WikiMapia is an editable interactive map with the stated goal of creating and maintaining a free, complete, multilingual, up-to-date map of the whole world. The Wikimapia Api is a system that allows users to receive data from the maps. Users can integrate Wikimapia Geo Data into their external application or web site. The API uses RESTful calls and responses are formatted in JSON. The API is still in beta, more features will be added soon such as roads, graphic tiles use, then adding information from mobile devices to Wikimapia DB.
Wikimapia is a web service that allows users to edit information on a world map in a wiki format. Users of the site can add places, edit them, and get the information previous users have entered. The info there is currently pretty sparse, but the service is rather new. The company also recently released a Wikimapia API that supports getting information from the web service.