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To aid navigation, this map shows small islands, shoals and reefs, maritime routes for use during monsoons or at particular times of the year, bathymetry (sea depth), tide information, shipwrecks, compass roses and landmark mountains at the coasts.

Navigation map of the southern South China Sea, with bathymetry (sea depth), islands, shoals and reefs marked. There are four maritime routes to China marked, with notes on what months or monsoon season to use them. Inset map of Gulf of Thailand.

Navigation map of the southern South China Sea, with bathymetry (sea depth), islands, shoals and reefs marked. There are four maritime routes to China marked, with notes on what months or monsoon season to use them. Inset map of Gulf of Thailand.

The arrows on this map mark the direction of the seasonal monsoons experienced in the South China Sea and Philippine Sea during the late 18th century. Each arrow has a label indicating the month.

French text on the reverse of this map describes the religion, languages, crops, trade etc. of Aracam and Pegu (Myanmar), Siam (Thailand), Cambaja (Cambodia). The map is dedicated to the Dutch merchant Christophoro Thisio.

As was common in this era, this map mistakenly shows the bottom of Peninsula Malaya as a separate island. The map also features illustrations of ships and a sea monster. Text on the reverse describes the people, crops, geography of the region.

As was common in this era, this map mistakenly shows the bottom of Peninsula Malaya as a separate island. The map also features illustrations of ships and a sea monster. Latin text on the reverse describes the people, crops, geography of the region.