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1962. Harvard Map Collection, Harvard College Library and Geological Survey (U.S.). This layer is a georeferenced raster image of the historic, topographic paper map entitled: Pittsburgh and vicinity, Pennsylvania, mapped, edited, ... Harvard Map Collection, Harvard College Library.
1903. Harvard Map Collection, Harvard College Library, Geological Survey (U.S.), United States. Dept. of the Interior., Pennsylvania. Bureau of Topographic and Geologic Survey., and United States. Army. Corps of Engineers. This layer is a georeferenced raster image of the historic, topographic paper map entitled: Pennsylvania, Pittsburgh quadrangle, Department of the ... Harvard Map Collection, Harvard College Library.
1996. Federal Emergency Management Agency. Q3 flood data for Ohio, 1996. The Q3 Flood Data are derived from the Flood Insurance Rate Maps (FIRMs) published by the Federal Emergency Managemen... Federal Emergency Management Agency.