| MODIS数据水体识别指数的识别效果比较分析 |
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| 引用本文： | 廖程浩,刘雪华. MODIS数据水体识别指数的识别效果比较分析[J]. 国土资源遥感, 2008, 19(4): 22-26 |
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| 作者姓名： | 廖程浩 刘雪华 |
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| 作者单位： | 清华大学环境科学与工程系,北京,100084 |
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| 基金项目： | 南水北调中线生态规划和保护项目 |
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| 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。
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| 关 键 词： | MODIS数据； 水体识别； 水体指数 |
| 收稿时间： | 2008-07-16 |
| 修稿时间： | 2008-08-21 |
AN EFFECTIVENESS COMPARISON BETWEEN WATER BODY INDICES BASED ON MODIS DATA |
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| Liao Cheng-hao,Liu Xue-hua. AN EFFECTIVENESS COMPARISON BETWEEN WATER BODY INDICES BASED ON MODIS DATA[J]. Remote Sensing for Land & Resources, 2008, 19(4): 22-26 |
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| Authors: | Liao Cheng-hao Liu Xue-hua |
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| Affiliation: | Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China |
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| 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. |
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| Keywords: | MODIS data Water Identification Water body index |
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