Category:USGS topographic maps of Pennsylvania

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English: This category is exclusively for Large Public Domain digital images that are sourced or derivative of section or quadrant maps published in the public domain by the United States Geological Survey.
  • Subcategories and maps in this schema should conform in naming to the USGS MRC code identification numbering over a one degree by one degree section.
  • The schema is an identification number, followed by an eight (rows, letters) by eight (cols, numbers) matrix coded A1 ... G8 (Organized: Lower East corner to Upper West corner)