A Rule-Based Approach to Monitoring Moving Objects

In modern GIS applications the control of complex systems dealing with mobile objects gains more and more importance, as for example in the area of airspace monitoring, traffic monitoring on street networks, or location-based services. The logging of individual physical events, such as changes of the current position or vehicles passing a monitoring camera, results in a large amount of data, thus requiring the support of a data base management system. In this context the capability to validate observed events and to provide an ’intelligent’ reaction to the occurrence of specific relevant situations becomes essential. For these tasks active and deductive rule techniques seem to be particularly well suited. This paper aims at examining the interaction between active and deductive rules in the context of monitoring moving objects using a DBMS.