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Framework for probabilistic geospatial ontologies / S. Sen in International journal of geographical information science IJGIS, vol 22 n° 6-7 (june 2008)
[article]
Titre : Framework for probabilistic geospatial ontologies Type de document : Article/Communication Auteurs : S. Sen, Auteur Année de publication : 2008 Article en page(s) : pp 825 - 846 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] accès aux données localisées
[Termes IGN] base de données localisées
[Termes IGN] classification bayesienne
[Termes IGN] inférence
[Termes IGN] ontologie
[Termes IGN] OWL
[Termes IGN] référentiel sémantique
[Termes IGN] réseau routierRésumé : (Auteur) Partial knowledge about geospatial categories is important for practical use of ontologies in the geospatial domain. Degree of overlaps between geospatial categories, especially those based on geospatial actions concepts and geospatial enitity concepts, need to be specified in ontologies. Conventional geospatial ontologies do not enable specification of such information, and this presents difficulties in ontology reasoning for practical purposes. We present a framework to encode probabilistic information in geospatial ontologies based on the BayesOWL approach. The approach enables rich inferences such as most similar concepts within and across ontologies. This paper presents two case studies of using road-network ontologies to demonstrate the framework for probabilistic geospatial ontologies. Besides inferences within the probabilistic ontologies, we discuss inferences about most similar concepts across ontologies based on the assumption that geospatial action concepts are invariable. The results of such machine-based mappings of most similar concepts are verified with mappings of concepts extracted from human subjects testing. The practical uses of probabilistic geospatial ontologies for concept matching and measuring naming heterogeneities between two ontologies are discussed. Based on our experiments, we propose such a framework for probabilistic geospatial ontologies as an advancement of the proposal to develop semantic reference systems. Copyright Taylor & Francis Numéro de notice : A2008-234 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810701694853 En ligne : https://doi.org/10.1080/13658810701694853 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29229
in International journal of geographical information science IJGIS > vol 22 n° 6-7 (june 2008) . - pp 825 - 846[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-08041 RAB Revue Centre de documentation En réserve L003 Disponible 079-08042 RAB Revue Centre de documentation En réserve L003 Disponible Operation analysis of a reservoir in GIS environment using remote sensing inputs / M.K. Goel in International Journal of Remote Sensing IJRS, vol 28 n° 1-2 (January 2007)
[article]
Titre : Operation analysis of a reservoir in GIS environment using remote sensing inputs Type de document : Article/Communication Auteurs : M.K. Goel, Auteur ; P. Kumar, Auteur ; Sanjay K. Jain, Auteur ; R.S. Tiwaris, Auteur Année de publication : 2007 Article en page(s) : pp 335 - 352 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] allocation
[Termes IGN] analyse des besoins
[Termes IGN] eau pluviale
[Termes IGN] gestion de l'eau
[Termes IGN] image IRS-LISS
[Termes IGN] Inde
[Termes IGN] inférence
[Termes IGN] irrigation
[Termes IGN] simulation hydrodynamique
[Termes IGN] système d'information géographique
[Termes IGN] système expertRésumé : (Auteur) Reservoir management involves allocating available water among multiple uses and users, minimizing the risks of water shortages and flooding and optimizing the beneficial use of water. Irrigation demands from a reservoir, which are generally computed by using the design cropping pattern and average rainfall conditions, may vary over the years depending on the actual cropping pattern and meteorological conditions. This study demonstrates the utility of remote sensing inputs and geographic information system (GIS) environment for determining realistic irrigation demands from a reservoir. Remote sensing data are used to map the actual cropping pattern in the command area while the GIS is used for integrating the field-level irrigation demands up to the canal system head. Ten daily irrigation demands in the command area of Samrat Ashok Sagar Reservoir in Madhya Pradesh, India, have been estimated and the reservoir operation policy has been derived. Through the simulation analysis with 29 years of inflow data, rule curves have been derived for the operation of reservoir so that water deficit (if any) can be distributed in time much in advance and severe crop failure can be avoided. Inferences drawn from the analysis can guide the system operator in using the available water in a scientific and judicious manner. Numéro de notice : A2007-036 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160600735616 En ligne : https://doi.org/10.1080/01431160600735616 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82959
in International Journal of Remote Sensing IJRS > vol 28 n° 1-2 (January 2007) . - pp 335 - 352[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 080-07011 RAB Revue Centre de documentation En réserve L003 Disponible Towards an understanding of geovisualization with dynamic displays: issues and prospects / Sara Irina Fabrikant (2005)
