Reverse Geocoding Without Web Access

Question

I am working on an application where one of the requirements is that I be able to perform realtime reverse geocoding operations based on GPS data. In particular, I must be

Answer 1

You can get data for the entire united states from open street map You could then extract the data you need such as city or state locations into what ever format works best for your application. Note although data quality is good it isn't guaranteed to be completely accurate so if you need complete accuracy you may have to look somewhere else.