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U.S. Geological Survey
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Penn State
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2011
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1. USGS Geopdfs for District of Columbia
2011. U.S. Geological Survey. Layered GeoPDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydro...
2. USGS Geopdfs for Pennsylvania 30 x 60 Minute
2011. U.S. Geological Survey. GeoPDF 30 x 60 Minute Quadrangle Map for Pennsylvania.
3. USGS High Resolution Orthoimagery for Harrisburg, Pennsylvania
2011. U.S. Geological Survey. This data set consists of 0.3-meter pixel resolution (approximately 1-foot), natural color orthoimages covering the urban area footprint. An orthoi...
4. USGS High Resolution Orthoimagery for Harrisburg, Pennsylvania - Tile Index
2011. U.S. Geological Survey. TILE INDEX - 'This data set consists of 0.3-meter pixel resolution (approximately 1-foot), natural color orthoimages covering the urban area footpr...