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A framework to enhance semantic flexibility for analysis of distributed phenomena / J Mcintosh in International journal of geographical information science IJGIS, vol 19 n° 10 (november 2005)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 19 n° 10 (november 2005) . - pp 999 - 1018 Titre : A framework to enhance semantic flexibility for analysis of distributed phenomena Type de document : Article/Communication Auteurs : J Mcintosh, Auteur ; M. Yuan, Auteur Année de publication : 2005 Article en page(s) : pp 999 - 1018 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse d'image orientée objet [Termes IGN] analyse spatiale [Termes IGN] distribution spatiale [Termes IGN] données maillées [Termes IGN] données vectorielles [Termes IGN] information sémantique [Termes IGN] modèle conceptuel de données spatio-temporelles [Termes IGN] modèle logique de données [Termes IGN] problème des valeurs limites [Termes IGN] représentation des détails topographiques [Termes IGN] représentation multiple [Termes IGN] requête spatiotemporelle [Termes IGN] seuillage [Termes IGN] système d'information géographique [Termes IGN] variance Résumé : (Auteur) While some geographic phenomena hold uniform properties, such as land-use zones, many geographic phenomena are distributed such that their properties vary across an extended area. While such distributed phenomena are best represented as continuous surfaces, individual objects (or features) often emerge among clusters of high or low values in a field. For example, areas of relatively high elevation may be viewed as hills, while flat low-lying areas are perceived as plains in a terrain. A comprehensive spatial analysis of distributed phenomena should examine both the spatial variance of its attribute surfaces and the characteristics of individual objects embedded in the field. An immediate research challenge to meet such spatial analysis needs is that these emerging features often have vague boundaries that vary according to the use and the user. The nature, and even existence, of these objects depend upon the range of values, or thresholds, used to define them. We propose a representation framework that takes a dual raster-vector approach to capture both field- and object-like characteristics of distributed phenomena and maintain multiple representations of embedded features delineated by boundaries that are likely to be relevant for the expected uses of the data. We demonstrate how boundaries influence the analysis and understanding of spatiotemporal characteristics of distributed phenomena. Using precipitation as a proof of concept, we show how the proposed framework enhances semantic flexibility in spatiotemporal query and analysis of distributed phenomena in geographic information systems. Numéro de notice : A2005-496 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810500197652 En ligne : https://doi.org/10.1080/13658810500197652 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27632 [article]

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079-05091	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-05092	RAB	Revue	Centre de documentation	En réserve L003	Disponible