《水经注·卷十二》
孙杨之的《述画》中有督亢地图，说到燕太子丹派荆柯到秦国献图，秦始皇杀了荆柯，图也从此亡佚了。
孙畅之《述画》有《督亢地图》，言燕太子丹使荆轲赍入秦，秦王杀轲，图亦绝灭。
Sun Yangzhi's "Painting Narrative" contains a map of Dukan, and discusses the fact that when the Prince of Yan Dan sent Jing Ke to Qin to present the map, Qin Shi Huang killed Jing Ke, and the map was subsequently lost.