Application of UAV aerial survey and remote sensing technology in the improvement and renovation of existing railways: taking the Baotian section of the Longhai Railway as an example
CHEN Fuqiang, WEI Yujun, MA Bangchuang, LI Dan, LIU Yuxin, ZHANG Zhanzhong
Bulletin of Surveying and Mapping . 2025, (4): 158 -163 .  DOI: 10.13474/j.cnki.11-2246.2025.0426