from a survey by U.S.S. Bowditch in 1942 with additions from other sources to 1943 ; Prepared and published by the Defense Mapping Agency Hydrographic/Topographic Center. Depths shown by isolines and soundings. Relief shown by contours. "Soundings in fathoms." Includes tidal information. Map no.22533. This map is part of a collection of scanned and georeferenced nautical charts produced by the National Geospatial-Intelligence Agency (NGA). United States. Defense Mapping Agency. (1985). South Pacific Ocean, Ecuador, Archipélago de Colón (Galapagos Islands), western approach to Bahía Isabel (Raster Image). LandInfo. Available at: https://purl.stanford.edu/bn467nb8822 This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Land Info (Firm)
National Geospatial-Intelligence Agency Nautical Charts