Evaluation of Urban Environmental Quality with High Resolution Satellite Images

It can serve for the city planning scientifically and improve the people´s knowledge about the detailed surroundings by evaluation of urban environment status from high resolution satellite images. Environmental factors such as vegetation type and coverage, water area and water pollution can be known from the images directly, the population density can be calculated from the building structure, the air pollution and the noise pollution come from the composition of the buildings and the roads. It takes IKONOS images to test the environmental quality of Nanjing in this paper. Firstly, different methods are used to extract the environmental factors information from the images, the statistical data of the environment protecting bureau and the government are used to test the precision; secondly, weight of each environmental factor is determined; finally, the environmental quality of each unit is calculated. The results accords with the standpoint of the inhabitant and the house price of the actual market.