TY - Journal of Yangtze River Scientific Research Institute A1 - WANG Zheng-yong, YANG Sheng-mei,MA Kun, NING Jing, HE Liang, HAN Xian-quan T1 - Extraction of River Networks of Liugu River WatershedBased on Spatial Information Technology Y1 - 2016-11-20 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 63 EP - 67 VL - 33 IS - 11 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20160130 ER -