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31. Impervious surface area for Southeast Pennsylvania, 1985

1985. Toby Carlson, Penn State University. Impervious surface area for Pennsylvania was estimated from Thematic Mapper data using algorithms developed by Dr. Toby Carlson. The Value attribut...

32. Impervious surface area for Southeast Pennsylvania, 2000

2000. Toby Carlson, Penn State University. Impervious surface area for Pennsylvania was estimated from Thematic Mapper data using algorithms developed by Dr. Toby Carlson. The Value attribut...

33. Impervious surface area for Southwest Pennsylvania, 1985

1985. Toby Carlson, Penn State University. Impervious surface area for Pennsylvania was estimated from Thematic Mapper data using algorithms developed by Dr. Toby Carlson. The Value attribut...

34. Inactive Railroads: Pennsylvania

1996. Environmental Resources Research Institute. Location of inactive rail lines in Pennsylvania, digitized from 1:24,000 USGS topographic maps on a stable mylar base.

35. Infrastructure Report Geodatabase - Impacted State forest roads as of December 2012: Pennsylvania

2014. This data represents primarily State Forest managed roads impacted by shale gas development as of 12/31/2012. This data was based on the best avail...

36. Interstate Highway Exits: Pennsylvania

2018. Pennsylvania Department of Transportation, Bureau of Planning and Research, Geographic Information Division. point locations of Pennsylvania interstate highway exits.

37. Interstate Mile Markers: Pennsylvania

2018. Pennsylvania Department of Transportation, Bureau of Planning and Research, Geographic Information Division. point locations of Pennsylvania Interstate mile markers.

38. Local Roads: Pennsylvania

2018. Pennsylvania Department of Transportation, Bureau of Planning and Research, Geographic Information Division. Public roads within Pennsylvania. This file includes all identified public roads not maintained by the PA Dept. of Transportation.

39. PAMAP Program - Railroad Lines: Pennsylvania

2007. PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey. This dataset consists of railroad lines aggregated by the PAMAP Program from data supplied by various Pennsylvania county governments. Additional i...

40. PAMAP Program - Roads: Pennsylvania

2007. PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey. This dataset consists of road centerlines aggregated by the PAMAP Program from data supplied by various Pennsylvania county governments. Additional...