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To: python-list@python.org
From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject: Re: GeoIP2 for retrieving city and region ?
Date: Mon, 15 Jul 2013 20:34:52 -0400
Organization: IISS Elusive Unicorn
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Xref: csiph.com comp.lang.python:50721

On Mon, 15 Jul 2013 16:25:09 +0300, ??????? <nikos@superhost.gr> declaimed
the following:

>???? 13/7/2013 9:17 ??, ?/? Benjamin Kaplan ??????:
	<snip>
>>
>> It's not telling you where your ISP is headquartered. It's telling you
>> where the servers that you're connecting to are. In your case, you're
>> connecting to servers that your Athens-based ISP has in a Thessaloniki
>> datacenter. The only way to get an accurate location is to use
>> something other than IP- phones like to use a combination of their
>> GPS, a map of the cell phone towers, and a map of wi-fi hotspots (this
>> is one of the things that Google's StreetView cars log as they drive).
>
	<snip>
>
>I have no idea how to implement the solution you proposed.
>These are nice ideas we need to have a way of implement them within a 
>script.
>
>I have no way of grasping a map of cell towers of a  map of wi-fi hotspots.
>
	You don't... The phone company knows where their towers are, THEY do
the triangulation based on signal strength from cell phones on their
network, and they provide that position to the phone. The phone can then
use that data to respond to applications running ON the phone that request
location information using the phone's OS API (which is different for an
Android phone vs Blackberry vs Apple).

	WiFi hotspots would require an application running on the mobile device
accessing some database of hotspots; so the application can do the
triangulation based upon the signal strength it is receiving from the
hotspots (this is the opposite of how the phone location is done: phone
company uses signal strength to assign the control tower, so they can do
the triangulation at their end; WiFi would be triangulated on the mobile as
it is doing the decision of which hotspot to connect through).

	In either case, it still comes down to relying on the client machine
for location services. A desktop machine with a wired connection is not
going to be running location services. A mobile device using WiFi is also
likely to NOT be running a location service -- but has the possibility of
having an application loaded and run which does access a WiFi database to
do triangulation (but this application probably has to run in Administrator
mode as it would need to access the WiFi adapter to scan for hotspots and
signal strengths).
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/