Study on the clustering of surface cover changes within the red line of Beijing's ecological protection
ZHANG Yi, CHEN Pinxiang, LIU Yu, YU Yongxin, WU Runze, XU Tianhao, YANG Xudong, GONG Yun
Bulletin of Surveying and Mapping . 2022, (3): 13 -17,22 .  DOI: 10.13474/j.cnki.11-2246.2022.0069