Paru le : 01/11/2006 ISBN/ISSN/EAN : 1365-8816 |
[n° ou bulletin]
[n° ou bulletin]
|
Réservation
Réserver ce documentExemplaires(2)
Code-barres | Cote | Support | Localisation | Section | Disponibilité |
---|---|---|---|---|---|
079-06101 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
079-06102 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
Dépouillements
Ajouter le résultat dans votre panierMonitoring qualitative spatiotemporal change for geosensor networks / Michael F. Worboys in International journal of geographical information science IJGIS, vol 20 n° 10 (november 2006)
[article]
Titre : Monitoring qualitative spatiotemporal change for geosensor networks Type de document : Article/Communication Auteurs : Michael F. Worboys, Auteur ; Matt Duckham, Auteur Année de publication : 2006 Article en page(s) : pp 1087 - 1108 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] données spatiotemporelles
[Termes IGN] graphe
[Termes IGN] modèle conceptuel de données localisées
[Termes IGN] objet géographique
[Termes IGN] raisonnement spatial
[Termes IGN] topologieRésumé : (Auteur) Recent technological advances in geosensor networks demand new models of distributed computation with dynamic spatial information. This paper presents a computational model of spatial change in dynamic regions (such as may be derived from discretizations of continuous fields) founded on embeddings of graphs in orientable surfaces. Continuous change, connectedness and regularity of dynamic regions are defined and local transition rules are used to constrain region evolution and enable more efficient inference of a region's state. The model provides a framework for the detection of global high-level events based on local low-level ‘snapshot’ spatiotemporal data. The approach has particular relevance to environmental monitoring with geosensor networks, where technological constraints make the detection of global behaviour from local conditions highly advantageous. Copyright Taylor & Francis Numéro de notice : A2006-451 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600852180 En ligne : https://doi.org/10.1080/13658810600852180 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28175
in International journal of geographical information science IJGIS > vol 20 n° 10 (november 2006) . - pp 1087 - 1108[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-06101 RAB Revue Centre de documentation En réserve L003 Disponible 079-06102 RAB Revue Centre de documentation En réserve L003 Disponible An extended cellular automaton using case-based reasoning for simulating urban development in a large complex region / X. Li in International journal of geographical information science IJGIS, vol 20 n° 10 (november 2006)
[article]
Titre : An extended cellular automaton using case-based reasoning for simulating urban development in a large complex region Type de document : Article/Communication Auteurs : X. Li, Auteur ; X. Liu, Auteur Année de publication : 2006 Article en page(s) : pp 1109 - 1136 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] automate cellulaire
[Termes IGN] Chine
[Termes IGN] classification barycentrique
[Termes IGN] complexité
[Termes IGN] croissance urbaine
[Termes IGN] delta
[Termes IGN] delta de la rivière des perles
[Termes IGN] image multitemporelle
[Termes IGN] raisonnement
[Termes IGN] simulation dynamique
[Termes IGN] système d'information géographiqueRésumé : (Auteur) Rule-based cellular automata (CA) have been increasingly applied to the simulation of geographical phenomena, such as urban evolution and land-use changes. However, these models have difficulties and uncertainties in soliciting transition rules for a large complex region. This paper presents an extended cellular automaton in which transition rules are represented by using case-based reasoning (CBR) techniques. The common k-NN algorithm of CBR has been modified to incorporate the location factor to reflect the spatial variation of transition rules. Multi-temporal remote-sensing images are used to obtain the adaptation knowledge in the temporal dimension. This model has been applied to the simulation of urban development in the Pearl River Delta which has a hierarchy of cities. Comparison indicates that this model can produce more plausible results than rule-based CA in simulating this large complex region in 1988-2002. Copyright Taylor & Francis Numéro de notice : A2006-452 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810600816870 En ligne : https://doi.org/10.1080/13658810600816870 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28176
in International journal of geographical information science IJGIS > vol 20 n° 10 (november 2006) . - pp 1109 - 1136[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-06101 RAB Revue Centre de documentation En réserve L003 Disponible 079-06102 RAB Revue Centre de documentation En réserve L003 Disponible Terrain complexity and uncertainties in grid-based digital terrain analysis / Q. Zhou in International journal of geographical information science IJGIS, vol 20 n° 10 (november 2006)
[article]
Titre : Terrain complexity and uncertainties in grid-based digital terrain analysis Type de document : Article/Communication Auteurs : Q. Zhou, Auteur ; X. Liu, Auteur ; Y. Sun, Auteur Année de publication : 2006 Article en page(s) : pp 1137 - 1147 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] complexité
[Termes IGN] incertitude géométrique
[Termes IGN] modèle d'erreur
[Termes IGN] modèle numérique de terrain
[Termes IGN] pente
