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Multidimensional visualisation of degrees of relevance of geographic data / G. Hobona in International journal of geographical information science IJGIS, vol 20 n° 5 (may 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 5 (may 2006) . - pp 469 - 490 Titre : Multidimensional visualisation of degrees of relevance of geographic data Type de document : Article/Communication Auteurs : G. Hobona, Auteur ; Philip James, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 469 - 490 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] données localisées [Termes IGN] données satellite [Termes IGN] infrastructure mondiale des données localisées [Termes IGN] internet [Termes IGN] logiciel de navigation [Termes IGN] métadonnées géographiques [Termes IGN] ontologie [Termes IGN] pertinence [Termes IGN] recherche d'information géographique [Termes IGN] visualisation 3D Résumé : (Auteur) The ever-increasing number of spatial data sets accessible through spatial data clearinghouses continues to make geographic information retrieval and spatial data discovery major challenges. Such challenges have been addressed in the discipline of Information Retrieval through ranking of data according to inferred degrees of relevance. Spatial data, however, present an additional challenge as they are characteristically made up of geometry, attribute and, optionally, temporal components. As these components are mutually independent of one another, this paper suggests that they be ranked independently of one another. The representation of the results of the independent ranking of these three components of spatial data suggests that representation of the results of the ranking process requires an alternative approach to currently used textual ranked lists: visualisation of relevance in a three-dimensional visualisation environment. To illustrate the possible application of such an approach, a prototype browser is presented. Numéro de notice : A2006-172 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810600607634 En ligne : https://doi.org/10.1080/13658810600607634 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27899 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06051	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06052	RAB	Revue	Centre de documentation	En réserve L003	Disponible

On the integration of object-based models and field-based models in GIS / K. Kjenstad in International journal of geographical information science IJGIS, vol 20 n° 5 (may 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 5 (may 2006) . - pp 491 - 509 Titre : On the integration of object-based models and field-based models in GIS Type de document : Article/Communication Auteurs : K. Kjenstad, Auteur Année de publication : 2006 Article en page(s) : pp 491 - 509 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] classificateur paramétrique [Termes IGN] modèle conceptuel de données localisées [Termes IGN] modèle orienté objet [Termes IGN] système d'information géographique [Termes IGN] UML Résumé : (Auteur) This paper proposes a common base-model for the classical object-based and field-based conceptual models in GIS. The model, which is called the PGOModel or 'Parameterized Geographic Object Model', is given a formal definition by using the UML modelling language. Within the scope of the paper, it has been shown that the PGOModel encompasses the classical object-based and field-based models. Two extensive examples demonstrate the application of the PGO model. The PGOModel seems ontologically well founded, except for the so-called PGOAtom concept. Numéro de notice : A2006-173 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600607329 En ligne : https://doi.org/10.1080/13658810600607329 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27900 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06051	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06052	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A multiangular object-oriented framework supporting spatio-temporal granularity conversions / Elena Camossi in International journal of geographical information science IJGIS, vol 20 n° 5 (may 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 5 (may 2006) . - pp 511 - 534 Titre : A multiangular object-oriented framework supporting spatio-temporal granularity conversions Type de document : Article/Communication Auteurs : Elena Camossi, Auteur ; Michela Bertolotto, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 511 - 534 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] dimension temporelle [Termes IGN] données 4D [Termes IGN] données spatiotemporelles [Termes IGN] granularité (informatique) [Termes IGN] granularité d'image [Termes IGN] modèle orienté objet [Termes IGN] système d'information géographique Résumé : (Auteur) Several application domains require handling spatio-temporal data. However, traditional Geographic Information Systems (GIS) and database models do not adequately support temporal aspects of spatial data. A crucial issue relates to the choice of the appropriate granularity. Unfortunately, while a formalisation of the concept of temporal granularity has been proposed and widely adopted, no consensus exists on the notion of spatial granularity. In this paper, we address these open problems, by proposing a formal definition of spatial granularity and by designing a spatio-temporal framework for the management of spatial and temporal information