[atlas] How to deal with inaccurate geocoding of probes

Hi Klaus,

On 30/12/15 15:39, Klaus Darilion wrote:
> Hi!
>
> Inspired by
> https://perso.telecom-paristech.fr/~drossi/index.php?n=Dataset.Anycast I
> wanted to detect my Anycast locations using the Atlas probes.
>
> The problem is, that my results are only as accurate as the geocoding of
> the Atlas probes.
>
> For example probe #19273 is reported to be somewhere in Kansas.

I guess we're not in Kansas anymore ;)

>   Bit the
> probe is only 5ms away from my LAX server and also traceroute indicates
> the probe is in LAX (traceroute to 63.84.150.1).
>
> So, now I am seeking some advice how to handle such problems. Is there
> some tag that indicates "verified location"? Any other ideas?

This particular probe has the tag: Auto GeoIP Country which means that 
we could not determine the location any more accurately than at country 
level.

Originally, this probe was located somewhere in Canada but we noticed it 
was not there anymore so we automatically moved it closer to where we 
think it really is. Unfortunately, we could not be more precise than 
country level which is why we tagged it this way.

We are constantly working on ways to improve the automatic geotagging of 
probes but the best way is still for probe hosts to keep the location of 
the probe up to date.

Regards,

Johan ter Beest
RIPE Atlas team
>
> Thanks
> Klaus
>
>
>