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- U.S. Department of Commerce6
- Allegheny County Division of Computer Services Geographic Information Systems Group3
- Pennsylvania. Dept. of Conservation and Natural Resources. Bureau of State Parks.3
- U.S. Geological Survey3
- Chester County GIS Department1
- Chester County Planning Commission1
- Choptank River Heritage Center (CRHC), 10219 River Landing Rd., Denton, Md 216291
- City of Philadelphia1
- City of Philadelphia - Fire Department1
- Environmental Resources Research Institute1
- Environmental Systems Research Institute Data Set,1
- Erie National Wildlife Refuge1
- Joseph A. Bishop1
- Juniata County1
- Lynn Gaines1
- National Atlas of the United States1
- PA Dept. of Environmental Protection1
- PADEP Geospatial Data Center1
- Pennsylvania Department of Transportation, Bureau of Planning and Research, Cartographic Information Division1
- Pennsylvania Historical and Museum Commission1