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GIS-based multicriteria spatial modeling generic framework / S. Chakhar in International journal of geographical information science IJGIS, vol 22 n°11-12 (november 2008)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 22 n°11-12 (november 2008) . - pp 1159 - 1196 Titre : GIS-based multicriteria spatial modeling generic framework Type de document : Article/Communication Auteurs : S. Chakhar, Auteur ; V. Mousseau, Auteur Année de publication : 2008 Article en page(s) : pp 1159 - 1196 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] analyse multicritère [Termes IGN] modélisation spatiale [Termes IGN] système d'information géographique Résumé : (Auteur) Multicriteria analysis is a set of mathematical tools and methods allowing the comparison of different alternatives according to many criteria, often conflicting, to guide the decision maker towards a judicious choice. Multicriteria methods are used in spatial context to evaluate and compare spatial decision alternatives, often modeled through constraint-based suitability analysis and represented by point, line, and polygon features or their combination, and evaluated on several space-related criteria, to select a restricted subset for implementation. Outranking methods, a family of multicriteria methods, may be useful in spatial decision problems, especially when ordinal evaluation criteria are implied. However, it is recognized that these methods, except those devoted to multicriteria classification problems, are subject to computational limitations with respect to the number of alternatives. This paper proposes a framework to facilitate the incorporation and use of outranking methods in geographical information systems (GIS). The framework is composed of two phases. The first phase allows producing a planar subdivision of the study area obtained by combining a set of criteria maps; each represents a particular vision of the decision problem. The result is a set of non-overlapping spatial units. The second phase allows constructing decision alternatives by combining the spatial units. Point, line and polygon feature-based decision alternatives are then constructed as an individual, a grouping of linearly adjacent or a grouping of contiguous spatial units. This permits us to reduce considerably the number of alternatives, enabling the use of outranking methods. The framework is illustrated through the development of a prototype and through a step-by-step application to a corridor identification problem. This paper includes also a discussion of some conceptual and technical issues related to the framework. Copyright Taylor & Francis Numéro de notice : A2008-399 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810801949827 En ligne : https://doi.org/10.1080/13658810801949827 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29391 [article]

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Prediction and visualization of GPS multipath signals in urban areas using LiDAR Digital Surface Models and building footprints / J. Li in International journal of geographical information science IJGIS, vol 22 n°11-12 (november 2008)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 22 n°11-12 (november 2008) . - pp 1197 - 1218 Titre : Prediction and visualization of GPS multipath signals in urban areas using LiDAR Digital Surface Models and building footprints Type de document : Article/Communication Auteurs : J. Li, Auteur ; Georges E. Taylor, Auteur ; D. Kidner, Auteur ; M. Ware, Auteur Année de publication : 2008 Article en page(s) : pp 1197 - 1218 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] bâtiment [Termes IGN] dégradation du signal [Termes IGN] données lidar [Termes IGN] empreinte [Termes IGN] incertitude géométrique [Termes IGN] lancer de rayons [Termes IGN] milieu urbain [Termes IGN] modèle numérique de surface [Termes IGN] propagation du signal [Termes IGN] signal GPS [Termes IGN] trajet multiple [Termes IGN] visualisation de données Résumé : (Auteur) This paper explains a ray tracing method which is applied to prediction and visualization of diffracted and reflected GPS signals in dense urban areas. Reflected and diffracted signals can have a detrimental effect on GPS positioning accuracy especially in highly built-up areas. The ray tracing technique implemented in this paper is specially geared to LiDAR height pole data at 1-m spatial resolution and 2D building footprints in raster and vector format, respectively. Such a simple data format allows for rapid implementation of 3D ray tracing in a GIS without further processing so that detailed 3D urban models in vector format are not required. Issues of spatial uncertainty in the data used are also addressed in relation to the identification of multipath signals. Some preliminary results obtained from fieldwork are presented and analysed in detail. Copyright Taylor & Francis Numéro de notice : A2008-400 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1080/13658810701851396 En ligne : https://doi.org/10.1080/13658810701851396 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29392 [article]

