Well fellow programmers,
I got myself in a situation.
I am currently developing an API for a taxi application. The taxi want's to show advertisements from the current area. Now i need to specify in the Admin panel what the banner image is and the main location. Aswell as a radius in KM to show this ad aswell.
My question. Is there a simple API which i can fill in my current location and get all nearby citynames within the radius i provide aswell?
i am looking for something like this : http://www.travelmath.com/cities-within/10+km/of/Rotterdam,+Netherlands but then an API with JSON return.