I use the Google Maps Javascript api for geolocation. It takes a string and returns an array of places that match. Each place object includes a formatted address which I put in the search bar in place of what was initially typed.

Most geocoding APIs (Google: https://developers.google.com/maps/documentation/geocoding/) will normalize an address and give you data back about it.

I'm not 100% certain but I think this is the code you are looking for https://github.com/jendewalt/yumhacker/blob/master/lib/geoco...