TY - Journal of Yangtze River Scientific Research Institute A1 - WU Jin, WANG Ping, WANG Jiu, WU Xing-hua, SO Hay-wah T1 - Low Altitude Photogrammetry of Sea Islands and Reefs without Ground Control Points: Research and Application Y1 - 2022-06-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 133 EP - 137 VL - 39 IS - 6 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20210076 ER -