[…] make urban history accessible through the kinds of interactive, location-aware tools used to navigate modern cityscapes. It will provide a way for scholars, students, and enthusiasts to explore New York City across time periods, and to add their own knowledge and expertise.
In other words, given a New York City address or landmark, the site will allow you to peel back the years and inspect all maps, records or any other historical data found from a simple online tool. The project is currently looking for Data Partners to provide data, researchers and advisors to provide new data, and developers and data wranglers to make sense of it all.
via Fast Company