I'll add the obligatory tip of the hat to www.openstreetmap.org - it's community basis and the ease of use of it's editing tools make this kind of issue very ea

I'll add the obligatory tip of the hat to www.openstreetmap.org - it's community basis and the ease of use of it's editing tools make this kind of issue very easy for users to fix. And as a bonus, any edits you make to the data aren't owned and copyrighted by a large corporate, but are made available to everyone via a Creative Commons Licence (soon to be ODbL)