[atlas] New: Atlas resource coverage (and more maps!) beta

Might be nice to have some summary statistics, e.g.: According to today's data, Atlas probes are present in...
- 1.6% of IPv4 ASNs
- 4.2% of IPv6 ASNs
- 0.17% of IPv4 prefixes (covering 45% of the address space)
- 2.3% of IPv6 prefixes 
- 91 countries


On Dec 15, 2011, at 6:33 AM, Robert Kisteleki wrote:

> Dear Atlas Users,
> 
> Today we enabled another interesting feature (in beta mode, for now):
> details about what networks Atlas covers at the moment. This feature lists
> IPv4/IPv6 prefixes, ASNs and countries. This information will also be used
> for User Defined Measurements, in order to filter vantage points to specific
> networks or locations.
> 
> You can access this at https://atlas.ripe.net/atlas/coverage.html
> 
> Background information:
> * the prefixes and ASNs are looked up in RIS, based on the address of the probe
> * the country code is looked up in OpenStreetMaps based on the probe geolocation
> 
> We are aware that in some cases the lookup has a surprising result. One
> example is 6to4: for IPv6 related ASNs the prefix is 2002::/16 but the ASN
> can be misleading. We'll most likely stop looking up ASNs for 6to4 (and
> Teredo) prefixes. If you see anomalies *not* related to this, you can let us
> know at atlas-dev at ripe.net
> 
> Regards,
> Robert, for the whole team
>