"Engraved Dec. 1910 by U.S.G.S.", "Surveyed in 1885 and 1906-1909 in cooperation with the states of Pennsylvania and Maryland.", Datum is mean sea level., Gettysburg, Fairfield, Emmitsburg, and Taneytown atlas sheets combined in this map., and Relief shown by contours and spot heights. Contour interval 20 feet.
"Henry Gannett, Chief Topographer. H.M. Wilson, Chief Geographer in charge. Triangulation by ... and S.S. Gannett. Topography by Geol. Survey of New Jersey, City of Philadelphia, Frank Sutton ... and Robert Muldrow.", "Surveyed in 1894.", and Relief shown by contours and spot heights.
Publisher:
U.S. Geological Survey,
Subject (Geographic):
Philadelphia Metropolitan Area (Pa.)--Maps
Subject (Name):
Gannett, Henry, 1846-1914, Gannett, Samuel S. (Sameul Stinson), 1861-1939, Geological Survey of New Jersey, Muldrow, Robert, Sutton, Frank, and Wilson, Herbert M. (Herbert Michael), 1860-1920
"Henry Gannett, Chief Topographer. H.M. Wilson, Chief Geographer in charge. Triangulation by ... and S.S. Gannett. Topography by Geol. Survey of New Jersey, City of Philadelphia, Frank Sutton ... and Robert Muldrow.", "Surveyed in 1894.", and Relief shown by contours and spot heights.
Publisher:
U.S. Geological Survey,
Subject (Geographic):
Philadelphia Metropolitan Area (Pa.)--Maps
Subject (Name):
Gannett, Henry, 1846-1914, Gannett, Samuel S. (Sameul Stinson), 1861-1939, Geological Survey of New Jersey, Muldrow, Robert, Sutton, Frank, and Wilson, Herbert M. (Herbert Michael), 1860-1920
"Surveyed in 1903; additional areas from surveys made in 1900 and 1901 by U.S. Geological Survey". and Relief shown by contours; contour interval 200 feet.
Publisher:
U.S.G.S.,
Subject (Geographic):
Seward Peninsula (Alaska)--Maps
Subject (Name):
Brooks, Alfred H. (Alfred Hulse), 1871-1924 and Witherspoon, D. C
"Surveyed in 1898, 1914,1915,1916, and 1919.", Key map of surveyors' areas of responsiblity in margin., and Relief shown by contours, land forms and spot heights.
Publisher:
Geological Survey,
Subject (Geographic):
Kuskokwim Bay Region (Alaska)--Maps and Kuskokwim River Region (Alaska)--Maps
Subject (Name):
Brooks, Alfred H. (Alfred Hulse), 1871-1924, Maddren, A. G, Post, W. S, and Sargent, Rufus Harvey, b. 1875