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A software framework to create vector-topology in parallel GIS operations / M.J. Mineter in International journal of geographical information science IJGIS, vol 17 n° 3 (may 2003)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 17 n° 3 (may 2003) . - pp 203 - 222 Titre : A software framework to create vector-topology in parallel GIS operations Type de document : Article/Communication Auteurs : M.J. Mineter, Auteur Année de publication : 2003 Article en page(s) : pp 203 - 222 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] données vectorielles [Termes IGN] jeu de données localisées [Termes IGN] programmation informatique [Termes IGN] relation topologique [Termes IGN] système d'information géographique [Termes IGN] traitement parallèle Résumé : (Auteur) Parallel processing comprises the concurrent use of multiple processors to speed execution of one operation. Although techniques suited to most of the common geographical data models have been prototyped, the prominent exception has been vector topology. This paper explores whether operations that create a vectortopological dataset can benefit from parallelisation. It describes techniques for using multiple processors concurrently to create vectortopology for multiple subareas, and for stitching these subareas together to form the resultant dataset. To achieve performance gains over sequential processing, the overhead of the stitching must be less than the gains from the parallel processing of subareas. These methods are tested in the context of the conversion of raster data to polygonal vectortopology. Speedup in comparison to singleprocessor performance is achieved on both a 4processor sharedmemory Sun server and using up to 15 processors of a Cray T3E. The approach taken hides the parallelism and the management of the vectortopology in a software framework that simplifies the task of parallel application development. Numéro de notice : A2003-042 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810210149443 En ligne : https://doi.org/10.1080/13658810210149443 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22339 [article]

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