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Thinking about Space‐Time Connections: Spatiotemporal Scheduling of Individual Activities
Author(s) -
Stewart Kathleen,
Fan Junchuan,
White Emily
Publication year - 2013
Publication title -
transactions in gis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 63
eISSN - 1467-9671
pISSN - 1361-1682
DOI - 10.1111/tgis.12028
Subject(s) - timeline , schedule , computer science , scheduling (production processes) , spacetime , plan (archaeology) , operations research , geography , operations management , engineering , physics , operating system , archaeology , quantum mechanics
This article presents a spatiotemporal model for scheduling applications that is driven by the events and activities individuals plan and manage every day. The framework is presented using an ontological approach where ontologies at different levels of generalization, e.g. domain, application, and task ontologies, are linked together through participation and inheritance relationships. S _ E vents are entered into a schedule as a new S _ E ntry , or modifications can be made to existing entries including reschedule , postpone , change location , and delete as schedules vary over time. These schedule updates are formalized through changes to planned start and end times and the planned locations of S _ E ntries are expressed using SWRL , a semantic web rule language. SWRL is also used for reasoning about schedule changes and the space‐time conflicts that can occur. The sequence of entries in a schedule gives rise to S _trajectories representing the locations that individuals plan to visit in order to carry out their schedule, adding an additional spatial element to the framework. A prototype G eoscheduler application maps S _ E ntries against a timeline, offering a spatiotemporal visualization of scheduled activities showing the evolution of a schedule over space‐time and affecting spatiotemporal accessibility for individuals.