An algebra for the spatio-temporal representation and manipulation of the semantics of mobile object trajectories
Une algèbre pour la représentation et la manipulation spatio-temporelle et sémantique des trajectoires d'objets mobiles
Résumé
Nowadays, the increasing development of positioning and
wireless communication technologies favors a better real-time integration
and manipulation of large spatial databases. This o ers many new
opportunities for the development of trajectory databases, but a number
of research challenges are still open as the generated information is
often unstructured, continuous, large and sometimes unpredictable. The
research presented in this paper develops a modeling approach that integrates
the semantic, spatial and temporal dimensions when representing
spatial trajectories at the abstract and logical levels. A data manipulation
language that supports the querying and analysis of large trajectory
databases is also proposed. The spatial database model is based on algebraic
data types, and a prototype is developed on top of the DBMS
PostgreSQL/PostGIS. The whole approach and the prototype development
have been experimented and applied to benchmark transportation
data derived from an origin-destination survey in the region of Quebec
in Canada.
Cette thèse propose un modèle de représentation de la sémantique de trajectoires d'objets mobiles. L'approche est illustrée par un prototype appliquée à une application d'origine-destination dans la ville de Québec au Canada.