Research On The Method Of Defining Logistics Park Hinterland

Focusing on the phenomenon of the idle logistics parks as well as the serious waste of resources caused by the problem of the excessive numbers and huge scale in the construction of logistics parks in China presently, this paper proposes a more scientific method to determine the reasonable scale for logistics parks, that is to say the logistics park hinterland should be defined precisely at the early stage of logistics park planning.By the analysis of the meanings and characteristics of the logistics park hinterland, and based on the traditional model-P. D. Converse’s breaking point theory in urban geography, the Voronoi diagram theory in computational geometry is introduced into this paper to research on the definition method of the logistics park hinterland. By integration of the respective advantages of those two theoretical models and comparative analysis of the limitations of ordinary Voronoi diagram, weighted Voronoi diagram and Voronoi diagram based transportation network in the practical application, weighted Voronoi diagram based on transportation network model is created to define the scope of the logistics park hinterland. On the basis of the crystal growth algorithm, C#programming language is utilized to generate the program of the weighted Voronoi diagram based on transportation network which can directly load the exact geographical information files of GIS software. Subsequently, based on the analysis and summary of the three factors which influence the logistics park centrality, the indicators system is constructed to assess the logistics park centrality, the square root of which is the weight factor in the weighted Voronoi diagram based on transportation network. Then SPSS software is used to determine the weights in Voronoi diagram based on transportation network model on the basis of principal component analysis. Finally, this theoretical model is applied to the example of "Four Center" in Chengdu.Practices proves that this method not only overcomes the shortcomings existing in the traditional methods such as gravity model, potential model and breaking-point model, which makes the definition of the logistics park hinterland more scientific and rational, but also it further improves and enriches the Voronoi diagram theory as well as expands its application scope to some extent and distinguishes its high application value.