基于RS和GIS的徐州市建成区扩展研究

A Study on the Expansion of Build-up Areas in Xuzhou Based on RS and GIS

利用ERDAS及ARCGIS软件,以徐州1979年、1994年及2000年的遥感图像为数据源,结合1∶50 000地形图研究徐州市建成区的扩展情况。首先对遥感图像进行分类,根据分类结果计算出不同年份建成区的面积、扩展速度和扩展变化的主要方向。结果表明:徐州市建成区扩展为外向型扩展,根据现有的遥感图像,将其在扩展时间上分为两个时段,以1994年为分界点,1979至1994年以向西南和东北方向扩展为主,1994年至2000年以后为向西南及东南方向扩展为主。建成区在1994年到2000年的扩展速度明显快于1979年到1994年的扩展速度。

ERDAS and ARCGIS, MSS, TM, ETM and other software are adopted to study the expansion of build-up areas of Xuzhou City. The remote sensing images of Xuzhou city in 1979, 1994 and 2000, and the 1 ： 50000 topographic map are taken as the data source. They are classified to obtain the areas and direc- tions of expansion, and the speed of different intervals in each year. Results show that the expansion of Xuzhou city can be divided into two intervals with the year 1994 as the demarcation line. From 1979 to 1994, the main expansion direction went southwest and southeast. From and southwest. Its expanding speed in 1994--2000 is greater than that in 1979--1994.