Prepared and published by the National Imagery and Mapping Agency. Depths shown by isolines and soundings. Relief shown by contours and spot heights. "From surveys of the Hydrographic Institute of the Navy of Chile; photogrammetric update through 1982." "Copyright 1997 by the United States Government. No copyright claimed under Title 17 U.S.C." "Soundings in meters." Includes source data and tidal information. Components: Port of Talcahuano -- Ports of Lirquén and Penco. Map No.22311 This map is part of a collection of scanned and georeferenced nautical charts produced by the National Geospatial-Intelligence Agency (NGA). United States. National Imagery and Mapping Agency. (1997). Chile, Ports of Talcahuano, Lirquén, and Penco (Raster Image). LandInfo. Available at: https://purl.stanford.edu/zv501jw4136 This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.