Temporal Constraints Between Cyclic Geographic Events Jorge Campos 1,2 and Kathlenn Hornsby 2 {jorge,khornsby}@spatial.maine.edu 1 Núcleo de Pesquisa em Rede de Computadores Universidade Salvador (Unifacs) 2 National Center for Geographic Information and Analysis and Department of Spatial Information Science and Engineering University of Maine
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Temporal Constraints Between Cyclic Geographic Events Jorge Campos 1,2 and Kathlenn Hornsby 2 {jorge,khornsby}@spatial.maine.edu 1 Núcleo de Pesquisa em.
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Temporal Constraints Between Cyclic Geographic Events
Jorge Campos1,2 and Kathlenn Hornsby2
{jorge,khornsby}@spatial.maine.edu
1 Núcleo de Pesquisa em Rede de Computadores Universidade Salvador (Unifacs)2 National Center for Geographic Information and Analysis and Department of Spatial Information Science and Engineering University of Maine
Outline
•Temporal Characteristics of Events
•Temporal Constraints Between Intervals
•A Temporal Model for Cyclic Events
•Cyclic Temporal Constraints
Events
Events are abstractions that represent phenomena, activities, and processes of the real world.
Temporal Characteristics of Events:
Evi=(Si,Ei)
Convex intervals as the temporal construct representingthe time when event is true or is happening
Temporal Constraints
Temporal Constraints specify values (or range of values) to the intervals’ endpoints