中文摘要：

为探索改革开放以来长株潭城市群的土地利用变化特征，本文首先对1978、1994、2006年的卫星遥感数据采用决策树和智能分类相结合的方法分类，1990、2000、2010年的土地利用数据和2015年地理国情普查数据重分类。通过统计计算，定量分析长株潭主城区各时相的土地利用综合程度、土地利用程度变化量和变化率。通过空间叠加，定性分析长株潭主城区自改革开放以来土地利用相互转换程度及各转换类型所在区域。研究结果表明，耕地、林地和建筑用地所占比例变化较大，水域、草地、未利用地所占比例较小，土地利用一直处于发展状态．每年耕地和林地大幅度向建筑用地转换，不同时相转换区域各有差异。本文研究可为长株潭城市群土地利用规划提供参考．且有利于长株潭主城区土地利用的可持续发展和生态环境保护。

英文摘要：

To implore the characteristics of land use change of Changzhutan urban area, first of all, this paper class satellite remote sensing data by the method of combining decision tree and intelligent classification in 1978, 1994 and 2006. Then, this paper reclass the land use data in 1990, 2000 and 2010 and geographical state census data in 2015. By statistical calculation, this paper quantita- tively analysis the land use comprehensive degree and the degree of land use change and the rate of change of each phase of Changzhu- tan urban area. Through space superposition, this paper qualitatively analysis the land use extent of mutual transformation and the transformation type area of Changzhutan urban area since the reform and development. Research results show that cultivated land, for- est land and construction land accounted for a larger area ratio change. Water, grassland and unused land proportion is small. Land use degrees become deepening and widely year by year and land use has been in a state of development. Cultivated land and forest land significantly conversed to the construction land each year and transition areas vary at the different time. This paper provides a ref- erence for the land use planning of Cbangzhutan urban area and is conducive to the sustainable development of the land use and ecolog- ical environment protection of Changzhutan urban area.