干旱区生态环境知识资源中心(Arid): 石漠化程度遥感信息提取方法研究

Arid

	石漠化程度遥感信息提取方法研究
其他题名	Retrieval of Rock-desertification Degree from Multi-spectral Remote Sensing Images
	夏学齐 1; 田庆久 2; 杜凤兰 2
ISSN	1007-4619
出版年	2006
卷号	10 期号:4 页码:469-474
中文摘要	岩溶石漠化是中国西南地区的一种严重的生态环境问题。近年来有进一步恶化的趋势。本文以贵州省普定县典型研究区IKONOS遥感数据为例，给出了一种利用多光谱遥感数据定量提取岩溶石漠化程度信息的算法。在多维光谱的向量空间分析的基础上，提出了植被线的概念，并定义石漠化几何指数（GRI）为多维向量空间中不同程度的石漠化像元到植被线的归一化距离。作者认为使用这种方法提取石漠化程度，可以避免人工解译的主观性强，工作量大的缺点。使提取到的石漠化程度结果客观稳定。
英文摘要	Rock-desertification is a unique environmental and ecological problem in Southwest China. As remote sensing is an important way of monitoring variation of rock-desertification, a method for measurement and information retrieval of rock-desertification is developed in this paper. MNF transform is applied to IKONOS data to reduce the number of spectral dimensions to 3. In this 3-demension, endmembers in the image are found out and analyzed. It is found that various vegetations group into a line called ＂vegetation line＂, in which ＂dark vegetations＂, such as coniferous forest and broadleaf forest, continuously change to ＂bright vegetations＂, such as grasses. It is presumed that is caused by deferent proportion of shadow mixed in leaves or branches in various types of vegetation. The normalized distance between points for rock-desertification and the vegetation line is defined as Geometrical Rock-desertification Index（GRI） , which can be used to scale rock-desertification. This method was used in the IKONOS image of Puding, Guizhou province and showed many advantages.
中文关键词	石漠化 ; 遥感 ; 终端单元 ; 植被线 ; 石漠化几何指数（GRI）
英文关键词	rock-desertification remote sensing endmembers vegetation line geometrical rock- desertification index （GRI）
语种	中文
国家	中国
收录类别	CSCD
WOS类目	REMOTE SENSING
WOS研究方向	Remote Sensing
CSCD记录号	CSCD:2472448
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220325
作者单位	1.南京大学地球科学系, 南京, 江苏 210093, 中国; 2.南京大学国际地球系统科学研究所, 南京, 江苏 210093, 中国
推荐引用方式 GB/T 7714	夏学齐,田庆久,杜凤兰. 石漠化程度遥感信息提取方法研究[J],2006,10(4):469-474.
APA	夏学齐,田庆久,&杜凤兰.(2006).石漠化程度遥感信息提取方法研究.,10(4),469-474.
MLA	夏学齐,et al."石漠化程度遥感信息提取方法研究".10.4(2006):469-474.