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This map of the Madura Strait between Java and Madura is designed to aid navigation: bathymetry (water depth), lighthouses, shoals and reefs, rocks and mud, anchor points, and landmark mountains are all marked. Text describes the tidal conditions.

Five maps of bays of Java, including bathymetry (sea depth), anchor points, coastal hills, tide data, reefs and shoals. Obstructions in the water are marked ‘gr’ (rough), ‘h’ (hard), ‘k’ (clay), ‘kr’ (coral), ‘m’ (mud), ‘st’ (stones), and ‘z’ (sand).

Map of the Penang Strait, including written instructions on how to navigate the strait. On land, areas of cultivation are marked, with a table listing acreage used for each crop. A boundary with Siam based on an 1831 treaty is also shown.