Data Sources

ACLED Data (for conflicts)
Allentown, PA: Look into the Past (1938)
Allentown, PA: Look into the Past (1978)
Allentown’s Open Data portal
ArcGIS Wayback Imagery
Bethlehem Data is coming…
Bureau of Transportation Statistics
Data.Gov
ESRI’s Living Atlas – Browse(Great for finding map layers)
ESRI’s Open Data site
ESRI’s Remote Sensing Imagery
GapMinder.Com
Georeferenced Maps 
GIS Data for Public Health
Historical Aerial Photos of PA
Kaggle.com
Lehigh Valley Planning Commission data site
Lehigh’s Datasets for the Social Sciences
Open Data Network
Open Data PA
PA Dept of Conservation & Natural Resources Survey Library
PA Historical and Museum Commission
Pennsylvania Spatial DataAccess
Reading’s Open Data portal
The National Map
The Nature Conservancy
Tiger Shapefiles