基于遥感技术的南宁市城市绿地动态监测

Dynamic Monitoring of Urban Green Space in Nanning City Based on Remote Sensing Technology

以南宁市中心城区(快环以内区域)为主要研究区域,采用面向对象分类方法对2009年和2015年的高分辨率遥感影像进行城市绿地信息提取,实现对南宁市城市绿地的动态监测。研究结果表明:从2009年-2015年,南宁市中心城区的绿地面积从21 482 hm^2减少到15 419 hm^2,绿地面积减少6 063 hm^2,呈现出从城区中心向快环方向缩减趋势。伴随着南宁市城市化进程的加快和经济的飞速发展,大量城市绿地转变为建设用地,需要采取相应措施有效保护城市绿地。

This paper takes Nanning center city within the express ring roads as the main study area,using object-oriented classification methods to extract the information of urban green space from high-definition remote sensing images in 2009 and 2015. Its goal is to realize the dynamic monitoring of the urban green space in Nanning. The results show that,the green areas in Nanning center city are reduced from 21 482 hm^2 to 15 419 hm^2,with a total reduction of 6 063 hm^2 from 2009 to 2015,while the coverage of green areas goes down from center city towards express rings roads. With the acceleration of urbanization and the rapid development of economy in Nanning,a large number of urban green space in Nanning has been transformed into the construction land. It is necessary to take some effective measures to protect the urban green space.