A hierarchical graph-based accessibility measure: application to a maritime transportation network

Hierarchical graph-based approaches provide valuable abstractions for studying the topological structures that emerge and a better understanding of mobility patterns at complementary spatial and temporal scales. This research introduces a hierarchical graph-based model to represent and analyse a maritime transportation network at several spatio-temporal and semantic levels, as well as a new hierarchical extension of an accessibility measure. The proposed model is implemented in a graph database using maritime mobility data. The peculiarities of the hierarchical accessibility are computationally evaluated in comparison with non-hierarchical approaches.