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Designing sound in cybercartography: from structured cinematic narratives to unpredictable sound-image interactions / Sébastien Caquard in International journal of geographical information science IJGIS, vol 22 n°11-12 (november 2008)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 22 n°11-12 (november 2008) . - pp 1219 - 1245 Titre : Designing sound in cybercartography: from structured cinematic narratives to unpredictable sound-image interactions Type de document : Article/Communication Auteurs : Sébastien Caquard, Auteur ; Glenn Brauen, Auteur ; B. Wright, Auteur ; P. Jasen, Auteur Année de publication : 2008 Article en page(s) : pp 1219 - 1245 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] acoustique [Termes IGN] Antarctique [Termes IGN] atlas numérique [Termes IGN] bruit (audition) [Termes IGN] carte auditive [Termes IGN] cartographie par internet Résumé : (Auteur) In this paper, we draw on the analysis of sound in film theory in order to explore the potential that sound offers cybercartography. We first argue that the theoretical body developed in film studies is highly relevant to the study of sound/image relationships in mapmaking. We then build on this argument to develop experimental animated and interactive sound maps for the Cybercartographic Atlas of Antarctica that further explore the potential of sound for integrating emotional, cultural and political dimensions in cartography. These maps have been designed to recreate cinematic soundscapes, to provide contrapuntal perspectives on the cartographic image and to generate an aural identity of the atlas. As part of this experimental mapping, an innovative sound infrastructure is being developed to allow complex sound designs to be transmitted over the Internet as part of atlas content. Through this infrastructure, the user can select as well as contribute his own sounds. The overall cartographic message is becoming less predictable, thus opening new perspectives on the way we design, interact with, and modify sounded maps over the Internet. Copyright Taylor & Francis Numéro de notice : A2008-401 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810801909649 En ligne : https://doi.org/10.1080/13658810801909649 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29393 [article]

Exemplaires(2)

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079-08072	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A bottom-up approach to discover transition rules of cellular automata using ant intelligence / X. Liu in International journal of geographical information science IJGIS, vol 22 n°11-12 (november 2008)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 22 n°11-12 (november 2008) . - pp 1247 - 1269 Titre : A bottom-up approach to discover transition rules of cellular automata using ant intelligence Type de document : Article/Communication Auteurs : X. Liu, Auteur ; X. Li, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 1247 - 1269 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] automate cellulaire [Termes IGN] discrétisation [Termes IGN] Kouangtoung (Chine) [Termes IGN] modélisation spatiale [Termes IGN] optimisation par colonie de fourmis [Termes IGN] simulation spatiale Résumé : (Auteur) This paper presents a new method to discover transition rules of geographical cellular automata (CA) based on a bottom-up approach, ant colony optimization (ACO). CA are capable of simulating the evolution of complex geographical phenomena. The core of a CA model is how to define transition rules so that realistic patterns can be simulated using empirical data. Transition rules are often defined by using mathematical equations, which do not provide easily understandable explicit forms. Furthermore, it is very difficult, if not impossible, to specify equation-based transition rules for reflecting complex geographical processes. This paper presents a method of using ant intelligence to discover explicit transition rules of urban CA to overcome these limitations. This 'bottom-up' ACO approach for achieving complex task through cooperation and interaction of ants is effective for capturing complex relationships between spatial variables and urban dynamics. A discretization technique is proposed to deal with continuous spatial variables for discovering transition rules hidden in large datasets. The ACO-CA model has been used to simulate rural-urban land conversions in Guangzhou, Guangdong, China. Preliminary results suggest that this ACO-CA method can have a better performance than the decision-tree CA method. Copyright Taylor & Francis Numéro de notice : A2008-402 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810701757510 En ligne : https://doi.org/10.1080/13658810701757510 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29394 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
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079-08072	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Fuzzy inference guided cellular automata urban-growth modelling using multi-temporal satellite images / S. Al-Kheder in International journal of geographical information science IJGIS, vol 22 n°11-12 (november 2008)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 22 n°11-12 (november 2008) . - pp 1271 - 1293 Titre : Fuzzy inference guided cellular automata urban-growth modelling using multi-temporal satellite images Type de document : Article/Communication Auteurs : S. Al-Kheder, Auteur ; Jing Wang, Auteur ; J. Shan, Auteur Année de publication : 2008 Article en page(s) : pp 1271 - 1293 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse diachronique [Termes IGN] automate cellulaire [Termes IGN] croissance urbaine [Termes IGN] étalonnage des données [Termes IGN] image multitemporelle [Termes IGN] image satellite [Termes IGN] Indianapolis [Termes IGN] Inférence floue [Termes IGN] modélisation spatio-temporelle [Termes IGN] moteur d'inférence [Termes IGN] urbanisation Résumé : (Auteur) This paper presents a fuzzy inference guided cellular automata approach. Semantic or linguistic knowledge on urban development is expressed as fuzzy rules, based on which fuzzy inference is applied to determine the urban development potential for each pixel. A defuzzification process converts the development potential to the required neighbourhood development level, which is taken by cellular automata as initial approximation for its transition rules. Such approximations are updated through spatial calibration over townships and temporal calibration with multi-temporal satellite images. Assessment of the modelling results is based on three evaluation measures: fitness and Type I and Type II errors. The approach is applied to model the growth of the city of Indianapolis, Indiana over a period of 30 years from 1973 to 2003. A fitness level of 100 + 20% with 30% average errors can be achieved for 80% of the townships in urban-growth prediction. Copyright Taylor & Francis Numéro de notice : A2008-403 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810701617292 En ligne : https://doi.org/10.1080/13658810701617292 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29395 [article]

