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Re: GeoIP2 for retrieving city and region ?

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On Sat, Jul 13, 2013 at 9:04 AM, Dennis Lee Bieber
<wlfraed@ix.netcom.com> wrote:
> On Sat, 13 Jul 2013 02:47:38 +1000, Chris Angelico <rosuav@gmail.com>
> declaimed the following:
>
>>
>>Oh, and just for laughs, I tried a few of my recent mobile IP
>>addresses in the GeoIP lookup. All of them quoted Melbourne someplace,
>>some in the CBD and some out in the suburbs, but all vastly wrong, and
>>places I haven't been. But I'd never expect it to be accurate on
>>those.
>>
>         Well... the MaxMind demo of "my IP" did get the proper metropolitan
> area... But they list the ISP as "AT&T"... My real ISP is Earthlink
> (piggybacking on AT&T DSL service).
>
>         The Lat/Long, however shows as
>
> 42.9634 -85.6681
> whereas a recent GPS readout shows
> 42.9159 -85.5541
>
> or 2m50s too far north, and 6m50s too far west.
>
>         Same website, accessed from my Blackberry phone, gave a result of
> "United States, NA" and location 38 -97

When you try to place a visitor geographically by IP address, the only
thing you can be absolutely 100% certain of is which RIR they're at
(proxies aside - you're just testing the proxy rather than the
ultimate origin). Country is also highly likely to be right, though
not certain (I've never known it to be wrong, but I've never been able
to confirm what happens with some of the small European countries -
for all I know they could share ISPs and netblocks). Anything tighter
than that is goign to be pretty hit-and-miss. But I have to say, it's
improved a lot over the years. Back in the early 2000s - say, about 8
years ago, I think - I was playing with this sort of technology, and
it placed me in Sydney. That's one state away, lots of rivalry
separating us (friendly rivalry, of course; in a country that's doing
its best to kill us all, we can't afford to really hate each other),
and roughly 750-1000km wrong by distance (depending on how you measure
- most people don't put an odometer on a crow). So at least now it
gets within the same degree of latitude and longitude... most of the
time.

ChrisA

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GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-12 17:18 +0300
  Re: GeoIP2 for retrieving city and region ? Dave Angel <davea@davea.name> - 2013-07-12 11:32 -0400
    Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-12 18:52 +0300
      Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-12 19:32 +0300
        Re: GeoIP2 for retrieving city and region ? Grant Edwards <invalid@invalid.invalid> - 2013-07-12 16:38 +0000
          Re: GeoIP2 for retrieving city and region ? Chris Angelico <rosuav@gmail.com> - 2013-07-13 02:47 +1000
          Re: GeoIP2 for retrieving city and region ? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-07-12 19:04 -0400
            Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-13 08:48 +0300
              Re: GeoIP2 for retrieving city and region ? Chris Angelico <rosuav@gmail.com> - 2013-07-13 15:53 +1000
                Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-13 09:07 +0300
                Re: GeoIP2 for retrieving city and region ? Chris Angelico <rosuav@gmail.com> - 2013-07-13 16:22 +1000
                Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-13 09:28 +0300
                Re: GeoIP2 for retrieving city and region ? Lele Gaifax <lele@metapensiero.it> - 2013-07-13 10:12 +0200
                Re: GeoIP2 for retrieving city and region ? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-07-13 12:48 -0400
                Re: GeoIP2 for retrieving city and region ? Roy Smith <roy@panix.com> - 2013-07-13 12:59 -0400
                Re: GeoIP2 for retrieving city and region ? Wayne Werner <wayne@waynewerner.com> - 2013-07-13 13:35 -0500
          Re: GeoIP2 for retrieving city and region ? Chris Angelico <rosuav@gmail.com> - 2013-07-13 10:36 +1000
          Re: GeoIP2 for retrieving city and region ? Joel Goldstick <joel.goldstick@gmail.com> - 2013-07-12 19:42 -0400
        Re: GeoIP2 for retrieving city and region ? Ian Kelly <ian.g.kelly@gmail.com> - 2013-07-12 11:19 -0600
        Re: GeoIP2 for retrieving city and region ? Terry Reedy <tjreedy@udel.edu> - 2013-07-12 18:07 -0400
        Re: GeoIP2 for retrieving city and region ? MRAB <python@mrabarnett.plus.com> - 2013-07-12 23:07 +0100
          Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-13 08:32 +0300
            Re: GeoIP2 for retrieving city and region ? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-07-13 12:54 -0400
              Re: GeoIP2 for retrieving city and region ? Roy Smith <roy@panix.com> - 2013-07-13 13:09 -0400
              Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-13 20:43 +0300
                Re: GeoIP2 for retrieving city and region ? Roy Smith <roy@panix.com> - 2013-07-13 14:19 -0400
                Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-13 21:23 +0300
                Re: GeoIP2 for retrieving city and region ? Roy Smith <roy@panix.com> - 2013-07-13 14:30 -0400
                Re: GeoIP2 for retrieving city and region ? Michael Torrie <torriem@gmail.com> - 2013-07-13 16:57 -0600
                Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-16 22:43 +0300
                Re: GeoIP2 for retrieving city and region ? Joel Goldstick <joel.goldstick@gmail.com> - 2013-07-16 15:51 -0400
                Re: GeoIP2 for retrieving city and region ? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-07-16 20:51 -0400
                Re: GeoIP2 for retrieving city and region ? Chris Angelico <rosuav@gmail.com> - 2013-07-17 10:58 +1000
                Re: GeoIP2 for retrieving city and region ? Tim Chase <python.list@tim.thechases.com> - 2013-07-14 13:32 -0500
                Re: GeoIP2 for retrieving city and region ? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-07-13 14:21 -0400
                Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-13 21:28 +0300
                Re: GeoIP2 for retrieving city and region ? Chris Angelico <rosuav@gmail.com> - 2013-07-14 09:12 +1000
                Re: GeoIP2 for retrieving city and region ? Wayne Werner <wayne@waynewerner.com> - 2013-07-13 13:46 -0500
                Re: GeoIP2 for retrieving city and region ? Benjamin Kaplan <benjamin.kaplan@case.edu> - 2013-07-13 11:17 -0700
                Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-15 16:25 +0300
                Re: GeoIP2 for retrieving city and region ? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-07-15 20:34 -0400
                Re: GeoIP2 for retrieving city and region ? Michael Torrie <torriem@gmail.com> - 2013-07-15 20:48 -0600
                Re: GeoIP2 for retrieving city and region ? alex23 <wuwei23@gmail.com> - 2013-07-17 10:07 +1000
            Re: GeoIP2 for retrieving city and region ? Chris Angelico <rosuav@gmail.com> - 2013-07-14 03:03 +1000
        Re: GeoIP2 for retrieving city and region ? Michael Torrie <torriem@gmail.com> - 2013-07-12 16:15 -0600
      Re: GeoIP2 for retrieving city and region ? Joel Goldstick <joel.goldstick@gmail.com> - 2013-07-12 12:24 -0400
    Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-14 08:18 +0300
      Re: GeoIP2 for retrieving city and region ? Chris Angelico <rosuav@gmail.com> - 2013-07-14 15:24 +1000
        Re: GeoIP2 for retrieving city and region ? Νικόλας <nikos@superhost.gr> - 2013-07-14 10:51 +0300
  Re: GeoIP2 for retrieving city and region ? Chris Angelico <rosuav@gmail.com> - 2013-07-13 02:41 +1000

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