Philadelphia and vicinity, Pennsylvania - New Jersey and Delaware.Geological Survey (U.S.)1902"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."Relief shown by contours and spot heights.cartographic