高分一号卫星遥感影像提取冰川堰塞湖水体方法比较  

The Comparison of Methods for Extracting Water Body from GlacierBarrier Lake by GF-1 Satellite Remote Sensing Images

作　　者：张青 冯志敏 陈鹏 ZHANG Qing;FENG Zhimin;CHEN Peng(The Center for Ecological Meteorology and Satellite Remote Sensing of XinjiangUygur Autonomous Region,Urumqi 830011,China)

机构地区：[1]新疆维吾尔自治区生态气象和卫星遥感中心,新疆乌鲁木齐830011

出　　处：《测绘与空间地理信息》2021年第1期17-19,24,共4页Geomatics & Spatial Information Technology

基　　金：新疆中亚大气科研研究基金项目(CAAS202013);新疆气象局软科学研究项目(XJQX2020014)资助。

摘　　要：快速准确地从遥感影像提取冰川堰塞湖水体信息,是研究冰坝遥感监测与应急监测的核心热点问题。以GF-1卫星遥感影像为主要数据源,采用归一化差分水体指数(NDWI)、改进阴影水体指数(ENDWI)和面向对象(SVM)对克亚吉尔冰川堰塞湖水体进行定量提取。比较分析3种水体判识方法,3种方法均可以提取完整的水体边界,并且抑制了90%以上的非水体信息。NDWI法和ENDWI法可应用于GF-1地表水体提取,能够满足冰坝水体监测与应急监测需求,但面向对象法最适宜GF-1影像的水体信息准确提取。The rapid and accurate extraction of water body information of the glacier barrier lake from the remote sensing image is the core hot spot of the research on the remote sensing monitoring and emergency monitoring of the ice dam.Taking GF-1 satellite remote sensing image as the main data source,the quantitative extraction of water body information of Keyajir glacier barrier lake was completed by adopting normalized difference water body index(NDWI),improved shadow water body index(ENDWI),and object-oriented method(SVM).Three methods of water extraction were compared and analyzed,the results show that the three methods can extract the complete water boundary and suppress more than 90%of the non-water information.NDWI method and ENDWI method can be applied to GF-1 surface water extraction,which can meet the requirements of ice dam water monitoring and emergency monitoring,but object-oriented method is most suitable for accurate extraction of GF-1 image water information.

关 键 词：冰川堰塞湖 GF-1 高分辨率影像 水体信息提取 

分 类 号：P237[天文地球—摄影测量与遥感]