China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 https://maps.cga.harvard.edu/tgaz/placename/hvd_82434 河陰縣 河阴县 Heyin Xian 县 縣 xian county 1370 4 1763 4 POINT point N 34.89375 E 113.42737 FROM_FD 郑州 Zheng Zhou 开封府 Kaifeng Fu 郑州直隶州 Zheng Zhouzhili Zhou 开封府 Kaifeng Fu CHGIS