in-addr survey?

[Patrick Greenwell <patrick () cybernothing org>]

I'm attempting to convince "the powers that be" that attempting to use
reverse lookups to determine geographic locale is extremely
inaccurate. One of the reasons among the many this is the case (I
believe) is that significant portion of admins do not have properly configured
in-addr. Has anyone done this sort of survey(Bill Manning?) If so,
anyone have a pointer handy?

Thanks.