Wikipedia killed the encyclopedia business, in print and online, as it's hard to make a revenue model work that involves paying people to create content when there are hordes of enthusiastic experts around the world willing to do the job for free. The business of mapping may be similarly doomed, as indicated by PublicEarth, a new wiki-style database of places launching Monday, and by the continued improvement in authoring tools at the crowdsourced mapping service OpenStreetMap. PublicEarth PublicEarth is an open database of places. Michael Rubin, who was an architect of Netflix , wanted to bring the same "element of delight" of connecting people to things they enjoy. Netflix did it for movies, and Public Earth is doing it for locations.