Stand anywhere in New York City and watch it peel back through time. Ratsy marks your exact spot while the streets, piers, and blocks around you shift, decade by decade. Drag the map to look around, and tap the crosshair to snap back to yourself.
Let the app use your location. The map centers on you automatically.
Swipe left / right (or tap the arrows) to flick between every old map that covers where you're standing — oldest first.
Open About the maps to browse the whole collection and fade any map against today.
Historical maps are georeferenced scans from David Rumsey, the Library of Congress & Map Warper, via OldMapsOnline & Allmaps. Present-day base map © OpenStreetMap & CARTO.
A Data Vandals experiment. Coverage is best in Manhattan and the older cores of the boroughs.