Analysis of Land Use Change in Xiangyun County Based on Remote Sensing and GIS

祥云县位于云贵高原与横断山脉的交汇处，由于该地区地形分布破碎，农用地利用率低，本文使用遥感技术和GIS技术，结合土地利用变化幅度、动态度和转移矩阵法，研究了2003年至2023年祥云县土地利用变化总体特征、动态变化和迁移情况。结果表明，随着城市化进程不断推进，建筑用地在所有时段均有增加；由于城市扩张、工业发展等因素，耕地在2003~2013和2013~2023年间内均有明显减少；伴随着政府的植树造林和生态保护等政策，林地在2003~2013年间减少了31.68 km2，2013~2023年间又增加了27.56 km2；草地和耕地都发生了较大转移，林地也较为显著的转移转移为草地和灌木。Xiangyun County is located at the intersection of the Yunnan-Guizhou Plateau and the Hengduan Mountains. Due to the fragmented terrain distribution and low utilization rate of agricultural land in this area, this paper uses remote sensing technology and GIS technology, combined with the land use change amplitude, dynamic degree and transfer matrix method, to study the overall characteristics, dynamic changes and migration of land use change in Xiangyun County from 2003 to 2023. The results show that with the continuous progress of urbanization, the building land increases at all times. Due to urban expansion and industrial development, cultivated land decreased significantly in 2003~2013 and 2013~2023. With the government’s afforestation and ecological protection policies, the forest land decreased by 31.68 km2 from 2003 to 2013 and increased by 27.56 km2 from 2013 to 2023. Grassland and cultivated land have been greatly transferred, and woodland has also been significantly transferred to grassland and shrubs.