基于TM数据的锦州市建成区扩张分析

Analysis of the Expansion of Built-up Areas in Jinzhou City Based on TM Data

以锦州市TM影像为数据源,通过监督分类的方法获取了锦州市2004-2021年4个时间段同季度的影像分类结果,设定高楼区与棚户区的交界处为城市建成区的边界,成功提取了锦州市2004年、2009年、2014年和2021年的城区范围,并在此基础上,对城区的扩张方向以及土地利用变化情况进行了分析。结果表明:锦州市在2004-2021年主要呈扇形向西、南、北3个方向扩张,扩张速率为1.461 km 2/a,城区重心向南移动了0.3 km,向西移动了0.2 km。其中,向南扩张是主体。城区扩张规则,稳定性也在逐年增加。

Using the TM image of Jinzhou City as the data source,this paper obtains the image classification results of Jinzhou City from 2004 to 2021 in the same quarter through supervised classification method.The boundary between high-rise buildings and shantytowns is set as the boundary of the urban built-up areas,and the urban area of Jinzhou City in 2004,2009,2014,and 2021 year is successfully extracted.Based on this,the expansion direction of the urban area and the land use change situation are analyzed.The results show that Jinzhou City mainly expanded in three directions:west,south,and north in a fan-shaped manner from 2004 to 2021,with an expansion rate of 1.461 square kilometers per year.The urban center of gravity moved 0.3 kilometers south and 0.2 kilometers west.Among them,southward expansion is the main body.The rules of urban expansion and stability are also increasing year by year.