基于地理国情监测的建成区扩张分析研究

Research on Expansion Analysis of Urban Built-up Areas Based on Geographical Conditions Monitoring

以2015年、2016年和2017年南京江北新区地理国情数据为参考数据,基于高分辨率遥感影像,提取了2015年、2016年和2017年的城市建成区范围。结果表明:(1)江北新区成立前后城市建成区扩张明显,主要集中在北、东北和西南方向;(2)其他方向扩张不明显,且城市边界趋于复杂化;(3)城市紧凑度较低,合理的城市布局有待完善。在新区建成区空间格局分析的基础上,揭示其内在动力,为地理国情监测在城镇化发展研究方面的应用提供参考。

Taking geographical conditions monitoring data in Nanjing Jiangbei New Area in 2015,2016 and 2017 as the reference data,based on the highresolution remote sensing images,we extracted the boundaries of urban built-up areas in 2015,2016 and 2017.The results show that ① the urban built-up area is significantly expanded after the establishment of Jiangbei New Area,which is mainly located in the north,northeast and southwest direction.② The expansions in other direction are not obvious,while the urban boundary is tend to complicated.③ The urban compactness is low,so the rational layout of city needs to be improved.Though the analysis of the development trend of new area,it reveals its intrinsic motivation,which can provide a method reference for the applications of geographical situation monitoring in the research of urbanization development.