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ArcGIS Links
Planning Links
American Planning Association
Urban Affairs
Cyburbia (urban planning portal)
Critical Planning (Journal)
HUD Empowerment Zone Program
Community Development Links
Community Development Society
HUD Office of Community Planning and Development
Living Cities
Community Development effort by the Commonwealth of PA
Philadelphia Association of Community Development Corporations
Census Links
Census Home
Census 2000 Demographic Data
Census Geography Shapefiles
Spatial and Demographic Data Links
Inter-University Consortium for Political and Social Research
Geography Network
TIGER files (U.S. Census)
National Archives
Bureau of Transportation Services U.S. Street Layer Downloads
Pennsylvania Spatial Data Association