Titre : Towards an understanding of geovisualization with dynamic displays: issues and prospects Type de document : Article/Communication Auteurs : Sara Irina Fabrikant, Auteur Editeur : American Association for Artificial Intelligence AAAI Année de publication : 2005 Conférence : AAAI 2005, Spring Symposium 21/03/2005 23/03/2005 Palo Alto Californie - Etats-Unis Importance : 6 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] cognition
[Termes IGN] géovisualisation
[Termes IGN] inférence
[Termes IGN] interactivité
[Termes IGN] variable visuelle
[Termes IGN] visualisation cartographique
[Termes IGN] visualisation dynamique
[Vedettes matières IGN] GéovisualisationNuméro de notice : C2005-005 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84337 Registration of multi-source, multi-resolution, and multi-temporal satellite imagery: issues and applications / A. Habib in Geoinformatics, vol 7 n° 8 (01/12/2004)
[article]
Titre : Registration of multi-source, multi-resolution, and multi-temporal satellite imagery: issues and applications Type de document : Article/Communication Auteurs : A. Habib, Auteur Année de publication : 2004 Article en page(s) : pp 30 - 33 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] appariement d'images
[Termes IGN] image multi sources
[Termes IGN] image multitemporelle
[Termes IGN] image satellite
[Termes IGN] inférence
[Termes IGN] précision des données
[Termes IGN] superposition d'images
[Termes IGN] transformation
[Termes IGN] vision par ordinateurRésumé : (Auteur) Image registration is concerned with the problem of how to combine data and/to information from multiple sensors in order to achieve improved accuracies and better inference about the environment than could be attained through the use of a single sensor. Registration of imagery and/or information from multiple sources is essential for a variety of applications in remote sensing, medical diagnosis, computer vision, and pattern recognition. Numéro de notice : A2004-507 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27024
in Geoinformatics > vol 7 n° 8 (01/12/2004) . - pp 30 - 33[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-04081 SL Revue Centre de documentation Revues en salle Disponible Statistische Untersuchung ganzzahliger und reellwertiger unbekannter Parameter im GPS-Modell / B. Gundlich (2002)
Titre : Statistische Untersuchung ganzzahliger und reellwertiger unbekannter Parameter im GPS-Modell Titre original : [Statistical inference on integer and real valued unknown parameters in the GPS model] Type de document : Thèse/HDR Auteurs : B. Gundlich, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2002 Collection : DGK - C Sous-collection : Dissertationen num. 549 Importance : 65 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9588-5 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] ambiguïté entière
[Termes IGN] axiome de Bayes
[Termes IGN] données GPS
[Termes IGN] inférence
[Termes IGN] mesurage de phase
[Termes IGN] mesurage de pseudo-distance
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] résolution d'ambiguïté
[Termes IGN] traitement de données GNSSIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Auteur) This thesis investigates statistical inference in a model with real valued and integer unknown parameters. This model is given for example in case of GPS (Global Positioning System) which provides pseudorange measurements and the observation of carrier phases. When observing carrier phases the integer numbers of full cycles are unknown. These integer ambiguities have to be considered in a statistical inference. Usually the float solution and the fixed solution are applied. Using the float solution the integer ambiguities are considered as real valued unknown parameters. In the fixed solution they are completely or partly estimated as integers and then fixed. The remaining parameters are estimated given the integer ambiguities. Therefore the fixed solution has to be validated. The ambiguity acceptance test investigates, if the model with integer ambiguities might be accepted. The integer estimation of the ambiguities is compared with other possible integer ambiguities in a discrimination test. In this thesis the GPS model is consistently considered as a model containing integer and real valued unknown parameters in order to avoid the extreme float and fixed solution. Applying traditional statistics and Bayesian statistics the unknown parameters are estimated, hypotheses are tested and confidence regions computed. This leads to new validation procedures concerning the ambiguity acceptance test and the discrimination test. Estimating confidence regions is computationally demanding, therefore an approximation is developed by Bayesian statistics. Bayesian statistics offers the possibility to use prior information, which is used to express the knowledge about the integer ambiguities in a model with only real valued parameters. By this means solutions are developed which only in extreme cases lead to the float solution or to the solution in the model with integer and real valued parameters. An example with real GPS data is given. Numéro de notice : 13099 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54882 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13099-02 30.61 Livre Centre de documentation Géodésie Disponible 13099-01 30.61 Livre Centre de documentation Géodésie Disponible Recherches dans le domaine de l'intelligence artificielle et systèmes experts en géographie / V.S. Tikunov in Annales de géographie, n° 552 (mars - avril 1990)PermalinkProblématiques et méthodes en raisonnement approché / Henri Prade (16/11/1987)Permalink