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Service chaining architectures for applications implementing distributed geographic information processing / Anders Friis-Christensen in International journal of geographical information science IJGIS, vol 23 n° 5 (may 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n° 5 (may 2009) . - pp 561 - 580 Titre : Service chaining architectures for applications implementing distributed geographic information processing Type de document : Article/Communication Auteurs : Anders Friis-Christensen, Auteur ; R. Lucchi, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 561 - 580 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] architecture orientée services [Termes IGN] base de données répartie [Termes IGN] flux de données [Termes IGN] incendie de forêt [Termes IGN] interopérabilité [Termes IGN] logiciel de navigation [Termes IGN] risque majeur [Termes IGN] risque naturel [Termes IGN] standard OGC [Termes IGN] traitement réparti Résumé : (Auteur) Service-Oriented Architectures can be used as a framework for enabling distributed geographic information processing (DGIP). The Open Geospatial Consortium (OGC) has published several standards for services. These can be composed into service chains that support the execution of workflows constituting complex DGIP applications. In this paper, we introduce a basic architecture and building blocks for building DGIP applications based on service chains. We investigate the issues arising from the composition of OGC services into such service chains. We study various architectural patterns in order to guide application developers in their task of implementing DGIP applications based on service chains. More specifically, we focus on the control flow and data flow patterns in the execution of a workflow. These issues are illustrated with an example from the domain of risk management - a forest fire risk mapping scenario. Copyright Taylor & Francis Numéro de notice : A2009-298 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : 10.1080/13658810802665570 En ligne : https://doi.org/10.1080/13658810802665570 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29928 [article]

Exemplaires(2)

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079-09032	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Use of grid computing modeling virtual geospatial products / A. Chen in International journal of geographical information science IJGIS, vol 23 n° 5 (may 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n° 5 (may 2009) . - pp 581 - 604 Titre : Use of grid computing modeling virtual geospatial products Type de document : Article/Communication Auteurs : A. Chen, Auteur ; L. Di, Auteur ; Y. Wei, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 581 - 604 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] base de données répartie [Termes IGN] données localisées [Termes IGN] environnement géographique virtuel [Termes IGN] géomatique web [Termes IGN] informatique en grille [Termes IGN] modèle logique de données [Termes IGN] modélisation spatiale [Termes IGN] moteur de recherche [Termes IGN] produit informatique [Termes IGN] traitement réparti [Termes IGN] XML Résumé : (Auteur) Earth science research and applications usually use Distributed Geospatial Information Processing (DGIP) services and powerful computing capabilities to extract information and knowledge from large volumes of distributed geospatial data. Conceptually, such processing can be abstracted into a logical model that utilizes geospatial domain knowledge to produce new geospatial products. Using this idea, the geo-tree concept and the proposed geospatial Abstract Information Model (AIM) have been used to develop a Grid workflow engine complying with geospatial standards and the Business Process Execution Language. Upon a user's request, the engine generates virtual geospatial data/information/knowledge products from existing DGIP data and services. This article details how to (1) define and describe the AIM in XML format, (2) describe the process logically with an AIM, including the geospatial semantic logic, (3) conceptually describe the process of producing a particular geospatial product step by step from raw geospatial data, (4) instantiate AIM as a concrete Grid-service workflow by selecting the optimal service instances and data sets, and (5) design a Grid workflow engine to execute the concrete workflows to produce geospatial products. To verify the advantages and applicability of this Grid-enabled virtual geospatial product system, its performance is evaluated, and a sample application is provided. Copyright Taylor & Francis Numéro de notice : A2009-299 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810902733666 En ligne : https://doi.org/10.1080/13658810902733666 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29929 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-09031	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-09032	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Developing a grid-enabled spatial Web portal for Internet GIServices and geospatial cyberinfrastructure / T. Zhang in International journal of geographical information science IJGIS, vol 23 n° 5 (may 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n° 5 (may 2009) . - pp 605 - 630 Titre : Developing a grid-enabled spatial Web portal for Internet GIServices and geospatial cyberinfrastructure Type de document : Article/Communication Auteurs : T. Zhang, Auteur ; M.H. Tsou, Auteur Année de publication : 2009 Article en page(s) : pp 605 - 630 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] architecture de système [Termes IGN] données localisées [Termes IGN] géomatique web [Termes IGN] informatique en grille [Termes IGN] portail [Termes IGN] service web géographique Résumé : (Auteur) Geospatial cyberinfrastructure integrates distributed geographic information processing (DGIP) technology, high-performance computing resources, interoperable Web services, and sharable geographic knowledge to facilitate the advancement of geographic information science (GIScience) research, geospatial technology, and geographic education. This article addresses three major development issues of geospatial cyberinfrastructure: the performance of grid-enabled DGIP services, the integration of Internet GIService resources, and the technical challenges of spatial Web portal implementation. A four-tier grid-enabled Internet GIService framework was designed for geospatial cyberinfrastructure. The advantages of the grid-enabled framework were demonstrated by a spatial Web portal. The spatial Web portal was implemented based on current available Internet technologies and utilizes multiple computing resources and high-performance systems, including local PC clusters and the TeraGrid. By comparing their performance testing results, we found that grid computing (TeraGrid) is more powerful and flexible than local PC clusters. However, job queuing time and relatively poor performance of cross-site computation are the major obstacles of grid computing for geospatial cyberinfrastructure. Detailed analysis of different computational settings and performance testing contributes to a deeper understanding of the improvements of DGIP services and geospatial cyberinfrastructure. This research demonstrates that resource/service integration and performance improvement can be accomplished by deploying the new four-tier grid-enabled Internet GIService framework. This article also identifies four research priorities for developing geospatial cyberinfrastructure: the design of GIS middleware, high-performance geovisualization methods, semantic GIService, and the integration of multiple GIS grid applications. Copyright Taylor & Francis Numéro de notice : A2009-300 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810802698571 En ligne : https://doi.org/10.1080/13658810802698571 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29930 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-09031	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-09032	RAB	Revue	Centre de documentation	En réserve L003	Disponible

