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Voronoi-based region approximation for geographical information retrieval with gazetteers / H. Alani in International journal of geographical information science IJGIS, vol 15 n° 4 (june 2001)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 15 n° 4 (june 2001) . - pp 287 - 306 Titre : Voronoi-based region approximation for geographical information retrieval with gazetteers Type de document : Article/Communication Auteurs : H. Alani, Auteur ; Christopher B. Jones, Auteur ; D. Tudhope, Auteur Année de publication : 2001 Article en page(s) : pp 287 - 306 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] diagramme de Voronoï [Termes IGN] modèle sémantique de données [Termes IGN] recherche d'information géographique [Termes IGN] répertoire toponymique [Termes IGN] requête spatiale Résumé : (Auteur) Gazeteers and geographical thesauri can be regarded as parsimonious spatial models that associate geographical location with place names and encode some semantic relations between the names. They are of particular value in processing information retrieval requests in which the user employs place names to specify geographical context. Typically the geometric locational data in a gazetteer are confined to a simple footprint in the form of a centroid or a minimum bounding rectangle, both of which can be used to link to a map but are of limited value in determining spatial relationships. Here we describe a Voronoi diagram method for generating approximate regional extents from sets of centroids that are respectively inside and external to a region. The resulting approximations provide measures of areal extent and can be used to assist in answering geographical queries by evaluating spatial relationships such as distance, direction and common boundary length. Preliminary experimental evaluations of the method have been performed in the context of a semantic modelling system that combines the centroid data with hierarchical and adjacency relations between the associated place names. Numéro de notice : A2001-039 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810110038942 En ligne : https://doi.org/10.1080/13658810110038942 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21741 [article]

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