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A Sensitivity Analysis and Accuracy Assessment of Different Water Extraction Index Models Based on ALOS AVNIR-2 Data

doi:10.6046/gtzyyg.2010.04.10

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Abstract

In this study, spectral characteristics of water bodies and other objects in ALOS AVNIR-2 imagery in areas near Huizhou of Guangdong Province were analyzed. The impact of the threshold on the sensitivity of extracting water and the maximum precision of the four different water index models were studied. It is found that the water area in the image can be extracted well using these index models. The result shows that the application effects decrease in order of NDWI，NIR，NDVI and RVI. If the proper threshold is chosen，the overall accuracy can reach the highest and the value is nearly 98 % by using NDWI，which, moreover, is not sensitive to the threshold.

Keywords Desktop virtual reality Characteristic Key technique Application

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	TP 79

Issue Date: 02 August 2011

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	JIANG Nan
	YU Gao-yu

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JIANG Nan,YU Gao-yu.
A Sensitivity Analysis and Accuracy Assessment of Different Water Extraction Index Models Based on ALOS AVNIR-2 Data[J]. REMOTE SENSING FOR LAND & RESOURCES, 2010, 22(4): 46-50.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2010.04.10 OR https://www.gtzyyg.com/EN/Y2010/V22/I4/46

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