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Map of Lake Toba and the surrounding area in northern Sumatra, featuring mountains, forests, types of terrain (undergrowth, field, grass), rivers, roads and settlements. There is an inset map that shows the other maps referenced in producing the map.

Map of the lands of the Pakpak people, an ethnic group of Batak people of northern Sumatra. The names of various sub-ethnic groups—Siem Siem (Pakpak Simsim), Pegagan (Pakpak Pegagan), Kepas (Pakpak Keppas)—are marked to show their territories.

A hand-drawn map of Lake Toba, northern Sumatra, marked with the route of an eight-day journey around the southern lake area—both on land and by boat—starting and ending in the town of Baligé.