Maps from various collections that focus on the geographic representation of Western Pennsylvania, which include geodetic and topographic survey maps, flood commission maps, property ownership maps, and many others.
What's in the entire collection?
Maps selected for scanning and representation online were culled from the following:
City of Pittsburgh Geodetic and Topographic Survey Maps, 1923-1961
Darlington Digital Library Maps
Flood Commission of Pittsburgh, Pennsylvania, 1912
G. M. Hopkins Company Maps, 1872-1940
Warrantee Atlas of Allegheny County, Pennsylvania, 1914