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Exemplaires(2)
| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| 079-07061 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
| 079-07062 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
Dépouillements
Ajouter le résultat dans votre panierA partition-based serial algorithm for generating viewshed on massive DEMs / H. Wu in International journal of geographical information science IJGIS, vol 21 n° 9-10 (october 2007)
Titre : A partition-based serial algorithm for generating viewshed on massive DEMs Type de document : Article/Communication Auteurs : H. Wu, Auteur ; M. Pan, Auteur ; L. Yao, Auteur ; B. Luo, Auteur Année de publication : 2007 Article en page(s) : pp 955 - 964 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] algorithme géométrique
[Termes IGN] modèle numérique de surface
[Termes IGN] partitionnement par blocRésumé : (Auteur) As increasingly large-scale and higher-resolution terrain data have become available, for example air-form and space-borne sensors, the volume of these datasets reveals scalability problems with existing GIS algorithms. To address this problem, a kind of serial algorithm was developed to generate viewshed on large grid-based digital elevation models (DEMs). We first divided the whole DEM into rectangular blocks in row and column directions (called block partitioning), then processed these blocks with four axes followed by four sectors sequentially. When processing the particular block, we adopted the 'reference plane' algorithm to calculate the visibility of the target point on the block, and adjusted the calculation sequence according to the different spatial relationships between the block and the viewpoint since the viewpoint is not always inside the DEM. By adopting the 'Reference Plane' algorithm and using a block partitioning method to segment and load the DEM dynamically, it is possible to generate viewshed efficiently in PC-based environments. Experiments showed that the divided block should be dynamically loaded whole into computer main memory when partitioning, and the suggested approach retains the accuracy of the reference plane algorithm and has near linear compute complexity. Copyright Taylor & Francis Numéro de notice : A2007-551 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810601034218 En ligne : https://doi.org/10.1080/13658810601034218 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28914
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 955 - 964[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Polygon-based texture mapping for cyber city 3D building models Type de document : Article/Communication Auteurs : F. Tsai, Auteur ; H.C. Lin, Auteur Année de publication : 2007 Article en page(s) : pp 965 - 981 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] bati
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] mosaïque d'images
[Termes IGN] photographie numérique
[Termes IGN] polygone
[Termes IGN] prise de vue terrestre
[Termes IGN] réalité virtuelle
[Termes IGN] texturage
[Termes IGN] texture d'imageRésumé : (Auteur) The three-dimensional building model is one of the most important components in a cyber city implementation. Currently, however, most building models do not have sufficient and accurate texture information. The lack of texture not only makes 3D building models less realistic in visualization, it may also fail to provide needed information in intricate applications. This study developed a polygon-based texture mapping system to produce near photo-realistic texture mappings for 3D building models. Textures of building exteriors were generated from mosaics of close-range photographs acquired with commodity digital cameras. The developed system integrated multiple digital photographs to create texture mosaics that were continuous in geometric outlines and smooth in colour shadings, and correctly mapped them onto corresponding building model façades. A test example demonstrated that the resultant building model had more complete and accurate texture features as well as a near-photo-realistic appearance. Copyright Taylor & Francis Numéro de notice : A2007-552 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810601034929 En ligne : https://doi.org/10.1080/13658810601034929 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28915
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 965 - 981[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : An elevation of void-filling interpolation methods for SRTM data Type de document : Article/Communication Auteurs : H.I. Reuter, Auteur ; A. Nelson, Auteur ; A. Jarvis, Auteur Année de publication : 2007 Article en page(s) : pp 983 - 1008 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] fonction spline d'interpolation
[Termes IGN] image SRTM
[Termes IGN] interpolation
[Termes IGN] interpolation linéaire
[Termes IGN] interpolation spatiale
[Termes IGN] krigeage
[Termes IGN] MNS SRTM
[Termes IGN] modèle numérique de surface
[Termes IGN] Triangulated Irregular NetworkRésumé : (Auteur) The Digital Elevation Model that has been derived from the February 2000 Shuttle Radar Topography Mission (SRTM) has been one of the most important publicly available new spatial data sets in recent years. However, the 'finished' grade version of the data (also referred to as Version 2) still contains data voids (some 836,000 km2) - and other anomalies - that prevent immediate use in many applications. These voids can be filled using a range of interpolation algorithms in conjunction with other sources of elevation data, but there is little guidance on the most appropriate void-filling method. This paper describes: (i) a method to fill voids using a variety of interpolators, (ii) a method to determine the most appropriate void-filling algorithms using a classification of the voids based on their size and a typology of their surrounding terrain; and (iii) the classification of the most appropriate algorithm for each of the 3,339,913 voids in the SRTM data. Based on a sample of 1304 artificial but realistic voids across six terrain types and eight void size classes, we found that the choice of void-filling algorithm is dependent on both the size and terrain type of the void. Contrary to some previous findings, the best methods can be generalised as: kriging or inverse distance weighting interpolation for small and medium size voids in relatively flat low-lying areas; spline interpolation for small and medium-sized voids in high-altitude and dissected terrain; triangular irregular network or inverse distance weighting interpolation for large voids in very flat areas, and an advanced spline method (ANUDEM) for large voids in other terrains. Copyright Taylor & Francis Numéro de notice : A2007-553 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810601169899 En ligne : https://doi.org/10.1080/13658810601169899 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28916
