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Using uncertain conceptual spaces to translate between land cover categories / O. Ahlqvist in International journal of geographical information science IJGIS, vol 19 n° 7 (august 2005)
[article]
Titre : Using uncertain conceptual spaces to translate between land cover categories Type de document : Article/Communication Auteurs : O. Ahlqvist, Auteur Année de publication : 2005 Article en page(s) : pp 831 - 857 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse comparative
[Termes IGN] analyse spatiale
[Termes IGN] base de données cartographiques
[Termes IGN] base de données d'occupation du sol
[Termes IGN] carte d'occupation du sol
[Termes IGN] Corine Land Cover
[Termes IGN] incertitude des données
[Termes IGN] interopérabilité sémantique
[Termes IGN] modèle sémantique de données
[Termes IGN] occupation du sol
[Termes IGN] référentiel sémantique
[Termes IGN] sous ensemble flouRésumé : (Auteur) To support diversified uses of geographical information there is a need for enhanced spatial data infrastructures to create interoperability between users and producers of geographic data. One important interoperability problem is caused by differences in data semantics, for example heterogeneous land use/land cover classification systems. A critical review of an existing method for semantic interoperability between land cover classifications is used to motivate and introduce a modified framework based on conceptual spaces and rough fuzzy sets. Land cover categories are defined by a set of defining attributes formally represented as a collection of rough fuzzy membership functions and importance weights. This parameterized representation is used to translate between the US Natural Vegetation Classification Standard and the European CORINE Land Cover system based on evaluations of different aspects of semantic similarity between categories. The results demonstrate that the use of different similarity metrics in a conceptual space, together with the explicit rough fuzzy uncertainty representation, increases the semantic separation between land cover categories. Diagrams and maps illustrate the information that can be gained from the semantic similarity assessment. These developments open new possibilities to explore semantic relationships between concepts, both within a classification and between classifications used in different contexts. Numéro de notice : A2005-357 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810500106729 En ligne : https://doi.org/10.1080/13658810500106729 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27493
in International journal of geographical information science IJGIS > vol 19 n° 7 (august 2005) . - pp 831 - 857[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-05071 RAB Revue Centre de documentation En réserve L003 Disponible 079-05072 RAB Revue Centre de documentation En réserve L003 Disponible Complexity metrics to quantify semantic accuracy in segmented Landsat images / Alfred Stein in International Journal of Remote Sensing IJRS, vol 26 n° 14 (July 2005)
[article]
Titre : Complexity metrics to quantify semantic accuracy in segmented Landsat images Type de document : Article/Communication Auteurs : Alfred Stein, Auteur ; K. De Beurs, Auteur Année de publication : 2005 Article en page(s) : pp 2937 - 2951 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] agriculture
[Termes IGN] agriculture de précision
[Termes IGN] analyse comparative
[Termes IGN] classification
[Termes IGN] image Landsat
[Termes IGN] Kazakhstan
[Termes IGN] milieu rural
[Termes IGN] Pays-Bas
[Termes IGN] précision sémantique
[Termes IGN] segmentation d'image
[Termes IGN] spatial metricsRésumé : (Auteur) This paper addresses semantic accuracy in relation to images obtained with remote sensing. Semantic accuracy is defined in terms of map complexity. Complexity metrics are applied as a metric to measure complexity. The idea is that a homogeneous map of a low complexity is of a high semantic accuracy. In this study, complexity metrics like aggregation index, fragmentation index and patch size are applied on two images with different objectives, one from an agricultural area in the Netherlands, and one from a rural area in Kazakhstan. Images are segmented first using region merging segmentation. Effects on metrics and semantic accuracy are discussed. On the basis of well-defined subsets, we conclude that the complexity metrics are suitable to quantify the semantic accuracy of the map. Segmentation is the most useful for an agricultural area including various agricultural fields. Metrics are mutually comparable being highly correlated, but showing some different aspects in quantifying map homogeneity and identifying objects of a high semantic accuracy. Numéro de notice : A2005-295 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500057749 En ligne : https://doi.org/10.1080/01431160500057749 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27431
in International Journal of Remote Sensing IJRS > vol 26 n° 14 (July 2005) . - pp 2937 - 2951[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-05141 RAB Revue Centre de documentation En réserve L003 Exclu du prêt Geographic IR [information retrieval] systems : requirements and evaluation / Bénédicte Bucher (01/07/2005)
contenu dans ICC 2005, the 22nd International Cartographic Conference, A Coruña, Spain, 9–16 July 2005, proceedings / Joel L. Morrison (2005)
Titre : Geographic IR [information retrieval] systems : requirements and evaluation Type de document : Article/Communication Auteurs : Bénédicte Bucher , Auteur ; Paul Clough, Auteur ; Hideo Joho, Auteur ; Ross S. Purves, Auteur ; A. Syed, Auteur Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 01/07/2005 Conférence : ICC 2005, 22nd International Cartographic Conference of ICA 09/07/2005 16/07/2005 La Corogne Espagne Importance : 7 p. Format : 21 X 30 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] analyse des besoins
[Termes IGN] interface web
[Termes IGN] recherche d'information géographique
