基于Landsat影像的城市土地利用时空特征变化研究  

Research on the spatio-temporal characteristics of urban land use changes based on Landsat images

作　　者：吕德国 LV Deguo(Fujian Institute of Surveying and Mapping,Fuzhou,Fujian 350003,China)

机构地区：[1]福建省测绘院,福建福州350003

出　　处：《测绘标准化》2025年第1期131-138,共8页Standardization of Surveying and Mapping

摘　　要：本文以多时相Landsat影像作为主要数据源,利用基于特征优选改进的U-Net深度学习算法获取了研究区的土地利用分类图,并根据相关计算指标对研究区土地利用变化速度和程度进行分析,探讨研究区土地利用变化的驱动力因素及其变化特点。结果表明,研究区2000—2021年期间的综合土地利用动态度为0.84%,该指标除了2000—2004年和2009—2015年分别达到1.60%和1.19%外,其余每年的综合土地利用动态度在0.9%左右。受到建成区扩展的影响,研究区建设用地占比不断增加,而裸地和林地的占比有所下降,水体的占比相对稳定,耕地整体保持了一定的增长态势。整体而言,研究区的土地利用程度综合指数呈现增长趋势,反映了土地利用的集约化和多样化。This paper uses multi-temporal Landsat images as the main data source and utilizes the U-Net deep learning algorithm based on feature optimization to obtain the land use classifications of the study area.The speed and degree of land use changes in the study area are analyzed based on relevant calculation indicators,and the driving factors and characteristics of land use change of the study area are explored.The results show that the comprehensive dynamic land use degree of the study area is 0.84% from 2000 to 2021,the others are about 0.9%,except that 1.60% and 1.19%respectively from 2000 to 2004 and from 2009 to 2015.Affected by the expansion of the built-up area in the study area,the proportion of construction land is increasing,while the those of bare land and forest land is decreasing,the water body is relatively stable,and the overall cultivated land has been growing.Overall,the comprehensive index of land use degree in the main urban area in the study area shows an increasing trend,reflecting the intensification and diversification of land uses.

关 键 词：Landsat影像 土地利用分类 时空特征变化 

分 类 号：P237.3[天文地球—摄影测量与遥感] TP751.1[天文地球—测绘科学与技术]