Taking TM images, SPOT photos and DEM images as the basic information, this paper had not only put forward a kind of manual controlled computer-automatic extrac
Shanghai is a coastal metropolitan city with various types of natural wetlands, which account for 23.5% of its total area. According to the definition of wetlan
With the quick development of urbanization, urban expansion has been paid more and more attention to by researchers from western countries and China. Here Wuxi
Based on the questionnaire investigation, the authors make a comparative study on local residents'perception of tourism impacts in Xidi, Zhouzhuang and Jiuh