[gspyrou]

Try using Google maps reverse geocoding https://developers.google.com/maps/documentation/geocoding/#...

[Devlin_Donnelly]

Thanks for the idea, but apparently google only allows the use this service in conjunction with Google maps, so it won't work for my project.

Maybe there are some open source map databases of GPS coordinates mapped to political/municipal localities?

[bartonfink]

MapQuest offers a geocoding service which doesn't tie you to MapQuest's maps the way Google does. It's free up to some usage amount (I think it's 5k requests a day). You can see more here:

http://www.mapquestapi.com/geocoding/

[Devlin_Donnelly]

Thanks it looks like this one might work for my needs.