GeoIP database global accuracy

[srilumpa]

Hi,

I've read on MaxMind's website that the accuracy of their database decrease at the rate of about 1.5% per month and I was wondering if their is a way to evaluate the overall accuracy of the database once the GeoIP object is created.

If the creation date of the .dat file is available, it could be interesting to access it and read it through th GeoIP model, or even having access to a method, say #accuracy, returning directly the evaluated accuracy:

def accuracy
  0.985**((Time.now - database_publication_date)/2592000).to_i
end