夜光遥感支持下的河南省城市规模结构演变

Exploring Urban Scale Structure Evolution in Henan Province Using Nighttime Light Remote Sensing

采用一种新的方法将NPP/VIIRS模拟为DMSP/OLS数据,构建1992—2018年河南省长期一致性夜间灯光数据集,运用夜间灯光统计、标准差椭圆和位序-规模法则等方法进行系统性分析。结果表明:灯光数据相关性由0.62提升至0.93,一致性有所改善;河南省各市灯光总规模和平均亮度均显著增长,南部区域灯光总量增加较多,中北部平均发展更好,西南地区灯光聚集度偏高;全省范围内灯光空间分布呈扩展趋势,空间增长率为21.33%,呈东北-西南走向,城市重心始终分布于几何中心北方,且逐步向东南方向转移但总体移动速度逐渐变缓;河南省城市正在形成较为合理的位序规模体系,在2000年前后城市规模分布分别呈现趋于分散和集中的趋势,存在高位序城市集聚效应不够突出,辐射带动能力偏弱的问题。

A new method was adopted to simulate NPP/VIIRS as DMSP/OLS data to construct a long-term consistent night light data set of Henan Province from 1992 to 2018,and the analysis was carried out using night light statistics,standard deviation ellipse,and rank-size rules analysis. The results show that the data correlation has been increased from 0. 62 to 0. 93,and the consistency has been improved;The total scale and average brightness of lights in all cities in Henan province increase significantly. The total amount of light increases more in the southern region,the average development of the north and central region is better,and the intensity of light aggregation is higher in the southwest region. The spatial distribution of lights in the whole province shows an expanding trend,with a spatial growth rate of 21. 33% and a northeast to southwest trend. The urban center of gravity is always distributed in the north of the geometric center,gradually shifting to the southeast,but the overall moving speed is gradually slowing down;the urban development of Henan Province conforms to the ranksize rule,the regional city scale distribution tended to be scattered before 2000 years and concentrated 2000 years later. There is a problem that the development of high-ranking cities is not prominent enough and the ability to drive radiation is weak.