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- Pennsylvania Department of Environmental Protection34
- U.S. Department of Commerce, U.S. Census Bureau, Geography Division33
- Pennsylvania Fish and Boat Commission32
- Environmental Resources Research Institute29
- Allegheny County Division of Computer Services Geographic Information Systems Group27
- Delaware River Basin Commission (DRBC)27
- U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners (see dataset specific metadata under Data_Set_Credit for details).22
- United States Geological Survey (USGS)22
- U.S. Geological Survey15
- Angela E. England, Bat Conservation International, Inc.14
- Pennsylvania Department of Transportation, Bureau of Planning and Research, Cartographic Information Division14
- SRBC12
- The Pennsylvania State University11
- U.S. Fish and Wildlife Service10
- Pennsylvania Department of Transportation, Bureau of Planning and Research, Geographic Information Division9
- Pennsylvania Game Commission9
- Dr. Toby Carlson, Penn State University8
- City of Philadelphia7
- PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey7
- Steve Rosenberry7