The Free Library of Philadelphia Map Viewer uses the Google Maps API to permit users to stance as well as explore historical maps of the city.
The map viewer includes viii archive maps of Philadelphia dating dorsum to 1843. You tin mail away overlay whatsoever of the maps on superlative of the Google Map interface past times making a alternative from the map sidebar. It is likewise possible to add together a layer to the map that shows historical photographs from the Free Library collection.
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