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1996. Federal Emergency Management Agency. Q3 flood data for New York, 1996. The Q3 Flood Data are derived from the Flood Insurance Rate Maps (FIRMs) published by the Federal Emergency Manag... Federal Emergency Management Agency.
1790. Harvard Map Collection, Harvard College Library, De Witt, Simeon, 1756-1834., O'Callaghan, E. B. (Edmund Bailey), 1797-1880., Pease, Richard H., 1813-1869., and Weed, Parsons & Co. This layer is a georeferenced raster image of the historic paper map entitled: Map of the head waters of the rivers Susquehanna & Delaware embracin... Harvard Map Collection, Harvard College Library.