The qualitative trajectory calculus on networks
Peter Van Bogaert, Nico Van de Weghe, Anthony G. Cohn, Frank Witlox, Philippe De Maeyer · 2007
Abstract. Moving objects are commonly handled using quantitative methods and information. However, in many cases, qualitative information can be more efficient and more meaningful than quantitative information. A lot of research has been done in generating, indexing, modelling and querying network-based moving objects, but little work has been done in building a calculus of relations between these objects in a qualitative way. In this paper, we introduce a formal definition of how to represent and reason about the relative trajectories of pairs of objects moving along a network. 1