基于路网的江苏城市空间相互作用测度

The measurement of spatial interaction among cities in Jiangsu province based on highway network

道路交通的通达性是城市空间相互作用和经济联系的重要前提,结合G IS技术的网络分析和空间分析功能在对江苏省公路交通网络可达性定量评价的基础上,采用引力、潜力和场强模型对13个地级市的空间相互作用程度、城市潜力值和城市的辐射场强进行定量测度和比较分析;研究发现苏南地区城市间相互作用较强,城市对外相互作用潜力大、辐射带动作用强度高;最后对影响江苏省城市空间相互作用强度的因素进行简要分析.

The accessibility of the highway network plays an important role in the process of spatial interaction among cities. First of all, the highway network accessibility in Jiangsu province is evaluated by the network analysis and spatial analysis functions of GIS. Then, based on gravity model,potential theory model and field spread model, the spatial interaction level among 13 cities is calculated, the potential value and the spread strength are measured. Through study, we find that the interaction among cities, the potential value and the spread strength of cities in southern zones in Jiangsu province are stronger than the other. Finally, the factors which effect the spatial interaction strength is analyzed briefly.