石磊;杨武年;杨彦通;陈平;

• 1:成都理工大学国土资源部地学空间信息技术重点实验室/地球科学学院

摘要(Abstract)：

针对植被指数和植被覆盖度与遥感影像空间尺度的关系对高分辨率影像在植被分析中的运用具有重要影响的问题,该文提出一种确定最佳分辨率的方法。以云南鲁甸县茨院乡为研究区,先对原始影像(Worldview-2)进行重采样处理,生成一系列低分辨率影像;计算13组数据的NDVI并利用像元二分模型反演出植被覆盖度;运用信息熵理论和按照局部方差的思路等两种方法,定量分析该区植被分析的最佳分辨率。实验结果表明,随着空间分辨率的降低,NDVI值域区间呈现收敛趋势;植被覆盖度分级图斑斑块数量急剧减少,而所占面积比则保持相对平稳;信息熵中的信息量也随之减少。分析结果认为,该区进行基于Worldview-2影像植被分析的最佳空间分辨率为12m。

关键词(KeyWords)： Worldview-2;NDVI;植被覆盖度;信息熵;局部方差

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41372340);; 国土资源部地学空间信息技术重点实验室基金项目(KLGSIT2014-05);; 高等学校博士学科点专项科研基金课题项目(20105122110006,201351221200092013)

作者(Authors): 石磊;杨武年;杨彦通;陈平;

DOI: 10.16251/j.cnki.1009-2307.2017.03.012

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