Relief shown by contours. Depth shown by soundings in feet. "Surveyed in 1887. Resurveyed in 1899." "Revision of 1901." New Jersey Geological Survey. Topographic Name Sheet. Amboy (1922) Alternate title: Amboy sheet. "Surveyed in 1887. Resurveyed in 1920". Relief shown by contours. Depth shown by soundings in feet.