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 983 - 1008[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Identifying components for interoperable process models using concept lattice and semantic reference system Type de document : Article/Communication Auteurs : L. Bian, Auteur ; S. Hu, Auteur Année de publication : 2007 Article en page(s) : pp 1009 - 1032 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] composant SIG
[Termes IGN] interopérabilité
[Termes IGN] modèle hydrographique
[Termes IGN] modèle sémantique de données
[Termes IGN] processusRésumé : (Auteur) The development of interoperable environmental process models is widely supported by both the research community and government agencies. This paper discusses a conceptual framework to guide the delineation of process components, the basic unit of interoperable models. The concepts of semantic reference system and dual hierarchy are explored to establish the conceptual framework. Based on this discussion, the Formal Concept Analysis is used as an analytical approach to decompose and fuse existing environmental process models in order to identify environmental process components. For purposes of discussion, a hydrological process, surface runoff, is used throughout the paper as an example of an environmental process to support the conceptual discussion and to illustrate the application of the conceptual framework and analytical approach. Copyright Taylor & Francis Numéro de notice : A2007-554 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810601169907 En ligne : https://doi.org/10.1080/13658810601169907 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28917
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 1009 - 1032[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : A rough set approach to the discovery of classification rules in spatial data Type de document : Article/Communication Auteurs : Yee Leung, Auteur ; T. Fung, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 1033 - 1058 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] base de règles
[Termes IGN] classification
[Termes IGN] données localisées
[Termes IGN] exploration de données géographiques
[Termes IGN] image Ikonos
[Termes IGN] outil de découverte de connaissances
[Termes IGN] raisonnement inductif
[Termes IGN] système d'information géographiqueRésumé : (Auteur) This paper proposes a novel rough set approach to discover classification rules in real-valued spatial data in general and remotely sensed data in particular. A knowledge induction process is formulated to select optimal decision rules with a minimal set of features necessary and sufficient for a remote sensing classification task. The approach first converts a real-valued or integer-valued decision system into an interval-valued information system. A knowledge induction procedure is then formulated to discover all classification rules hidden in the information system. Two real-life applications are made to verify and substantiate the conceptual arguments. It demonstrates that the proposed approach can effectively discover in remotely sensed data the optimal spectral bands and optimal rule set for a classification task. It is also capable of unraveling critical spectral band(s) discerning certain classes. The framework paves the road for data mining in mixed spatial databases consisting of qualitative and quantitative data. Copyright Taylor & Francis Numéro de notice : A2007-555 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810601169915 En ligne : https://doi.org/10.1080/13658810601169915 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28918
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 1033 - 1058[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Space-time opportunities for multiple agents: a constraint-based approach Type de document : Article/Communication Auteurs : T. Neutens, Auteur ; F. Witlox, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 1061 - 1076 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse spatio-temporelle
[Termes IGN] Autocad Map
[Termes IGN] migration pendulaire
[Termes IGN] programmation par contraintes
[Termes IGN] raisonnement spatiotemporel
[Termes IGN] système d'information géographique
[Termes IGN] système multi-agents
[Termes IGN] Time-geographyRésumé : (Auteur) Constraint-based models and models constructing accessibility measures mainly focus on single agents having only one available transport mode. However, numerous cases exist where multiple agents or groups of individuals with different available transport modes want to participate in a joint activity at a certain location. The aim of this paper is to provide new insights into representing and reasoning about feasible space-time opportunities for multiple agents. Relying on concepts of time geography, we propose a conceptual framework in order to determine interaction spaces for groups of individuals. Besides availability of means of transport and the locations of each individual, minimum activity duration and opening hours of opportunities are taken into account. The reasoning about space and time is visualized in three dimensions using a hybrid (CAD/GIS) system. Copyright Taylor & Francis Numéro de notice : A2007-556 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810601169873 En ligne : https://doi.org/10.1080/13658810601169873 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28919
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 1061 - 1076[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Temporal change in the landscape erosion pattern in the Yellow River basin Type de document : Article/Communication Auteurs : W. Siyuan, Auteur ; L. Jingshi, Auteur ; Y. Cunjian, Auteur Année de publication : 2007 Article en page(s) : pp 1077 - 1092 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] agriculture
[Termes IGN] bassin hydrographique
[Termes IGN] Chine
[Termes IGN] déboisement
[Termes IGN] détection de changement
[Termes IGN] érosion hydrique
[Termes IGN] Fleuve jaune (Chine)
[Termes IGN] gestion durable
[Termes IGN] image Landsat-TM
[Termes IGN] impact sur l'environnement
[Termes IGN] urbanisation
