Lingayen Gulf, Philippines 1901

Relief shown by contours, spot heights, and hachures. Depths shown by gradient tints, soundings, and isolines.; "The soundings and heights are in feet."; Includes text, seal, and tables.; "No. 4241" -- upper left margin.; "Aids to navigation corrected for information received to May 22 1901" -- stamped.; "Surveyed in 1901."; "Published at Washington, D.C. August, 1907 ..."; Triangulation, topography, and hydrography executed in 1905 and 1906.Grayscale;1:10,00