U.S. Geological Survey. Relief shown by contours and spot heights. Contour interval 20 feet. Gettysburg, Fairfield, Emmitsburg, and Taneytown atlas sheets combined in this map. Surveyed in 1885 and 1906-1909 in cooperation with the states of Pennsylvania and Maryland. Engraved Dec. 1910 by U.S.G.S. Datum is mean sea level.
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