基于Landsat影像的赤峰市城区扩张时空变化及驱动力分析

Spatial and temporal change and driving force analysis of urban sprawl based on Landsat image in Chifeng City

摘要: 选取赤峰市区2003、2009、2013和2018年的Landsat TM/OLI遥感影像,利用支持向量机法分类法提取4个年份的中心城区，结合GIS空间分析方法研究城区扩张强度、速度在时间尺度下的变化趋势。结果表明：2003～2018年间，赤峰市中心城区由高速扩张转向低速发展，城镇化率由389%上涨至20.55%。

Abstract: Landsat TM/OLI remote sensing images from 2003,2009,2013 and 2018 were selected in Chifeng, Support Vector Machine(SVM) method was used to ext ract 4 years of central city,the change trend of urban expansion intensity and speed was studied combining GIS spatial analysis method on time scale,the results showe d thatthe central urban area of chifeng changed from high-speed expansion to low-speed development,the urbanization rate rose changed from 3.89% to 20.55% from 2 003 ~ 2018.