ADVANCES IN RESEARCHES ON APPLICATION OF REMOTE SENSING METHOD TO ESTIMATING VEGETATION COVERAGE

Vegetation coverage is a very important ecological environment parameter,and remote sensing imagery can provide the vegetation coverage information and variation trend on different spatial scales.Remote sensing is an important means in obtaining vegetation coverage,and vegetation indices are indirect indices which can reflect vegetation cover and biomass.The methods for estimating vegetation coverage based on vegetation indices include experiential models,vegetation indices,pixel unmixing analysis and FCD(Forest Canopy Density) mapping model,and the methods for estimating vegetation coverage based on decision tree classification and artificial neural network have made some progress as well.This paper has analyzed and discussed the present methods for estimating vegetation coverage based on remote sensing imagery as well as their advantages and disadvantages.The future trend of vegetation cover study based on remote sensing technology is also discussed in this paper.