Paru le : 01/07/2005 ISBN/ISSN/EAN : 1365-8816 |
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Ajouter le résultat dans votre panierDynamic environmental modelling in GIS: 2. Modelling error propagation / D. Karssenberg in International journal of geographical information science IJGIS, vol 19 n° 6 (july 2005)
[article]
Titre : Dynamic environmental modelling in GIS: 2. Modelling error propagation Type de document : Article/Communication Auteurs : D. Karssenberg, Auteur ; K. de Jong, Auteur Année de publication : 2005 Article en page(s) : pp 623 - 637 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] langage de modélisation
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] modèle dynamique
[Termes IGN] modèle stochastique
[Termes IGN] modélisation 3D
[Termes IGN] modélisation spatio-temporelle
[Termes IGN] propagation d'erreurRésumé : (Auteur) Environmental modelling languages provide the possibility to construct models in two or three spatial dimensions. These models can be static models, without a time component, or dynamic models. Dynamic models are simulations run forward in time, where the state of the model at time t is defined as a function of its state in a period or time step preceding t. Since inputs and parameters of environmental models are associated with errors, environmental modelling languages need to provide techniques to calculate how these errors propagate to the output(s) of the model. Since these techniques are not yet available, the paper describes concepts for extending an environmental-modelling language with functionality for error-propagation modelling. The approach models errors in inputs and parameters as stochastic variables, while the error in the model outputs is approximated with a Monte Carlo simulation. A modelling language is proposed which combines standard functions in a structured script (program) for building environmental models, and calculation of error propagation in these models. A prototype implementation of the language is used in three example models to illustrate the concepts. Numéro de notice : A2005-286 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810500104799 En ligne : https://doi.org/10.1080/13658810500104799 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27422
in International journal of geographical information science IJGIS > vol 19 n° 6 (july 2005) . - pp 623 - 637[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 Discovering relative motion patterns in groups of moving point objects / P. Laube in International journal of geographical information science IJGIS, vol 19 n° 6 (july 2005)
[article]
Titre : Discovering relative motion patterns in groups of moving point objects Type de document : Article/Communication Auteurs : P. Laube, Auteur ; S. Imfeld, Auteur ; Robert Weibel, Auteur Année de publication : 2005 Article en page(s) : pp 639 - 668 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique
[Termes IGN] connaissance thématique
[Termes IGN] découverte de connaissances
[Termes IGN] exploration de données
[Termes IGN] langage de modélisation
[Termes IGN] objet mobile
[Termes IGN] positionnement cinématique
[Termes IGN] système d'information géographiqueRésumé : (Auteur) Technological advances in position-aware devices are leading to a wealth of data documenting motion. The integration of spatio-temporal data-mining techniques in GIScience is an important research field to overcome the limitations of static Geographic Information Systems with respect to the emerging volumes of data describing dynamics. This paper presents a generic geographic knowledge discovery approach for exploring the motion of moving point objects, the prime modelling construct to represent GPS tracked animals, people, or vehicles. The approach is based on the concept of geospatial lifelines and presents a formalism for describing different types of lifeline patterns that are generalizable for many application domains. Such lifeline patterns allow the identification and quantification of remarkable individual motion behaviour, events of distinct group motion behaviour, so as to relate the motion of individuals to groups. An application prototype featuring novel data-mining algorithms has been implemented and tested with two case studies: tracked soccer players and data points representing political entities moving in an abstract ideological space. In both case studies, a set of non-trivial and meaningful motion patterns could be identified, for instance highlighting the characteristic 'offside trap' behaviour in the first case and identifying trendsetting districts anticipating a political transformation in the latter case. Numéro de notice : A2005-287 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810500105572 En ligne : https://doi.org/10.1080/13658810500105572 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27423
in International journal of geographical information science IJGIS > vol 19 n° 6 (july 2005) . - pp 639 - 668[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 Technological aspects of a full 3D cadastral registration / Jantien E. Stoter in International journal of geographical information science IJGIS, vol 19 n° 6 (july 2005)
[article]
Titre : Technological aspects of a full 3D cadastral registration Type de document : Article/Communication Auteurs : Jantien E. Stoter, Auteur ; Peter J. M. Van Oosterom, Auteur Année de publication : 2005 Article en page(s) : pp 669 - 696 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cadastre étranger
[Termes IGN] cadastre étranger
[Termes IGN] modèle conceptuel de données localisées
[Termes IGN] modèle numérique de surface
[Termes IGN] modélisation 3D
[Termes IGN] objet géographique 3D
[Termes IGN] Oracle spatial
[Termes IGN] partition de surface
[Termes IGN] polyèdre
[Termes IGN] prototype
[Termes IGN] Queensland (Australie)
[Termes IGN] système d'information foncière
[Termes IGN] Triangulated Irregular NetworkRésumé : (Auteur) In this paper, we present a new conceptual model for a full 3D cadastral registration system. Two important components are : (1) the "surface parcel partition" based on a detailed elevation model and (2) the volume parcel and its representation. Technological solutions for both parts are not yet available in commercial Geo-ICT software, and therefore solutions have been investigated, designed and developed (in a geo-DBMS environment). A number of countries in the world do already have legislation allowing the registration of volume parcels, sometimes even including detailed regulations for 3D survey plans. However, until now, these have not yet been integrated in the cadastral information system. A 3D case from Queensland, Australia is presented, and a prototype is realized based on an integrated 3D cadastral information system : elevation-model-based surface parcels complemented with volume parcels. Numéro de notice : A2005-288 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810500106042 En ligne : https://doi.org/10.1080/13658810500106042 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27424
in International journal of geographical information science IJGIS > vol 19 n° 6 (july 2005) . - pp 669 - 696[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 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 The technique of distance decayed visibility for forest landscape visualization / C. Kumsap in International journal of geographical information science IJGIS, vol 19 n° 6 (july 2005)
[article]
Titre : The technique of distance decayed visibility for forest landscape visualization Type de document : Article/Communication Auteurs : C. Kumsap, Auteur ; F. Borne, Auteur ; D. Moss, Auteur Année de publication : 2005 Article en page(s) : pp 723 - 744 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] altération
[Termes IGN] distance de propagation
[Termes IGN] forêt
[Termes IGN] paysage
[Termes IGN] point d'appui
[Termes IGN] système d'information géographique
[Termes IGN] visualisation 3DRésumé : (Auteur) The paper discusses an approach known as 'distance-decayed visibility', implemented using GIS, to the composition of 3D scenes for static forest landscape visualization. The distance-decay concept is employed to model a spatial interaction in terms of visibility between any observation points and vegetations visible from those points. The vegetation visibility is measured in level of detail where high visibility uses high level of detail and vice versa. The interaction is modelled mathematically using an exponential decay function. The point distribution of projected models on a 3D scene is calculated in GIS to assign an appropriate value of 'visibility decay constant' to relate the distance from the observation point to the vegetations with the level of detail of the vegetations in the function. The advantages of the technique as measured against the quantitative benchmarks of rendering time and the number of polygons computed are addressed. Although the forest landscape of the study area consists of a large number of vegetation models, the technique helps to model the relation of vegetation visibility and viewing distance so realistically that the technique yields the visual quality of the result 3D scene visually and statistically comparable to the finest resolution scene. Numéro de notice : A2005-290 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810500104880 En ligne : https://doi.org/10.1080/13658810500104880 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27426
in International journal of geographical information science IJGIS > vol 19 n° 6 (july 2005) . - pp 723 - 744[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