6sqft previously reported on the “time machine” map function that allowed users to navigate overlaid maps from 1600 to the present to see what used to occupy our favorite present-day places. Now, the New York Public Library has released the Space/Time Directory, a “digital time-travel service” that puts the library’s map collection–including more than 8,000 maps and 40,000 geo-referenced photos–to work along with geospatial tools to allow users to see the city’s development happen over more than a century, all in one convenient place. Hyperallergic reports that the project, supported by a grant from the Knight Foundation, plots 5,000 digitized street maps across the five boroughs, organized by decade from 1850 to 1950.

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