Methods of water extraction from ZY-1 02C satellite imagery

doi:10.6046/gtzyyg.2014.02.08

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Abstract

Taking into consideration the needs of the remote sensing monitoring and application with Chinese resource satellite in west highland lakes, the authors carried out research on water extraction method by using ZY-1 02C satellite images. The two traditional spectral indexes i.e., the normalized difference vegetation index(NDVI)and the normalized differential water index(NDWI), were used to extract the water bodies in Longyangxia reservoir and, by combining these two kinds of water extraction method, a decision tree water extraction method was presented in this paper. Taking the manual interpretation of the water region as the reference,the authors used the overall area of the water extraction results, the detail extraction and the rate of error extraction results to make statistic and comparative analysis. The experimental results show that the NDVI method is susceptible to the influence of thin cloud, but is less affected by snow and terrain. Under the imaging conditions of snow,thin cloud and mountain shadows,the NDWI method is subject to different degrees of impact. In spite of the fact that it is susceptible to mountain terrain effects such as shadows,the method of the decision tree can effectively eliminate the interference of climate conditions such as snow and thin cloud.

Keywords TM alteration information principal component analysis density segmentation

TP751.1

Issue Date: 28 March 2014

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	XIA Qing
	YANG Wunian
	ZHAO Ni

Cite this article:

XIA Qing,YANG Wunian,ZHAO Ni. Methods of water extraction from ZY-1 02C satellite imagery[J]. REMOTE SENSING FOR LAND & RESOURCES, 2014, 26(2): 43-47.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2014.02.08 OR https://www.gtzyyg.com/EN/Y2014/V26/I2/43

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