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A map of the northern Philippine islands with a rhumbline network, a web of lines to aid navigation. Bathymetry (sea depth), shoals and reefs are marked, reinforcing the maritime theme. The compass rose points left, indicating north’s direction.

Map of the Siamese city of Ayutthaya (‘Iudiad’) represented pictorially, surrounded by rivers and with a grid-like layout of roads, rivers and buildings. The city existed from 1350 until 1767 when it was destroyed by an invading Burmese force.

Hand-drawn map of the Singapore Strait, with Singapore above (green coastline) and the Riau Archipelago below. Bathymetry (sea depth), shoals and reefs are marked. Two mountains at the eastern end of the strait are shown in profile as landmarks.

This seventeenth century map focuses on the Sunda Islands of maritime Southeast Asia, and features a rhumbline network, a web of lines to help plot routes and aid navigation.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.

Unusually, north is located to the left of this map of East Asia, rather than the top. The text notes that shallows and reefs are marked, and that the map is based on the explorations of Portuguese ships. Illustrations include sea monsters and ships.