基于遥感影像的天津市土地利用时空变化研究

Research on Urban Expansion of Tianjin City Based on Remote Sensing Image

利用卫星遥感影像来研究城市扩展,使用遥感手段提取各时间段内城市的建设区域,并分析扩张过程的时空特征,与传统研究土地利用动态监测的方法比较,具有很大优势。本文以天津市作为研究区域,基于1997年、2007年和2017年3个时期的Landsat影像,利用面向对象分类法进行土地利用类型分类,进而对天津市20年以来城市扩展的时空变化特征及其土地利用差异进行重点研究和分析。试验分析表明,近20年天津市整体扩张、居民地对耕地及裸地侵占、城市扩张的进程有明显的地域差异。

The use of satellite remote sensing images to study urban expansion,the use of remote sensing means to extract urban construction areas in each period of time,and analysis of the spatial and temporal characteristics of the expansion process,compared with traditional methods of land use dynamic monitoring,has great advantages.Based on Landsat images of 1997,2007 and 2017,the object-oriented classification is used to classify land use types,this paper focuses on the spatial and temporal characteristics of urban expansion and land use differences in Tianjin over the past 20 years.The experimental analysis shows that the overall expansion of Tianjin in the past 20 years,the occupation of cultivated land and bare land by residents,and the process of urban expansion have obvious regional differences.