Ontologie pour l'intégration de données d'observation de la Terre et contextuelles basée sur les relations topologiques

Nous proposons une ontologie pour l'integration de donnees d'observation de la Terre et de donnes contextuelles, a l'aide de relations topologiques spatiales et temporelles. Cette ontologie specialise des standards, notamment SOSA, GeoSPARQL et OWL-Time. La base de connaissance decrite par cette ontologie est alimentee grâce a un processus qui selectionne, transforme et integre de donnees geospatiales heterogenes (meta-donnees d'image satellite, donnees meteorologiques, unites administratives, couverture terrestre, etc.). Ce processus s'appuie sur le tuilage des images pour traiter les donnees ayant une composante spatiale fixe, alors que les relations temporelles sont calculees a la volee a partir d'une topologie temporelle. Nous validons cette approche par un cas d'etude exploitant des meta-donnees d'image satellite Sentinel.

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