this sheet embraces the triangular peninsula between the lampoeng and the semangka bay, furthermore a part of the peninsula between the semangka bay, furthermore a pasrt of the peninsula between the semangka bay and the indian ocean and finally the island of taboean. administratratively, this area belongs to the residency of the lampoeng districts, …
The mapped area comprises the whole of north sumatra, which morphologically forms a characteristic unit and belongs to the province of atjeh and dependencies and in part to sumatra's eastcoast.