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8. OpenDataPhilly

Collections collections
OpenDataPhilly is a catalog of open data in the Philadelphia region. In addition to being the official open data repository for the City, it includ...

9. Penn State Rare Maps

Collections collections pennsylvania-state-university
1490. The Donald W. Hamer Center for Maps and Geospatial Information digital map drawer contains the subset of our physical map collection that has been ...

10. Sanborn Maps: Pennsylvania, 1884-1938

Collections collections pennsylvania-state-university
1884. The Sanborn Map Company, the best known of the U.S. fire-insurance map producers, has made maps since 1867. The fire insurance maps produced by San...