摘要
利用landsat-7 ETM+数据,应用改进的归一化差异水体指数(MNDWI)方法提取桂林市及其周边地区水体信息的时候,发现多处喀斯特地貌山体阴影被误判成水体,显然利用单一的MNDWI无法去除这一干扰因素.考虑到水体表面的坡度比较平缓,于是结合坡度信息进行决策树分类,消除了喀斯特地貌山坡阴影产生的干扰,从而准确的提取了桂林市喀斯特地貌地区的水体信息.
When using landsat-7 ETM ＋ data and extracting water information in Gui Lin city and its surrounding regions with the Modified Normal Difference Water Index, it is found that many karst land- forms＇ ubac are misjudged as water. Obviously, the interference factor with single MNDWI can not be eliminated. In consideration of the subdued slope of surface, to classify decision tree with slope information can eliminate interference factor that results from karst landforms so as to extract water information accu- rately in Guilin karst landform area.
出处
《广西师范学院学报（自然科学版）》
2010年第1期63-66,共4页
Journal of Guangxi Teachers Education University(Natural Science Edition)
关键词
遥感
水体
坡度
决策树
remote sensing
water
slope
decision tree
