I have been a huge fan of Ben Wellington for a few years now. If you are not familiar with him he is a "data storyteller" who uses open data to get people interested in data science. His maps of parking violations in New York helped change policy and reduced incorrect ticketing. Check out this video to see him in action.
https://www.ted.com/talks/ben_wellington_how_we_found_the_worst_place_to_park_in_new_york_city_using_big_data/footnotes?quote=588