Status of vertical control, United States : October 1, 1985 / United States Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service
Scale approximately 1:20,000,000. Not 1:5,000,000 ; Albers equal area projection, standard parallels 29 1/2° and 45 1/2° (W 124°45ʹ--W 67°00ʹ/N 49°22ʹ--N 24°30ʹ).
Note
At head of title: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, national geodetic network, Washington, D.C. Collective title: Status of vertical control, national geodetic network, United States, 1:5,000,000. "Base map by United States Geological Survey." Shipping list number: 86-43-P. Insets: Alaska -- Hawaii -- Canal Zone -- Puerto Rico and Virgin Islands.