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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.

Produced in Spain, this mid-19th century map details the islands of Visayas, Mindanao and Palawan in the Philippines archipelago. Bathymetry (sea depth) is marked around the islands and on four detailed inset maps of ports in the region.