摘要
在光谱特征分析的基础上,应用MODIS数据不同水体指数对水体信息进行识别,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。
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.
出处
《国土资源遥感》
CSCD
2008年第4期22-26,I0003,共6页
Remote Sensing for Land & Resources
基金
南水北调中线生态规划和保护项目
