CAJ | 학술논문

卫星遥感技术已被广泛应用到水体信息提取中，但目前基于遥感技术的水体信息提取多采用单一的遥感数据源，而没有充分利用多源数据的信息复合优势，因此，提取结果经常受天气气候或空间分辨率限制。本文研究了不同尺度、不同平台的多种遥感数据源的水体信息提取方法。首先，基于波谱间关系决策树分类算法对Landsat ETM＋图像进行水体提取，利用其分辨率优势较准确地提取出水体范围；其次，在Radarsat SAR图像上利用阈值法粗提取水体信息后，结合DEM剔除阴影得到水体信息；最后，利用灾前Landsat ETM＋图像水体信息提取结果和灾中Radarsat SAR图像水体信息提取结果，进行差值处理，得到洪水淹没范围。研究结果可以为洪水灾害监测与评估提供信息依据。
위성요감기술이피엄범응용도수체신식제취중，단목전기우요감기술적수체신식제취다채용단일적요감수거원，이몰유충분이용다원수거적신식복합우세，인차，제취결과경상수천기기후혹공간분변솔한제。본문연구료불동척도、불동평태적다충요감수거원적수체신식제취방법。수선，기우파보간관계결책수분류산법대Landsat ETM＋도상진행수체제취，이용기분변솔우세교준학지제취출수체범위；기차，재Radarsat SAR도상상이용역치법조제취수체신식후，결합DEM척제음영득도수체신식；최후，이용재전Landsat ETM＋도상수체신식제취결과화재중Radarsat SAR도상수체신식제취결과，진행차치처리，득도홍수엄몰범위。연구결과가이위홍수재해감측여평고제공신식의거。
Satellite remote sensing technology has been widely used to extract water -body information .However , nowadays a single kind of remotely sensed data is usually used to extract water -body information , but the advantage of the combination of multi -source datum information is ignored .Consequently , the accuracy of water information extraction is often limited to the climate or spatial reso-lution.In this paper, a new method based on multi -scale and multi -platform remotely sensed data is explored to extract water -body information .The main research includes several steps as follows:first, decision tree classification algorithms based on relation-ships between spectrum are used to extract the accurate size of water -body on Landsat ETM +image due to its high spatial resolu-tion;second, the method of threshold value is used to extract water -body information on Radarsat SAR image crudely , then more ac-curate water-body information is obtained by eliminating the shadow influence combined with DEM ; finally, the flood extent is ob-tained by using differential technique of the water -body information extracted from the Landsat ETM +image before flood disaster and Radarsat SAR image during flood disaster .The new method explored in this paper can provide information support for flood disaster monitoring and evaluation .