Something very similar has been done years ago: http://www.city-data.com/accidents/acc-Chicago-Illinois.html http://www.city-data.com/accidents/acc-Chicago-Illi

Something very similar has been done years ago: http://www.city-data.com/accidents/acc-Chicago-Illinois.html http://www.city-data.com/accidents/acc-Chicago-Illinois.html. Per-city mapping using Google Maps with additional info and Google street map when clicking on each marker.