The Ancestry Library Edition collection has approximately 4,000 databases including key collections such as U.S. Federal Census images and name indexes from 1790 to 1930; the Map Center containing more than 1,000 historical maps.
Changes to the names of certain streets, alleys, and courts were first effected by an ordinance dated September 1, 1858. A provision of this ordinance was an alphabetical index of former names, together with the location of the street and the new name given to it. By an ordinance of February 23, 1897 names of intermediate streets were indexed by old name, location and new name.
Housing profiles of Philadelphia neighborhoods.
86 neighborhood planning surveys prepared and published by the Philadelphia City Planning Commission between 1946 and 1990. These reports contain descriptions of current conditions of housing stock; population trends; property turnover; public transportation; community activity. Recommendations are made for future action.
The Geohistory Network includes scanned images of historic fire insurance atlases and directories for Philadelphia. It is a pilot project of the Philadelphia Area Consortium of Special Collections Libraries (PACSCL) to develop a web-based repository of geographically organized historical information about Philadelphia, its geography, its buildings, and its people.
PAB incorporates data from the collections of the AthenC&um of Philadelphia, University of Pennsylvania Architectural Archives, the Philadelphia Historical Commission, the Pennsylvania Historical and Museum Commission, and more than 25 other area repositories.
Photographic images of Philadelphia from the Philadelphia City Archives, which holds approximately 2 million photos dating from the late 1800s, as well as the Athenaeum of Philadelphia.
Fire Insurance Maps for Pennsylvania for the early parts of the twentieth century.
The Social Explorer produces maps and reports of US Census Tract level data from 1940-2000. Using high quality maps and data, they make available the full contents of the tract data for the United States for the full period. The data can also be exported as excel spreadsheets for easy reuse.

