China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 http://tgaz.fudan.edu.cn/tgaz/placename/hvd_70270 龍泉縣 龙泉县 Longquan Xian 县 縣 xian county 742 4 906 2 POINT point N 37.50098 E 110.25407 FROM_AC 今陕西绥德县城 CHGIS