Asia : China Canton River : Whampao to Canton (Eastern part)
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Depths shown by soundings
From Chinese imperial maritime customs surveys to 1907
Polygon: 23.125,113.3541667 23.125,113.4291667 23.01666667,113.4291667 23.01666667,113.3541667 23.125,113.3541667
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Special Collections & Archives, UC San Diego, La Jolla, 92093-0175 (https://lib.ucsd.edu/sca)
3rd edition, No. 2532
Public Domain (US)
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