Other mapping ideas are already a reality with the popular Google Maps.
Extract from Wikipedia (http://en.wikipedia.org/wiki/Google_Maps)
❝ Google Maps (for a time named Google Local) is a basic web mapping service application and technology provided by Google, free… ❞
❝ It offers street maps, a route planner for traveling by foot, car, or public transport and an urban business locator for numerous countries around the world. ❞
Google Maps works on all computers that can access the world wide web, from Microsoft Windows, Mac OSX and Linux; a computer with a web browser. I want to maybe use Google maps in my project, the Google Maps API would come in useful for that purpose.
URL to Google Maps (http://maps.google.co.uk/)