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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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Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-01041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Conceptual, spatial and temporal referencing of multimedia objects / Christopher B. Jones (12/08/1996)

Public contenu dans Advances in GIS Research 2 : proceedings SDH'96, Volume 1. Proceedings of the 7th International symposium on spatial data handling SDH'96 / Menno-Jan Kraak (1996) Titre : Conceptual, spatial and temporal referencing of multimedia objects Type de document : Article/Communication Auteurs : Christopher B. Jones, Auteur ; C. Taylor, Auteur ; D. Tudhope, Auteur ; P. Beynon-Davies, Auteur Editeur : Delhi, Washington, Delft... : International Geographical Union IGU Année de publication : 12/08/1996 Conférence : SDH 1996, 7th International symposium on spatial data handling 12/08/1996 16/08/1996 Delft Pays-Bas Importance : 12 p. Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] données localisées [Termes IGN] données spatiotemporelles [Termes IGN] information géographique [Termes IGN] information sémantique [Termes IGN] modélisation [Termes IGN] multimedia [Termes IGN] proximité sémantique [Termes IGN] requête spatiale [Termes IGN] réseau sémantique [Termes IGN] système d'information géographique Résumé : (Auteur) The increasing usage in GIS of multimedia objects, such as scanned photographs and video recordings, has introduced the need to provide flexible indexing methods to help in accessing objects that may be of relevance to a range of possible applications. An experimental system is described in which media objects may be referenced to several classifications concepts, as well as qualitative descriptions of geographic location and time period. Semantic modelling techniques are used to create semantic networks that represent the hierarchical and lattice structures of conceptual, temporal and geographic space. The associated query methods enable inexact matching between user interests and the media object descriptors. Several metrics of semantic closeness, in concept, time and geography have been developped, based on scaled measures of path lengths within the semantic networks that represent the three dimensions of indexing. Numéro de notice : C1996-022 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65641