Source: adapted from Notteboom, T. and J-P Rodrigue (2007) "Re-assessing Port-Hinterland Relationships in the Context of Global Supply Chains", in J. Wang et al. (eds) Inserting Port-Cities in Global Supply Chains, London: Ashgate.
- The locational layer relates to the geographical location of a port in relation to the central places in the economic space and forms a basic element for the intrinsic accessibility of a seaport, which can be a central place or an intermediate location within transport chains. A good intermediate location can imply a location near the main maritime routes such as offshore hubs (e.g. Singapore, Mediterranean load center ports such as Marsaxlokk and Gioia Tauro) and/or near production and consumption centers such as gateway ports (e.g. Rotterdam, New York, Santos). For gateway ports, a good location is a necessary condition for attaining a high intrinsic accessibility to a vast hinterland, which often builds upon the centrality of the port region. It becomes a sufficient condition when the favorable geographical location is valorized by means of the provision of efficient infrastructures and transport services.
- The infrastructural layer involves the provision and exploitation of basic infrastructure for both links and nodes in the transport system. Containerization and intermodal transportation, particularly the transshipment infrastructures they rely on, have contributed to a significant accumulation of infrastructures in a number of ports. This is where the intrinsic accessibility is valorized since a port site has little meaning unless capital investment is provided.
- The transport layer involves the operation of transport services on links and corridors between the port and other nodes within the multimodal transport system and the transshipment operations in the nodes of the system. It is a matter of volume and capacity.
- The logistical layer involves the organization of transport chains and their integration in logistical chains, namely port-centric logistics. This layer is mostly managerial with a decision making process in terms of the allocation of modes and the booking of transshipment facilities.