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21. Eastern Brook Trout Joint Venture: Pennsylvania
2006. Eastern Brook Trout Joint Venture. The Eastern Brook Trout Joint Venture (EBTJV) is the nation's first pilot project under the National Fish Habitat Initiative, which directs locally...
22. Ecoregions United States (Bailey)
2004. USDA Forest Service. This map layer is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.S. Virgi...
23. Ecoregions United States (Omernik)
2003. U.S. Environmental Protection Agency. This map layer shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of Omernik...
24. Environmental Justice Areas 2005: Pennsylvania
2005. PA Dept. of Environmental Protection. Census tracts are small, relatively permanent statistical subdivisions of a county delineated by local participants as part of the U.S. Census Bure...
25. Environmental Justice Areas 2010: Pennsylvania
2010. PADEP Geospatial Data Center. This layer identifies 2010 Pennsylvania Census Tracts which meet the PADEP definition for Environmental Justice Areas by having a poverty rate of 2...
26. Environmental Sensitivity Index (ESI) Maps and Data - Hudson: Pennsylvania
2006. National Oceanic and Atmospheric Administration (NOAA), National OceanService, Office of Response and Restoration, Hazardous Materials Response. This data set contains vector lines and polygons representing data used in the creation of the Environmental Sensitivity Index (ESI) for the Hudson...
27. EPA Renewable Energy Sites: Pennsylvania
2008. U.S. Environmental Protection Agency, Office of Solid Waste and Emergency Response, Center for Program Analysis. The U.S. Environmental Protection Agency (EPA) Office of Solid Waste and Emergency Response (OSWER) Center for Program Analysis (OCPA) is encouragi...
28. Fifth map, or map of 1733 : [of the east coast of the United States].
1780. Scale not given; 1 map: color; 20 x 14 cm United States--History--18th century--Maps--Early works to 1800.
29. First map, or map of 1578 : [of the east coast of the United States] ; Second map, or map of 1620.
1780. Scale not given; 2 maps on 1 sheet: color; each 20 x 14 cm, sheet 25 x 34 cm United States--History--Colonial period, ca. 1600-1775--Maps--Early wo...
30. Gray's new map of the United States
9999. Gray, Frank A. Scale 1:7,603,200.; 1 map; 41 x 68 cm United States--Maps.