Aparri Anchorage, Philippines 1903

Relief shown by spot heights, hachures, and landform drawings. Depths shown by gradient tints, soundings, and isolines ; "Soundings in feet." ; Includes text, seal, and tables ; "No. 4260" -- upper left margin ; "Outer hydrography and triangulation and topography of coast, executed in 1902, Cagayan River from survey by U.S. Engineers in 1902." ; "February 1903."Color1:25,00