A Comparative Study on Land Use/Cover Change Detection Methods Based on Landsat TM Images:A Case Study of Dafeng,Jiangsu

The choice of an appropriate change detection method is much more significant to the research of land use/land cover change.This study has taken Dafeng City,a representative area of Jiangsu coastal zone,as the study area to be the comparative study of change detection methods.In this study,two periods of Landsat TM images(1992,2002) are used to conduct the change detection.The three methods including the principal component analysis(PCA),hybrid change detection and change vector analysis(CVA) were used.Results of each method are showed by the land use/cover change information,advanced quantitative analysis and comprehensive comparison.It is demonstrated that PCA is the most suitable change detection method for the study area and even the entire Jiangsu coastal zone because of its higher speed and higher precision.Finally,in this study five periods of land cover classification maps of Jiangsu coastal zone during the last 30 years are successfully compiled based on PCA and post-classification comparison.