Definition of Urban Hinterlands of Chengdu-Chongqing Economic Circle Based onWeighted Voronoi Diagram

  • Key Laboratory of Eco-environments in Three Gorges Reservoir Region Ministry of Education, School of Geographical Sciences, Southwest University, Chongqing 400715, China

Received date: 2013-09-17

  Revised date: 2013-10-20

  Online published: 2014-05-10


Among the influencing factors of regional resources integration and coordinated development, a reasonable division of city hinterland plays a key role. Based on the weighted Voronoi diagram, we put urban centricity intensity and comprehensive transportation accessibility as the weights into the breaking point model, and then revised the urban population scale in the model. As such we constructed a new urban hinterland definition model based on the weighted Voronoi model. To verify this new model, we took 36 central cities in Chengdu-Chongqing Economic Circle as an example to do a test. The result shows that, in our test area, the hinterland extent of each city does not match the administrative region extent well. To make it clearer, we divided these cities into three categories according to the ratio of the hinterland size and the administrative region size of each city. Cities, whose ratio is greater than 100%, have good conditions of hinterland outward extending and have great influence on the development of the surrounding cities. When the ratio is smaller than 60%, it indicates that the influence of the surrounding cities is much stronger than that of the central city itself. Once the ratio is between 60% and 100%, the central cities make little sense to the development of the surrounding cities. Furthermore, Chengdu City of Sichuan Province and Chongqing Municipality are both well-known as the most powerful cities in this region, however, their hinterland extents are not the biggest of all the hinterlands in the region. This phenomenon shows that the extent and size of a city hinterland is not completely positively related to its comprehensive strength, and it should be defined by the comprehensive strength of both the central city and the surrounding cities. Finally, this article completes a redefinition of city hinterland for each city in Chengdu-Chongqing Economic Circle, and it is expected to afford a certain reference to the future urban construction and city planning.

Cite this article

GUO Limin, ZHOU Tinggang, SU Yingchun . Definition of Urban Hinterlands of Chengdu-Chongqing Economic Circle Based onWeighted Voronoi Diagram[J]. Journal of Geo-information Science, 2014 , 16(3) : 411 -417 . DOI: 10.3724/SP.J.1047.2014.00411


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