Modeling spatiotemporal topological relationships between moving object trajectories along road networks based on region connection calculus |
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| Authors: | Linbing Ma Jing Wu Qiliang Liu |
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| Institution: | 1. School of Geography and Planning, Sun Yat-Sen University, Guangzhou, China;2. Department of Geo-Informatics, Central South University, Changsha, China |
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| Abstract: | Considering the attempts to model spatiotemporal topological relationships between moving object trajectories, the conceptual and computational framework for moving objects along a road network has not received much attention. This paper aims to draw an improved model based on Region Connection Calculus (RCC) theory to represent the spatiotemporal topological relationships between moving object trajectories along road networks. This paper first uses a dimension reduction method based on a linear-reference transformation to model the moving object trajectories segments, and then defines new time–connection and space–connection relations between two trajectory segments. On this basis, the paper proposes an extension to the RCC-based spatiotemporal binary relationship set so that the combined semantics of the spatiotemporal predicates can be described completely. A case study was carried out using Floating Car Data in Guangzhou city. The computational results show that in a real application, the occurrence frequencies of the RCC-based binary relationships are distributed nonuniformly and the semantics of some binary relationships with the highest occurrence are coarse. Therefore, the partition of the spatiotemporal connection relations and the finer aspects of the spatiotemporal relationship model may require further research work. |
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| Keywords: | Moving objects trajectories spatiotemporal topological relationship region connection calculus |
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