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U.S. Geological Survey
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Pennsylvania Spatial Data Access (PASDA)
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Search Results
1. National Land Cover Database 2001 - Imperviousness Layer - Southeast
2003. U.S. Geological Survey. The National Land Cover Database 2001 for mapping zone 54 was produced through a cooperative project conducted by the Multi-Resolution Land Charact...
2. National Land Cover Database 2001 - Tree Canopy Layer - Southeast
2003. U.S. Geological Survey. The National Land Cover Database 2001 tree canopy layer for mapping zone 54 was produced through a cooperative project conducted by the Multi-Resol...
3. National Land Cover Database 2001 - Land Cover Layer - Southeast
2003. U.S. Geological Survey. The National Land Cover Database 2001 land cover layer for mapping zone 54 was produced through a cooperative project conducted by the Multi-Resolu...
4. United States Concise - Geographic Names Information System (GNIS)
2009. U.S. Geological Survey. The Geographic Names Information System (GNIS) is the Federal standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS f...
5. United States Historic Features - Geographic Names Information System (GNIS)
2009. U.S. Geological Survey. The Geographic Names Information System (GNIS) is the Federal standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS f...
6. United States Populated Places - Geographic Names Information System (GNIS)
2009. U.S. Geological Survey. The Geographic Names Information System (GNIS) is the Federal standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS f...
7. Zebra Mussel Distribution: United States
2008. U.S. Geological Survey. The concern caused by the explosive spread of the zebra mussel, (Dreissena polymorpha), within the United States resulted in passage of the Nonindi...