基于夜光数据的滇中城市建成区动态监测与时空格局演变
林之强1,2, 彭双云1,2, 洪 亮1,2, 许泉立1,2, 周燕莲1

(1.云南师范大学 旅游与地理科学学院, 昆明 650500; 2.云南省地理空间信息技术工程技术研究中心, 昆明 650500)

夜间灯光遥感; 滇中城市群; DMSP/OLS; 城市扩张; 时空分析

Dynamic Monitoring and Spatial-Temporal Pattern Evolution of Built-up Areas in Central Yunnan Based on Nighttime Light Data
LIN Zhiqiang1,2, PENG Shuangyun1,2, HONG Liang1,2, XU Quanli1,2, ZHOU Yanlian1

(1.College of Tourism and Geography, Yunnan Normal University, Kunming 650500, China; 2.Yunnan Geospatial Information Technology Engineering Technology Research Center, Kunming 650500, China)

night light remote sensing; central Yunnan urban agglomeration; DMSP/OLS; urban expansion; space-time analysis

备注

及时、准确地获取城市群各城市建成区空间信息,监测城市扩张时空变化,对于土地利用方式优化、生态文明建设具有重大意义。基于DMSP/OLS夜间灯光遥感数据,采用“基于统计数据的比较法”,提取1993—2013年滇中城市群的建成区信息,探索20年间滇中城市群建成区的空间格局动态变化。结果 表明:(1)20年间,滇中城市群逐渐形成以昆明市为中心的“中心放射状”集聚形态。(2)滇中城市建成区面积在1993—2013年增长了8倍,特别是昆明市建成区的增长尤为显著。(3)不同城市、不同阶段扩张速度与扩张强度存在明显差异:2003年之前,滇中城市处于缓慢增长阶段,2003年之后进入快速增长阶段,2008年之后则增速变缓但呈稳定快速增长趋势。20年间滇中城市群的扩张强度总体上呈现出“先降低—后升高—再降低”的趋势。

Timely and accurate acquisition of spatial information of urban built-up areas in urban agglomerations and monitoring of the spatiotemporal changes of urban expansion are of great significance to the optimization of land use methods and the construction of ecological civilization. Based on the DMSP/OLS night light remote sensing data and the comparison method based on statistical data, the built-up area information of central Yunnan urban agglomeration from 1993 to 2013 was extracted to explore the dynamic changes of the spatial pattern of the built-up area of central Yunnan urban agglomeration during the 20 years. The results show that:(1)in the past 20 years, the central Yunnan urban agglomeration had gradually formed a central radial cluster form centered on Kunming;(2)the area of urban built-up areas in central Yunnan had increased 8-fold from 1993 to 2013, especially the growth of built-up areas in Kunming;(3)there were obvious differences between different cities and different stages of expansion speed and expansion intensity: Before 2003, cities in central Yunnan were in a stage of slow growth trend. In the past 20 years, the expansion intensity of central Yunnan urban agglomeration had shown a trend of decreasing first—then increasing—then decreasing.