MODIS数据水体识别指数的识别效果比较分析
廖程浩, 刘雪华
清华大学环境科学与工程系,北京 100084
AN EFFECTIVENESS COMPARISON BETWEEN WATER BODY INDICES BASED ON MODIS DATA
LIAO Cheng-hao, LIU Xue-hua
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China
摘要 在光谱分析的基础上,应用不同水体指数对MODIS数据进行水体信息识别,并对其应用性能进行比较分析。结果表明,混合水
体指数(CIWI)是较理想的水体识别指数。若以反射率计算,并以0为判别阈值,则该指数的提取常数C的最佳取值为-0.85。
就目前的研究成果来看,MODIS数据还不太适合用于小型水体的识别。
关键词 :
桌面图形图像处理 ,
卫星遥感 ,
计算机交互式图像解译 ,
遥感制图
Abstract :This paper has compared the effectivenesses of different water body indices which are applied to
identify water bodies based on the MODIS data. The results show that the Combined Index of NDVI and MIR for Water
Body Identification (CIWI) is the most effective index for water body identification when the MODIS data are used.
In calculating CIWI by using the MODIS reflectance data with 0 as the distinguishing value, the constant in the
expression of CIWI is -0.85. It is also shown that the MODIS data are unsuitable for small water body
identification because their spatial resolution is not very high.
Key words :
Desktop graph and image processing
Remote sensing of satellite
Computer interactive image interpretation
Remote sensing mapping
收稿日期: 2008-07-16
出版日期: 2009-06-23
基金资助: 南水北调中线生态规划和保护项目。
通讯作者:
廖程浩(1984-),男,研究生,主要研究方向为生态修复和3S技术应用。
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