Prepared and published by the National Geospatial-Intelligence Agency. Depths shown by isolines and soundings. Relief shown by contours and spot heights. "From Chilean and U.S. charts to 1989." "Copyright 2006 by the United States Government. No copyright claimed under Title 17 U.S.C." "Soundings in meters." Includes compilation diagram. Map no.22264. This map is part of a collection of scanned and georeferenced nautical charts produced by the National Geospatial-Intelligence Agency (NGA).