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51. TIGER/Line Shapefile, 2009, state, Pennsylvania, Military Installation State-based Shapefile

2009. U.S. Department of Commerce, U.S. Census Bureau, Geography Division. The TIGER/Line Shapefiles are an extract of selected geographic and cartographic information from the Census MAF/TIGER database. The Census MAF/TIG...

52. United States Biomass Resource Assessment

2009. Anelia Milbrandt. Biomass resource potential for the lower 48 states of the United States of America.

53. 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...

54. 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...

55. 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...

56. Unpaved Roads: Pennsylvania, 2009

2009. PA Department of Environmental Protection : GDC. Unpaved roads layer for Pennsylvania created by the Bureau of Watershed Managment, Conservation Districts And Nutrient Management Division.