beforehand*. Say manually while being
> there, perhaps with some precission range attached (high: 1m, low: whatever
> error margin the GSM have). Or perhaps entering latitude and longitude,
> gotten from google maps manually or whatever.
>>
>> - That location consists in some GPS coordinates, perhaps some wifis
> visible, and basically in which towers are we connected to.
>>
>> - When in range again of those 3 GSM towers, we know we are "close" to the
> location defined, and depending on the needed precision we can turn on the
> GPS if needed. Perhaps even the distance can be calculated more or less
> easily from the GSM signal information (I'd have to have a detailed look at
>>  http://wiki.openmoko.org/wiki/GTA01_gsm_modem#AT.25EM and its applicability
> to GTA02  , but a quick glance shows some promising information:
>>
>> " This information together with the list of neighbouring cells could be
> used for geolocation and potentially yield better results than using
> Signal-quality values for that.
>> ")
>
> also see:
> http://lists.openmoko.org/pipermail/openmoko-kernel/2008-April/002434.html
>
> and:
> http://lists.openmoko.org/pipermail/openmoko-kernel/2008-June/002987.html
>> Please someone who's good at geographics/maps give it a try and report your
>> findings. If I see a nice map with a couple of intersecting ring-segments,
>> I'll invite you on a beer there :-)
> I'll push up the "reward" to a 50€ for this one ;-) For the first correct and
> nice done map.
>
> And here a link (not only) for people thinking this might be illegal (there
> have been some statements with words to this effect)
> http://www.heise.de/ct/Redaktion/bo/mobilfunk/dateiformat.html
> http://www.heise.de/ct/Redaktion/bo/mobilfunk/viag-netz.zip
>
> cheers
> jOERG
>
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