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1. National Land Cover Database 2001 - Tree Canopy Layer - Pennsylvania and Northeast

2003. U.S. Geological Survey. The National Land Cover Database 2001 tree canopy layer for mapping zone 60 was produced through a cooperative project conducted by the Multi-Resol...

2. National Land Cover Database 2001 - Imperviousness Layer - Pennsylvania and Northeast

2003. U.S. Geological Survey. The National Land Cover Database 2001 for mapping zone 60 was produced through a cooperative project conducted by the Multi-Resolution Land Charact...

3. National Land Cover Database 2001 - Imperviousness Layer - Western Pennsylvania and Ohio

2003. U.S. Geological Survey. The National Land Cover Database 2001 for mapping zone 47 was produced through a cooperative project conducted by the Multi-Resolution Land Charact...

4. National Land Cover Database 2001 - Land Cover Layer - Pennsylvania and Northeast

2003. U.S. Geological Survey. The National Land Cover Database 2001 land cover layer for mapping zone 60 was produced through a cooperative project conducted by the Multi-Resolu...

5. National Land Cover Database 2001 - Land Cover Layer - Western Pennsylvania and Ohio

2003. U.S. Geological Survey. The National Land Cover Database 2001 land cover layer for mapping zone 47 was produced through a cooperative project conducted by the Multi-Resolu...

6. National Land Cover Database 2001 - Tree Canopy Layer - Western Pennsylvania and Ohio

2004. U.S. Geological Survey. The National Land Cover Database 2001 tree canopy layer for mapping zone 47 was produced through a cooperative project conducted by the Multi-Resol...

7. Topographic Maps (DRG) for Pennsylvania 1:24,000 - Albers - cropped collars

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map with cropped collars in Albers projection.

8. Topographic Maps (DRG) for Pennsylvania 1:24,000 - UTM

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

9. Topographic Maps (DRG) for Pennsylvania 1:24,000 - UTM - cropped collars

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map with cropped collars, georeferenced to the UTM grid.

10. Topographic Maps (DRG) for Pennsylvania 1:24,000 - UTM - NAD 1983

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...