TeraGrid GIScience Gateway: Bridging cyberinfrastructure and GIScience / Shaowen Wang in International journal of geographical information science IJGIS, vol 23 n° 5 (may 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n° 5 (may 2009) . - pp 631 - 656 Titre : TeraGrid GIScience Gateway: Bridging cyberinfrastructure and GIScience Type de document : Article/Communication Auteurs : Shaowen Wang, Auteur ; Y. Liu, Auteur Année de publication : 2009 Article en page(s) : pp 631 - 656 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] analyse spatiale [Termes IGN] architecture orientée services [Termes IGN] base de données répartie [Termes IGN] cyberinfrastructure [Termes IGN] découverte de connaissances [Termes IGN] géomatique web [Termes IGN] traitement parallèle [Termes IGN] traitement réparti [Termes IGN] web 2.0 [Termes IGN] WebSIG Résumé : (Auteur) Cyberinfrastructure (CI) represents the integrated information and communication technologies for distributed information processing and coordinated knowledge discovery, and is promising to revolutionize how science and engineering are conducted in the twenty-first century. The value of bridging CI and GIScience is significant to advance CI and benefit GIScience research and education, particularly in distributed geographic information processing (DGIP). This article presents a holistic framework that bridges CI and GIScience by integrating CI capabilities to empower GIScience research and education and establish generic DGIP services supported by CI. The framework, the TeraGrid GIScience Gateway, is based on a CI science gateway approach developed on the National Science Foundation (NSF) TeraGrid - a key element of US and world CI. This gateway develops a unifying service-oriented framework with respect to its architecture, design, and implementation as well as its integration with the TeraGrid. The functions of the gateway focus on enabling parallel and distributed processing for geographical analysis, managing the complexity of TeraGrid software environment, and establishing a Web-based GIS for the GIScience community to gain shared and collaborative access to TeraGrid-based geospatial processing services. The gateway implementation uses Web 2.0 technologies to create a highly configurable and interactive multiuser environment. Two case studies, Bayesian geostatistical modeling and a spatial statistic Gi(d) for detecting local clustering, are used to demonstrate the gateway functions and user environment. The service transformation for these analyses is applied to create a shared, decentralized, and collaborative geographical analysis environment in which GIScience community users can contribute new analysis services and reuse existing gateway services. Copyright Taylor & Francis Numéro de notice : A2009-301 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810902754977 En ligne : https://doi.org/10.1080/13658810902754977 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29931 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-09031	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-09032	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Interoperability of functions in environmental models: a case study in hydrological modeling / S. Hu in International journal of geographical information science IJGIS, vol 23 n° 5 (may 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n° 5 (may 2009) . - pp 657 - 681 Titre : Interoperability of functions in environmental models: a case study in hydrological modeling Type de document : Article/Communication Auteurs : S. Hu, Auteur ; L. Bian, Auteur Année de publication : 2009 Article en page(s) : pp 657 - 681 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] bibliothèque logicielle [Termes IGN] interopérabilité [Termes IGN] modèle hydrographique [Termes IGN] référentiel sémantique [Termes IGN] ruissellement [Termes IGN] structure hiérarchique de données Résumé : (Auteur) The monolithic structure of process-based environmental models has become a major obstacle in dealing with complex environmental problems. Interoperability is the inevitable direction for future generations of models. This article discusses the identification of equation functions for interoperable environmental models. These equations represent environmental processes that are implemented as algorithms in the models. The identification of common equations in existing models helps develop equation components that can be assembled to form customized models. In the context of a semantic reference system, formal concept analysis is used to decompose existing models, extract the common equations embedded in them, and organize these equations in a hierarchy of a concept lattice. The hierarchical structure of the lattice helps identify the relationships between equations across different levels and within the same level. Insights drawn from the concept lattice provide valuable information for the framework design of customized models and the adaptation of algorithms from existing models for the development of equation components. An important hydrological process, surface runoff, is used as an example of an environmental process to illustrate the analysis. To support the discussion, a customized surface runoff model is built using three components extracted from several existing hydrological models to predict surface runoff of a watershed. Copyright Taylor & Francis Numéro de notice : A2009-302 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810902733674 En ligne : https://doi.org/10.1080/13658810902733674 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29932 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-09031	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-09032	RAB	Revue	Centre de documentation	En réserve L003	Disponible