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Two maps about irrigation systems on Java. The first shows areas where systems are in place or being created, with their size. The second map shows Java divided into irrigation departments (both on trial and in operation).

A map of the residency of Soerabaja (East Java) divided into regencies, departments and districts. There are large fishing ponds around the coasts. An inset map shows distances between settlements by road, tracks and paths.

Hand-drawn map of a forest at Tjibodas, Java, with the positions of some of the trees marked. Each tree has a number that corresponds to a list that gives the tree’s species.

Large-scale topographic map of the residency of Madoera (Madura, off north east coast of Java) spread over multiple sheets plus a cover sheet of the whole area. It is divided into departments and districts. Only 60 out of ~120 sheets are available.