Prototype of a knowledge-based temporal GIS for
the concurrent monitoring of ships.
Enseigne de vaisseau Frédéric Barbe
Enseigne de vaisseau François Gélébart
Intelligent Simulation and Modelling Research Group (Prof. A Bargiela)
Dr Claramunt, ISM-NTU and Dr Degogele French Navy College
This project integrates different analysis and development
tasks that together supports the implementation of the MAGELLAN prototype. First,
a conceptual database model has been designed. This conceptual analysis takes into
account geographical and dynamic properties related to the maritime domain:
- Successive locations of ships are integrated within their
- The displacements of each ship are related to other ships
displacements in order to avoid collisions.
The Brest region (France) basic numeric map.
The data integration process is based on data provided by the 'Service Hydrographique
et Océanographique de la Marine'. This data has been integrated within an
existing GIS software (Arcview). This maritime data is related to two different test
regions that support the development of a realistic demonstration. The structure of
these data has been adapted to our specific purpose, particularly by the calculation
of Thiessen polygons.
Thiessen polygons applied on the Brest region (France) map.
An important property of Magellan is the management of dynamical data,
which has been performed thanks to adequate logical and physical database models.
Finally, the implementation of the system fulfils four major specifications:
- the software structure is modular,
- the computational processes implemented are adapted to other
- the calculation duration is acceptable,
- the prototype provides a user-oriented interface.
The final prototype can be considered as an extension of an existing GIS, that
simulates ships routes in relation with both geographic and dynamic data. This system
calculates an expected future situation from initial conditions. Our project demonstrates
the potential of GIS for prescriptive systems in maritime domain.
A simulation of 15 min that deals with 3 ships in the region of
Several future improvements of Magellan can be suggested.
One interesting development is the integration of a process of GPS an Radar data
acquisition, which will allow the display of real-time data and the simulation of
ships displacements from real situations. The realism of the simulation can also be
increased by allowing the user to define additional ships routes. As such, the user
knowledge of the situation can be taken in account. Another future development is the
adaptation of the interface to the learning of anti-collision manÅ“uvres by integrating a
visual comparison between real and relative routes and by allowing users to analyse
the impact of their manÅ“uvres.
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Last update: 5/10/99