On Fri, 28 Mar 2008 10:51:14 +0100, Andy Green <[EMAIL PROTECTED]> wrote:

We get very approximate "part of town" location information for free
from GSM cell number just by being a phone.  We get +/- 100m specific
location information from powering the WLAN and doing an AP scan
periodically, studying the AP MAC addresses we can hear beacons from.
So it can differentiate between being at home, office, lunch,
travelling, visiting and so on autonomously.

What's the advantage of the other ways of locating yourself (GSM, WiFi) over GPS?

We don't neccesarily know the GPS coordinates or name of a location, but
with such a daemon we can pretty cheaply know if we are back there
without needing GPS, and we can recognize it as a "place" and subtly
change contexts on the phone, different background, as Alexey said ring
or vibrate, different sorting order for contacts based on who you
contacted from that place, etc.

The latter is very interesting! Indeed: I live in Norway but sometimes visit Russia. I rarely call my Russian friends while I'm in Norway because of the high international call rates, but when I come to Russia, I'm very likely to call them!


--
Alexey Feldgendler <[EMAIL PROTECTED]>
[ICQ: 115226275] http://feldgendler.livejournal.com

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