城市作为一个社会、经济和物质实体，对周围区域有着吸引和辐射影响，城市空间影响范围反映了一个城市的综合实力，是城市综合实力在地理空间上的体现。对城市空间影响范围的分析与划分，有利于明确城市间空间相互作用的状况，对研究城市的合理布局，促进区域社会主义市场经济的发展有重要的意义。通过选取反映城市综合实力的13项指标，经主成分分析后得到四川省21个城市的综合实力得分值作为权重，采用加权Voronoi图划分得到四川省主要城市的空间影响范围图。研究结果表明，利用加权Voronoi图能够较为真实地反映出四川省主要城市的空间影响范围，为城市规划和区域经济发展提供引导与决策服务。%As a social, economic and material entities, city has attractive and radiant influence on the surrounding area. The city’s affected coverage which reflects the comprehensive strength of a city is the embodiment of city’s comprehensive strength on the geographic space. It is not only advantageous to make clear spatial interaction situation among cities, also has important significance to the study on reasonable layout of city and promoting development of regional socialist market economic by analysing and dividing city’s affected coverage. Thirteen indicators which reflect the comprehensive strength of city are selected to calculate overall strength scores of the 21 cities in Sichuan Province by conducting principal component analysis. Using the obtained city overall strength scores as weights, major city’s affected coverage in Sichuan Province is divided by applying weighted Voronoi diagram. The result shows that using weighted Voronoi diagram can reflect relatively real city’s affected coverage in Sichuan Province. Moreover, the city’s affected coverage could provide guidance and decision-making service for urban planning and regional economic development.
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