Treatise on Armament Technology, Volume 215

original: 武備志 (Wubei Zhi); compiled during the Ming Dynasty, this is the most comprehensive military encyclopedia in Chinese history.

Section on Divination and Measurement

original: 占度 (Zhandu); this category covers surveying, mapping, and the interpretation of environmental or celestial signs for military strategy.

General Map of the Zhejiang Coast

Zhejiang is a vital eastern coastal province that faced significant threats from piracy and maritime incursions during the Ming Dynasty.

Map of Wenzhou Prefecture, Zhejiang

Prefecture (府, Fu) was a high-level administrative division in imperial China.

Map of Taizhou Prefecture, Zhejiang

Map of Ningbo Prefecture, Zhejiang

Ningbo was a major port city and a key point for both international trade and maritime defense.

Compiled by Mao Yuanyi, also known by his courtesy name Fangfeng

Mao Yuanyi (1594–1640) was a military specialist who compiled this massive work to address the declining security of the Ming Empire.