The map would later be owned by the Pirate Lord of Singapore, Sao Feng.

It used meridian arcs, equatorial divisions, geographic landmarks and magic keys to guide one's spiritual passage. Originally given to the esteemed and great navigator Wu Ling, who was known for going on various journeys to the mysterious gates of the afterlife, this map was prized above all other charts. With no fixed points, this chart was the only guide that took into account the role of chance, fate and the supernatural in mortal affairs. The Mao Kun Map, sometimes referred as the navigational charts or the Map to the Land of the Dead, was the map used to locate some of the world's more obscure and mystical places.

But it leads to more places.' ― Will Turner and Tai Huang These can't be as accurate as modern charts.'