- Creation Date
- Date Issued
From surveys of the Hydrographic Division, M.S.A., Japan to 1967
Inset: Oigawa Ko; Ugusu Ko
Relief shown by contours; depths shown by soundings
Polygon: 35.35,138.1933333 35.35,138.95 34.45666667,138.95 34.45666667,138.1933333 35.35,138.1933333
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- Local Attribution
Special Collections & Archives, UC San Diego, La Jolla, 92093-0175 (https://lib.ucsd.edu/sca)
3rd edition, No. 97159
Public Domain (US)
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