Dandong aerial photography

The Great Wall of Ming Dynasty Jiayuguan Ming Great Wall is a military defense project built in the northern part of Ming Dynasty, also known as the side wall, which is different from the Great Wall of Wan Li built by Qin Shihuang. National Cultural Heritage Administration and the State Bureau of Surveying and Mapping released the data of the Ming Great Wall for the first time on April 6, 2009 at 5438+08: it starts from Hushan, Liaoning, along the Yalu River in the east and ends at Jiayuguan, Gansu at the foot of Qilian Mountain in the west.