Monitoring land use and land cover change(1997-2003) of Guangzhou and discussing its dynamic mechanism based on TM data Land cover classification of Yancheng Coastal Natural Wetlands based on BP neural network and ETM+ remote sensing data Temporal and spatial characteristics of Beijing Golf Courses over the past 30 years Change detection of remote sensing images based on multiscale segmentation and decision tree algorithm over mountainous area: a case study in Panxi region,Sichuan Province