Formalisation des spécifications de bases de données géographiques pour une meilleure compréhension des données

Conception of a geographical database like those produced by IGN relies on conceptual models which are completed by textual specifications. These specifications contain much information related to the domain's semantics, and to the experts' knowledge about data acquisition. So we wish to extend the conceptual models with these specifications. To this end, we use the specifications to build an ontology of the domain (domain of the geographical entities) and then link this ontology to the databases' schemas. Semantical enrichment of the databases' conceptual models with an ontology built from the specifications seems to us a good way to better data interpretation. Our goal is to eventually use this for the integration of several databases. MOTS-CLÉS : BD géographiques, spécifications, ontologie, modélisation, terrain conceptualisé