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This title of this map refers to orography (which is shown in the use of hachures, short lines/dashes that give a sense of the shape and steepness of terrain) and hydrography (which is shown in the highlighting of coastal regions, shoals and reefs).

Based on surveys by Sir Stamford Raffles, this German map of Sumatra focuses on the navigation of coasts and straits, with bathymetry (sea depth), anchor points, shoals and reefs marked, including on inset maps of Singapore and the Bangka Strait.