DMSP/OLS夜间灯光数据提取城镇化信息研究进展

Review on Extracting Urbanization Information from DMSP/OLS Nighttime Light Data

分析了多时相DMSP/OLS夜间灯光数据的特征,从内部相对校正和年际间校正两个方面对当前夜间灯光数据的主要校正方法进行归纳总结。从指数法、阈值法和像元分类法三个方面重点介绍了多时相夜间灯光数据提取城镇化信息的方法,并探讨了夜间灯光数据对城镇化的拟合效果及其影响因素。夜间灯光数据对城镇化信息表征的量化反应是随研究区域的自然环境及社会经济发展状况不同而不同的,此外还受到夜间灯光数据校正方法的影响。因此,完善校正方法、结合其他数据源、从多角度提取城镇化信息是今后多时相DMSP/OLS夜间灯光数据的一个研究热点。

This paper analyzes the characteristics of the multi-temporal DMSP/OLS nighttime light data.The main correction methods for current nighttime light data are summarized based on inter-calibration and annual calibration.The extraction of urbanization information based on multi-temporal nighttime light data was especially discussed from three aspects of index methods,threshold methods and pixel classification methods.The fitting effect of nighttime light data on urbanization and its influencing factors were discussed.The quantitative response of nighttime light data to urbanization information representation varies with the natural environment and socio-economic development status of the study area,and is also affected by the calibration methods of nighttime light data.Therefore,perfecting the calibration method,combining with other data sources,and characterizing urbanization information from multiple perspectives is a research hotspot for multi-temporal DMSP/OLS nighttime light data.