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Author
U.S. Geologic Survey; Pennsylvania Bureau of Topographic and Geologic Survey
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Subject
Imagery and Base Maps
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Institution
Penn State
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Place
Pennsylvania, United States
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Search Results
1. Digital Orthophoto Quarter Quadrangle images for Pennsylvania
1993. U.S. Geologic Survey; Pennsylvania Bureau of Topographic and Geologic Survey. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a ...
2. Digital Orthophoto Quarter Quadrangle images for Pennsylvania
1999. U.S. Geologic Survey; Pennsylvania Bureau of Topographic and Geologic Survey. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a ...