China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 http://tgaz.fudan.edu.cn/tgaz/placename/hvd_70467 柳溝衛 柳沟卫 Liugou Wei 卫 衛 wei military garrison 1727 4 1728 4 POINT point N 40.48349 E 96.84785 FROM_AC 今甘肃安西县东南四家滩 安西直隶厅 Anxizhiliting CHGIS