China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 http://tgaz.fudan.edu.cn/tgaz/placename/hvd_115042 北地郡 北地郡 Beidi Jun 郡 郡 jun commandery 126 3 556 3 POINT point N 35.12764 E 108.80525 三原县 Sanyuan Xian 云阳县 Yunyang Xian 云阳县 Yunyang Xian 富平县 Fuping Xian 富平县 Fuping Xian 富平县 Fuping Xian 弋居县 Yiju Xian 泥阳县 Niyang Xian CHGIS