基于遥感的江苏省城市规模分布定量化研究

基于江苏省1979、1985、1995和2000年的遥感影像,提取了13个地级市的城市用地面积数据,以此为依据,采用城市首位度、分维数、帕雷托指数、城市规模基尼系数等对江苏省的城市规模分布及其变化进行了分区研究。结果显示,江苏省13个城市规模分布符合位序规模法则,拟合曲线的判定系数都在0.884以上;江苏省首位城市发展较强,大规模城市发展迅速,城市规模分布分散,但有微弱的集中趋势;经分析分维数D、不平衡指数可得,江苏省城市的用地规模分布不均衡且这种不均衡趋于增强,规模增长速度趋于下降;江苏省城市建成区用地的位序-规模曲线呈现出平行向前推进的特点。这些研究结果可为预测江苏省13个城市未来建成区用地规模和城市体系的未来发展提供科学依据。

Quantitative Study on City Size Distribution in Jiangsu Province Based on Remote Sensing

Based on the remote sensing images of 1979,1985,1995 and 2000,the built-up area of the 13 prefecture-level cities of Jiangsu Province were obtained.Based on these data,the urban primary indexes,fractal dimension and Gini coefficient were used to study the city size distribution and variation.The results indicated that rank-size law of 13 cities was approved based on urban land-use,which referred to city size,and the coefficient of determination(R2) were all more than 0.884.The primary city in Jiangsu Province developed very quickly,large-scale urban developed rapidly;city-size distribution was scattered,but there was weak central tendency.According to the analysis of fractal dimension D and the unbalanced index,we can draw the conclusion that the distribution of land size was uneven and the trend enhanced gradually,but the increasing speed reduced gradually.The rank-size distribution curve of Jiangsu built-up areas presented a parallel evolution manner.These results can provided a scientific basis for predicting the 13 cities built-up areas and urban land-scale systems in the future development of Jiangsu Province.