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This geological map of the district of Toboali (Bangka Island, east of Sumatra) uses colours to depict types of rocks, soils and minerals. Tin mining areas are also highlighted.

A geological map showing the types of rock and minerals found in Blinjoe district on the island of Bangka, off the east coast of Sumatra. Deposits of iron, quartz and tin are marked, and coral is shown at the coast.

A map of the administrative divisions of Sumatra and the Malay Peninsula. The mountains of western Sumatra and the central Malay Peninsula are represented by hachures: short lines/dashes that give a sense of the shape and steepness of terrain.

Map of the residency of Pekalongan, Central Java, divided into two regencies (Pekalongan and Batang) and 12 districts. The southern half is dominated by mountains, with more towns in the northern half near the sea. Sugar factories are marked.