The concept of impervious surface fraction has been defined as the percentage of impervious surface to the total and is widely used to indicate the surface structure in urban region for environmental studies to such important problems as the land surface runoff,urban heat islands effect,environment and water pollution.Using an ETM+ image of the Haizhu district,Guangzhou city in 2000 as the data source,we developed an approach to compute the fraction from the ETM image through combination of the Vegetation-I...
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