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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

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