China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 https://maps.cga.harvard.edu/tgaz/placename/hvd_112904 滄州 沧州 Cang Zhou 州 州 zhou region 517 3 605 3 POINT point N 37.85783 E 117.13636 北魏 Beiwei 东魏 Dongwei 北齐 Beiqi 北周 Bei Zhou 隋 Sui CHGIS