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Allegheny National Forest ELT Landform: Pennsylvania penn-state

2011. U S Department of Agriculture. The aim of landscape ecosystem classification and mapping is to distinguish appropritely sized ecosystems - useful and functional land units that d...


Allegheny National Forest Major Stream: Pennsylvania penn-state

2006. U S Department of Agriculture. This dataset contains the boundary lines of the USGS (United States Geological Survey) 7.5 minute quadrangles covering the ANF (Allegheny National ...