at different granularities. We present a spatio-temporal extension of the ODMG type system with specific types for defining multi-granular spatio-temporal properties. Granularity conversion functions are introduced to obtain attributes values at different spatial and temporal granularities. Numéro de notice : A2006-174 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600607451 En ligne : https://doi.org/10.1080/13658810600607451 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27901 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06051	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06052	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Deriving ground surface digital elevation models from Lidar data with geostatistics / C.D. Lloyd in International journal of geographical information science IJGIS, vol 20 n° 5 (may 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 5 (may 2006) . - pp 535 - 563 Titre : Deriving ground surface digital elevation models from Lidar data with geostatistics Type de document : Article/Communication Auteurs : C.D. Lloyd, Auteur ; P.M. Atkinson, Auteur Année de publication : 2006 Article en page(s) : pp 535 - 563 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] données lidar [Termes IGN] géostatistique [Termes IGN] interpolation inversement proportionnelle à la distance [Termes IGN] krigeage [Termes IGN] lissage de données [Termes IGN] modèle numérique de surface [Termes IGN] modèle numérique de terrain [Termes IGN] surface du sol Résumé : (Auteur) This paper focuses on two common problems encountered when using Light Detection And Ranging (LiDAR) data to derive digital elevation models (DEMs). Firstly, LiDAR measurements are obtained in an irregular configuration and on a point, rather than a pixel, basis. There is usually a need to interpolate from these point data to a regular grid so it is necessary to identify the approaches that make best use of the sample data to derive the most accurate DEM possible. Secondly, raw LiDAR data contain information on above-surface features such as vegetation and buildings. It is often the desire to (digitally) remove these features and predict the surface elevations beneath them, thereby obtaining a DEM that does not contain any above-surface features. This paper explores the use of geostatistical approaches for prediction in this situation. The approaches used are inverse distance weighting (IDW), ordinary kriging (OK) and kriging with a trend model (KT). It is concluded that, for the case studies presented, OK offers greater accuracy of prediction than IDW while KT demonstrates benefits over OK. The absolute differences are not large, but to make the most of the high quality LiDAR data KT seems the most appropriate technique in this case. Numéro de notice : A2006-175 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810600607337 En ligne : https://doi.org/10.1080/13658810600607337 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27902 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06051	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06052	RAB	Revue	Centre de documentation	En réserve L003	Disponible

GIS-based DSS for priority setting in humanitarian mine-action / S. Knezic in International journal of geographical information science IJGIS, vol 20 n° 5 (may 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 5 (may 2006) . - pp 565 - 588 Titre : GIS-based DSS for priority setting in humanitarian mine-action Type de document : Article/Communication Auteurs : S. Knezic, Auteur ; N. Mladineo, Auteur Année de publication : 2006 Article en page(s) : pp 565 - 588 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] analyse multicritère [Termes IGN] impact sur l'environnement [Termes IGN] outil d'aide à la décision [Termes IGN] risque majeur [Termes IGN] système d'information géographique Résumé : (Auteur) Mine contamination is one of the main obstacles to economic recovery and other types of progress in mine-affected countries. Therefore, the primary goal of humanitarian demining operations is to clear all suspected minefields and restore them so as to make them available for their previous use. The customary financial shortfall results in the need for priority setting in the mine removal process. This paper describes and investigates a new approach to priority setting within mine action, with the introduction of a hierarchic GIS-based decision support system (DSS). The proposed DSS is aimed at determining the objective priorities required to reduce the risks stemming from mine contamination. DSS is based on a combination of GIS analysis and a multicriteria method in order to enable efficacious mine action management, namely setting humanitarian demining priorities in order to optimally reduce the risk caused by mines. GIS is outlined as a powerful tool for the generation of aggregated information used in multicriteria analysis, as is the link between hierarchic decision levels in the proposed DSS. The results of a demonstration of the proposed GIS-based DSS on mine-affected water resources in Croatia are supplied. Numéro de notice : A2006-176 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810600607303 En ligne : https://doi.org/10.1080/13658810600607303 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27903 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06051	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06052	RAB	Revue	Centre de documentation	En réserve L003	Disponible