Topic: [Closed] Finding zip codes in specific radius

What I want to do is to find zip codes by input zip code and radius (mile/km).

My rails application use Rails 3 with MongoId.
I've searching for the right gem or plugin, but I can't find it.

Thanks, any suggestion would be apreciated.

EDIT: I make my own code for that.

Last edited by hasan.iskandar (2011-04-26 09:14:16)