Exemplaires(2)

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An initial formal model for spatial data infrastructures / Jan Hjelmager in International journal of geographical information science IJGIS, vol 22 n°11-12 (november 2008)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 22 n°11-12 (november 2008) . - pp 1295 - 1309 Titre : An initial formal model for spatial data infrastructures Type de document : Article/Communication Auteurs : Jan Hjelmager, Auteur ; Harold Moellering, Auteur ; Anthony K. Cooper, Auteur ; Tatiana Delgado, Auteur ; Abbas Rajabifard, Auteur ; Petr Rapant, Auteur ; David Danko, Auteur ; Michel Huet, Auteur ; Dominique Laurent , Auteur ; Henri Aalders, Auteur ; Adam Iwaniak, Auteur ; Paloma Abad, Auteur ; Ulrich Düren, Auteur ; Alexander Martynenko, Auteur Année de publication : 2008 Article en page(s) : pp 1295 - 1309 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] Association cartographique internationale [Termes IGN] infrastructure mondiale des données localisées [Termes IGN] normalisation [Termes IGN] norme cartographique [Termes IGN] standard [Termes IGN] UML Résumé : (Auteur) The Commission on Spatial Data Standards of the International Cartographic Association is working to define formal models and technical characteristics of Spatial Data Infrastructures (SDI). To date, this work has been restricted to the Enterprise and Information Viewpoints from the ISO Reference Model for Open Distributed Processing standard. The Commission has developed models for these two viewpoints. These models describe how the different parts of an SDI fit together in the viewpoints in question. These models should be seen as a contribution towards the overall model of the SDI and its technical characteristics. During the model development process, the roles of the different Actors in an SDI in the Enterprise and Information Viewpoints have also been identified in Use Case diagrams of an SDI. All the models have been developed using the Unified Modeling Language. Copyright Taylor & Francis Numéro de notice : A2008-404 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810801909623 Date de publication en ligne : 04/12/2010 En ligne : https://doi.org/10.1080/13658810801909623 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29396 [article]

Exemplaires(2)

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