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Spatial Correlation Analytical Method of OD Flow in Freight Transport: a Case Study of China

Wei Wei,B. Mao,Shaokuan Chen,Xin-Miao Zhao,Yang-fan Zhou

Published 2016 in Unknown venue

ABSTRACT

Keyword: Origin-destination flow; Freight Transport; Spatial correlation; Spatial interaction Abstract: Commodity and information interaction between regions are becoming more and more intense. The data of origin-destination flow (OD flow) is the observation of the interaction between paired regions. Each observed value of OD flow is related to an original point and a destination point in space, which brings enormous challenge in the establishment of mathematical model. In spatial interaction models, it is usually supposed that there is a certain relation (often the linear) between regional interaction and special distance, which may result in the inconsistence between data characteristics and model hypotheses. Based on the general form of traditional spatial autocorrelation indicators, a novel indicator system consisting of global and local indicators of spatial correlation for the origin-destination flow (OD flow) is proposed in this paper, and further the corresponding Z tests for the significance judgment are also derived under the null hypotheses of spatial uniformity and normal distribution. Finally, the feasibility and effectiveness of the proposed methodology are demonstrated by case studies of the railway freight exchange flows in Chinese mainland 2004. Through the proposed method, nodes in the freight transport network are classified to four types: global point, local point, generation point and attraction point.

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