This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Puertoprincesa chart .jpeg Scanned image of US Coast Geodetic Survey Manila Office nautical chart Puerto Princesa Paragua Palawan Philippines From the Image Archives of the ncd noaa gov htm Historical Map Chart Collection of Coast Survey Ocean Service States government Converted from MrSID to JPEG format for upload to Commons