It's not available, but no reason it couldn't be. Well, other than that it's ugly. I wrote this, made a few tweaks, and left it. Honestly I doubt I would do it this way again.Is any of your code available? I'm using the geoip database from MaxMind[0] and it's showing the same distribution as some of your images.
I am using the maxmind stuff as well, at first. If that fails it tries "Community Geotarget IP Project" at http://hostip.info/Which GeoIP database are you using to identify nodes in Africa?
--B