摘要
历史重力侵蚀是研究区域重力侵蚀危险性的一个重要数据,通过多期航片、卫星影像结合野外调查是快速确定重力侵蚀发生区域的主要方法。以马来西亚金马仑高原作为研究区,选取不同时相的SPOT5数据,运用主成分分析方法,提取发生重力侵蚀的区域。研究表明,通过多时相主成分分析得到的第二主成分主要反映了地表植被的变化信息,运用阈值法可快速提取可能发生重力侵蚀的区域。
Gravitational erosion inventory is an important datum for the research on regional gravitational erosion hazard, and can be obtained from multi-temporal aerial, satellite photographs and field survey. The Cameron Highlands of Malaysia was selected as the study area. Two SPOT5 images of different time were selected, and then were analyzed using principal components analysis to extract the changed region. The result shows that the change information was mainly represented by the second principal component. Then the possible region of gravitational erosion occurrence can be extracted using threshold method.
出处
《世界地质》
CAS
CSCD
2008年第2期214-219,224,共7页
World Geology
基金
河南省地质调查院对外国际合作项目"环境遥感监测技术研究"
关键词
主成分分析
重力侵蚀
金马仑高原
马来西亚
principal component analysis
gravitational erosion
Cameron Highlands
Malaysia
