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Hand-drawn portolan (nautical) chart, featuring a rhumbline network (the web of interconnected lines), bathymetry (sea depth), shoals and reefs, and names of coastal settlements, all to aid navigation. With a colourful compass rose.

Hand-drawn portolan (nautical) chart, featuring a rhumbline network (the web of interconnected lines), bathymetry (sea depth), shoals and reefs, elevations (side views of landmark mountains), and names of coastal settlements, all to aid navigation.

This mid-17th century map of Southeast Asia has a maritime focus, with shoals and reefs, and the coastal areas marked in great detail, while the interiors remain mostly blank. The Great Wall of China can be seen at the top of the map.