The study of the expansion of construction land and its quality characteristics of urban agglomeration is of great value for the construction of high-quality spatial structure of urban agglomeration.Taking the Changsha-Zhuzhou-Xiangtan urban agglomeration as the researc...MORE The study of the expansion of construction land and its quality characteristics of urban agglomeration is of great value for the construction of high-quality spatial structure of urban agglomeration.Taking the Changsha-Zhuzhou-Xiangtan urban agglomeration as the research object,this paper uses the Landsat TM/ETM remote s...