[Termes IGN] reliefRésumé : (Auteur) The objective of this research is to study the relationship between terrain complexity and terrain analysis results from grid-based digital elevation models (DEMs). The impact of terrain complexity represented by terrain steepness and orientation on derived parameters such as slope and aspect has been analysed. Experiments have been conducted to quantify the uncertainties created by digital terrain analysis algorithms. The test results show that (a) the RMSE of derived slope and aspect is negatively correlated with slope steepness; (b) the RMSE of derived aspect is more sensitive to terrain complexity than that of derived slope; and (c) the uncertainties in derived slope and aspect tend to be found in flatter areas, and decrease with increasing terrain complexity. The study shows that although primary surface parameters can be well defined mathematically, the implementation of those mathematical models in a GIS environment may generate considerable uncertainties related to terrain complexity. In general, when terrain is rugged with steep slopes, the uncertainty of derived parameters is quite minimal. While in flatter areas, the DEM-based derivatives, particularly the aspect, may contain a great amount of uncertainty, causing significant limitation in applying the analytical results. Copyright Taylor & Francis Numéro de notice : A2006-453 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810600816573 En ligne : https://doi.org/10.1080/13658810600816573 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28177
in International journal of geographical information science IJGIS > vol 20 n° 10 (november 2006) . - pp 1137 - 1147[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-06101 RAB Revue Centre de documentation En réserve L003 Disponible 079-06102 RAB Revue Centre de documentation En réserve L003 Disponible Reactions to geovisualization: an experience from a European project / Gennady Andrienko in International journal of geographical information science IJGIS, vol 20 n° 10 (november 2006)
[article]
Titre : Reactions to geovisualization: an experience from a European project Type de document : Article/Communication Auteurs : Gennady Andrienko, Auteur ; Natalia Andrienko, Auteur ; R. Fischer, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 1149 - 1171 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique
[Termes IGN] données localisées
[Termes IGN] exploration de données géographiques
[Termes IGN] sylviculture
[Termes IGN] visualisation de donnéesRésumé : (Auteur) The paper is written jointly by two parties, computer scientists specializing in geovisualization and experts in forestry, who cooperated within a joint project. The authors tell a story about an attempt of the geovisualizers to introduce the foresters to the concept and principles of exploratory data analysis and to the use of visualization for systematic and comprehensive data exploration. This endeavor should be considered as an informal experiment rather than a rigorous scientific study. Unlike customary tests of the usability of specific tools and techniques, the geovisualizers did not give the forestry specialists a series of tasks to carry out by applying geovisualization tools and did not try to measure how well the foresters performed. The idea of the geovisualizers was to demonstrate the principles and power of exploratory data analysis to the foresters by example. For this purpose, the geovisualizers performed an exploration of a non-trivial data set by themselves and reported the procedure, the principles, the techniques, and the findings to the foresters. The reaction of the foresters uncovered a range of fundamental issues that are relevant to geovisualization and information visualization research. The authors analyze these issues from their perspectives and formulate a set of questions which researchers in geovisualization should be asking. Copyright Taylor & Francis Numéro de notice : A2006-454 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : 10.1080/13658810600816524 En ligne : https://doi.org/10.1080/13658810600816524 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28178
in International journal of geographical information science IJGIS > vol 20 n° 10 (november 2006) . - pp 1149 - 1171[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-06101 RAB Revue Centre de documentation En réserve L003 Disponible 079-06102 RAB Revue Centre de documentation En réserve L003 Disponible Accuracy of quantized Voronoi diagrams / Yukio Sadahiro in International journal of geographical information science IJGIS, vol 20 n° 10 (november 2006)
[article]
Titre : Accuracy of quantized Voronoi diagrams Type de document : Article/Communication Auteurs : Yukio Sadahiro, Auteur ; T. Tominaga, Auteur Année de publication : 2006 Article en page(s) : pp 1173 - 1189 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Statistiques
[Termes IGN] approximation
[Termes IGN] diagramme de Voronoï
[Termes IGN] maille triangulaire
[Termes IGN] objet géographique
[Termes IGN] tessellationRésumé : (Auteur) Quantization of spatial objects, which usually means vector-to-raster conversion in GIS and remote sensing, is a basic operation used for handling spatial data from data creation to visualization. Since quantization is an approximation of spatial objects, it inevitably yields errors in measuring their properties such as area, perimeter, diameter, and so forth. This paper discusses the accuracy of a quantized Voronoi diagram, a spatial tessellation generated from a set of points. A measure is proposed to evaluate the accuracy of the area of Voronoi regions calculated after quantization. In one-dimensional space the measure is expressed as an explicit function of the expected number of generators in a cell. In two-dimensional space, on the other hand, the measure is defined by an implicit function, whose approximation is derived in an explicit form. These functions permit us to evaluate the accuracy of quantization in relation to the size of lattice cells and the density of Voronoi generators. This leads to an appropriate choice of a lattice to keep the quality of a quantized Voronoi diagram at a desirable level. Copyright Taylor & Francis Numéro de notice : A2006-455 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Article DOI : 10.1080/13658810600816748 En ligne : https://doi.org/10.1080/13658810600816748 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28179
in International journal of geographical information science IJGIS > vol 20 n° 10 (november 2006) . - pp 1173 - 1189[article]Réservation
Réserver ce documentExemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-06101 RAB Revue Centre de documentation En réserve L003 Disponible 079-06102 RAB Revue Centre de documentation En réserve L003 Disponible