[Termes IGN] utilisation du solRésumé : (Auteur) Using Landsat TM data from 1995 and 2000, changes in the landscape erosion pattern of the Yellow River Basin, China were analysed. The aim was to improve our understanding of soil-erosion change so that sustainable land use could be established. First, a soil-erosion intensity index model was developed to study soil-erosion intensity change in the study area. Over the 5 years, the areas of weak erosion, moderate erosion, severe erosion, and very severe erosion all increased. The area of weak erosion increased dramatically by 7.94*105 ha, and areas of slight erosion and acute erosion decreased by 1.93*106 ha and 4.50*104 ha, respectively. The results show that while the intensity of soil erosion has gradually been decreasing as a whole, in some regions the soil erosion is becoming more severe. Based on landscape indices, the pattern of changes in soil erosion over the past 5 years was analysed. The changes in landscape pattern of soil erosion resulted from human activities. Analysis showed that human impact increases fragmentation, having three major effects on landscape pattern, reduction in patch area, variations in patch shape, and changes in spatial pattern. In the study area, population growth, farming, governmental policy and forest degradation are the major factors causing soil erosion change over a 5-year period. Copyright Taylor & Francis Numéro de notice : A2007-557 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810701228645 En ligne : https://doi.org/10.1080/13658810701228645 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28920
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 1077 - 1092[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Detection of spatial conflicts between rivers and contours in digital map updating Type de document : Article/Communication Auteurs : J. Chen, Auteur ; W. Liu, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 1093 - 1114 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] conflit d'espace
[Termes IGN] contour
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] mise à jour cartographique
[Termes IGN] placement automatique des objets
[Termes IGN] relation topologiqueRésumé : (Auteur) In the process of topographic map updating, spatial conflicts (inconsistency) between rivers and contours may be created. This project studies the particularity and complexity of the relationships between rivers and contours, and develops a method for automatic detection of the spatial conflicts between them. This method consists of a refined descriptive spatial model (called a topological chain), an algorithm for the computation of spatial relations, and a set of rules for the determination of spatial conflicts. In the spatial relation model, the topological relationships, order relationships, and metric relationships are integrated to describe the line-line spatial relationships. The rules are derived from the natural relations between rivers and contours in the real world. The effectiveness of this method has been verified by using the national 1:50 000 topographic map databases. An accuracy of 91% has been achieved. Copyright Taylor & Francis Numéro de notice : A2007-558 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810701300071 En ligne : https://doi.org/10.1080/13658810701300071 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28921
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 1093 - 1114[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Multi-visibility of triangulated terrains Type de document : Article/Communication Auteurs : N. Coll, Auteur ; M. Fort, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 1115 - 1134 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] base de données multi-représentation
[Termes IGN] point de visibilité
[Termes IGN] système d'information géographique
[Termes IGN] Triangulated Irregular Network
[Termes IGN] visibilité
[Termes IGN] visualisation cartographiqueRésumé : (Auteur) Visibility computation on terrain models is an important research topic with many applications in Geographical Information Systems. A multi-visibility map is the subdivision of the domain of a terrain into regions that, according to different criteria, encodes the visibility with respect to a set of view elements. We present an approach for visualising approximated multi-visibility maps of a triangulated terrain corresponding to a set of view elements by using graphics hardware. Our method supports heterogeneous sets of view elements containing points, segments, polygonal chains and polygons and works for weak and strong visibility. Moreover, we are also able to efficiently solve approximated point and polygonal region multi-visibility queries. To illustrate the usefulness of our approach we present results obtained with an implementation of the proposed algorithms. Copyright Taylor & Francis Numéro de notice : A2007-559 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810701300097 En ligne : https://doi.org/10.1080/13658810701300097 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28922
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 1115 - 1134[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : The potential for use of open source software and open specifications in creating web-based cross-border health spatial information systems Type de document : Article/Communication Auteurs : R. Moreno-Sanchez, Auteur ; G. Anderson, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 1135 - 1163 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] cartographie par internet
[Termes IGN] coopération transfrontalière
[Termes IGN] logiciel libre
[Termes IGN] logiciel SIG
[Termes IGN] partage de données localisées
[Termes IGN] prototype
[Termes IGN] santé
[Termes IGN] Web Feature Service
[Termes IGN] Web Map ServiceRésumé : (Auteur) Globalization is contributing to the blurring of borders making irrelevant the distinctions between domestic and international health problems. Cross-border and global health spatial information systems (CBHSIS) are required to address the new global health challenges. There is a need to build and document alternatives for addressing the technological, economic, and sociocultural-political challenges encountered in the creation and deployment of these systems. This paper documents the building of a prototype Web-based multimedia GIS system for use in a public health context using Open Source Software and Open Specifications and its deployment across the US-Mexico border. These technologies offer advantages in addressing several of the challenges previously mentioned. We highlight the technological and sociocultural-political issues important in successful collaboration across borders and cultures and in the creation of interoperable CBHSIS. Numéro de notice : A2007-560 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810701300113 En ligne : https://doi.org/10.1080/13658810701300113 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28923
in International journal of geographical information science IJGIS > vol 21 n° 9-10 (october 2007) . - pp 1135 - 1163[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-07061 RAB Revue Centre de documentation En réserve L003 Disponible 079-07062 RAB Revue Centre de documentation En réserve L003 Disponible