[Termes IGN] SPIRITRésumé : (Auteur) Geographic information retrieval is a new and evolving domain. The development of GIR systems requires the analysis of requirements for such systems and, after systems are implemented their evaluation. This paper describes requirement analysis and evaluation for the SPIRIT system. Methods of user and system-centred evaluation are described and a methodology for building a document collection to facilitate derivation of measures of system performance, together with a new scheme for the evaluation of spatial and thematic relevance with respect to search results are introduced. The paper stresses the importance of developing approaches to evaluate GIR systems which holistically evaluate user interactions as well as measures of system performance. Numéro de notice : 13873 Affiliation des auteurs : COGIT+Ext (1988-2011) Thématique : GEOMATIQUE Nature : Communication DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64288 Documents numériques
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13873_commu_geographic_ir_systems_bucher.pdfAdobe Acrobat PDF Possibilities and limits of prospective GIS land cover modelling, a compared case study: garretoxes (France) and Alta Alpujarra Granadina (Spain) / Martin Paegelow in International journal of geographical information science IJGIS, vol 19 n° 6 (july 2005)
[article]
Titre : Possibilities and limits of prospective GIS land cover modelling, a compared case study: garretoxes (France) and Alta Alpujarra Granadina (Spain) Type de document : Article/Communication Auteurs : Martin Paegelow, Auteur ; M.T. Camacho Olmedo, Auteur Année de publication : 2005 Article en page(s) : pp 697 - 722 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] analyse comparative
[Termes IGN] analyse multicritère
[Termes IGN] automate cellulaire
[Termes IGN] chaîne de Markov
[Termes IGN] Grenade
[Termes IGN] modélisation
[Termes IGN] occupation du sol
[Termes IGN] prédiction
[Termes IGN] prospective
[Termes IGN] Pyrénées-orientales (66)
[Termes IGN] système d'information géographiqueRésumé : (Auteur) This study focuses on the possibilities and the limits of a prospective GIS land cover modelling applied to two case studies (France and Spain). The methodology, based on available GIS tools, consists of using earlier land cover maps and relevant environmental factors (calibration data) to model actual, known land cover to validate the model. The model aggregates Markov chain analysis for time prediction and multi-critera evaluation, multi-objective evaluation and cellular automata to perform spatial contiguity of modelled land cover scores. The first results give an accurate, pixel by pixel prediction rate of approximately 75%. An important issue of this study consists of analysing prediction residues to improve the model. Numéro de notice : A2005-289 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810500076443 En ligne : https://doi.org/10.1080/13658810500076443 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27425
in International journal of geographical information science IJGIS > vol 19 n° 6 (july 2005) . - pp 697 - 722[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-05061 RAB Revue Centre de documentation En réserve L003 Disponible 079-05062 RAB Revue Centre de documentation En réserve L003 Disponible Visualizing geospatial information uncertainty: what we know and what we need to know / Alan M. MacEachren in Cartography and Geographic Information Science, vol 32 n° 3 (July 2005)
[article]
Titre : Visualizing geospatial information uncertainty: what we know and what we need to know Type de document : Article/Communication Auteurs : Alan M. MacEachren, Auteur ; A. Robinson, Auteur ; S. Hopper, Auteur ; et al., Auteur Année de publication : 2005 Article en page(s) : pp 139 - 160 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] aide à la décision
[Termes IGN] analyse comparative
[Termes IGN] analyse de la valeur
[Termes IGN] incertitude des données
[Termes IGN] modèle d'incertitude
[Termes IGN] qualité des données
[Termes IGN] représentation cartographique
[Termes IGN] visualisationRésumé : (Auteur) Developing reliable methods for representing and managing information uncertainty remains it persistent and relevant challenge to GIScience. Information uncertainty is an intricate idea, and recent examinations of this concept have generated many perspectives on its representation and visualization, with perspectives emerging from a wide range of disciplines and application contexts. In this paper, we review and assess progress toward visual tools and methods to help analysis manage and understand information uncertainty. Specifically, we report on efforts to conceptualize uncertainty, decision making with uncertainty, frameworks for representing uncertainty, visual representation and user control of displays of information uncertainty, and evaluative efforts to assess the use and usability of visual displays of uncertainty. We conclude by identifying seven key research challenges in visualizing information uncertainty, particularly as it applies to decision making and analysis. Numéro de notice : A2005-416 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1559/1523040054738936 En ligne : https://doi.org/10.1559/1523040054738936 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27552
in Cartography and Geographic Information Science > vol 32 n° 3 (July 2005) . - pp 139 - 160[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 032-05031 RAB Revue Centre de documentation En réserve L003 Disponible Airborne laser swath mapping: quantifying changes in sandy beaches over time scales of weeks to years / Ramesh L. Shrestha in ISPRS Journal of photogrammetry and remote sensing, vol 59 n° 4 (June - July 2005)PermalinkAnalyse spatiale de la susceptibilité des versants aux glissements de terrains : comparaison de deux approches spatialisées par SIG / Yannick Thiery in Revue internationale de géomatique, vol 15 n° 2 (juin – août 2005)PermalinkApplication of multi-temporal high-resolution imagery GPS in a study of the motion of a canyon rim landslide / John Chadwick in ISPRS Journal of photogrammetry and remote sensing, vol 59 n° 4 (June - July 2005)PermalinkLes chaînes de Markov spatialisées comme outil de simulation / Sylvie Ladet in Revue internationale de géomatique, vol 15 n° 2 (juin – août 2005)PermalinkA comparative analysis of image fusion methods / Z. 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