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A Spanish military map of the northern Philippine island of Luzon, highlighting cable and telegraph lines, and aids to maritime navigation such as bathymetry (sea depth) and tide data. A conversion table for metres, fathoms and feet is also shown.

Maritime map of the Philippines, with inset maps of bays showing bathymetry (sea depth), shoals, reefs and anchor points. There is also an inset map of Taal Volcano, and elevations (side views of terrestrial landmarks like mountains and islands).

Two maritime routes—for use during the North-east and ‘fair’ monsoons—are shown on this late 19th century navigation map. The routes lead north through Southeast Asia, passing the Philippines, and ending in Hong Kong. Bathymetry (sea depth) is shown.

This early 19th century hand-drawn map of Manila Bay has detailed instructions in Spanish on how to enter the bay, and the port at Cavite. Bathymetry (water depth), the mouths of rivers, and landmark mountains are shown to aid navigation.