The landscape of New York City has always been in constant flux. To keep track of the city as it changes, the New York Public library has been amassing thousands of historical street atlases over decades, "making those lost places findable." The website invites motivated amateurs to take the digitized, computer-generated amalgams of these old maps, and "test drive" them. In other words, readers are invited to walk around New York and take stock of what computers have generated, making sure that the models are accurate. The process is based on a consensus model: if more than three people agree that the generated map is accurate, then it is recorded as such. Hence, the New York Public Library plans to digitally generate and virtually crowd source a brand new map of Old New York.