From the Home Page
The maps and data displayed on this site have been prepared for the inventory of real property found within the neighborhoods of Philadelphia. Users of this site are hereby notified that the aforementioned public primary information sources should be consulted for verification of the information contained on the maps and in the databases presented on this web site. Neither the University of Pennsylvania, the City of Philadelphia, the Cartographic Modeling Laboratory, nor their collaborators assume any legal responsibility for the information displayed on maps or associated tabular data presented on this web site.
From Open Data Philly
NeighborhoodBase is an online application with mapping and analysis tools that gives users access to over 183 neighborhood data elements (ex. land-use, demographics, real-estate history) organized by boundaries such as zip codes, census tracts, and block groups. Users can also create their own geographic boundaries as part of "defining your own neighborhood" and produce aggregated statistics for that area. Analysis tools include tables, summary statistics, charts, trend lines, and neighborhood reports. Developed by the University of Pennsylvania's Cartographic Modeling Lab (CML), the application is designed to support broad urban policy analysis and evaluation of Philadelphia neighborhoods. Data is drawn from the U.S. Census Bureau and other agencies, including the Department of Licenses and Inspections, the Philadelphia Mayor's Office, the Philadelphia City Planning Commission, and the city's utilities agencies.