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Distributed and parallel architectures for spatial data / Alberto Belussi (2020)  

Public Titre : Distributed and parallel architectures for spatial data Type de document : Monographie Auteurs : Alberto Belussi, Éditeur scientifique ; Sara Migliorini, Éditeur scientifique ; Damiano Carra, Éditeur scientifique ; et al., Auteur Editeur : Bâle [Suisse] : Multidisciplinary Digital Publishing Institute MDPI Année de publication : 2020 Importance : 170 p. ISBN/ISSN/EAN : 978-3-03936-751-1 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] base de données localisées [Termes IGN] collecte de données [Termes IGN] développement durable [Termes IGN] données localisées [Termes IGN] données massives [Termes IGN] entrepôt de données localisées [Termes IGN] géoportail [Termes IGN] Hadoop [Termes IGN] métadonnées [Termes IGN] modèle numérique de surface [Termes IGN] objet mobile [Termes IGN] OLAP [Termes IGN] OpenStreetMap [Termes IGN] PostGIS [Termes IGN] réseau social [Termes IGN] SQL [Termes IGN] système d'information géographique [Termes IGN] téléphone intelligent [Termes IGN] traitement parallèle [Termes IGN] zone tampon Résumé : (Editeur) [Préface] In recent years, an increasing amount of spatial data has been collected by different types of devices, such as mobile phones, sensors, satellites, space telescope, and medical tools for analysis, or is generated by social networks, such as geotagged tweets. The processing of this huge amount of information, including spatial properties, which are frequently represented in heterogeneous ways, is a challenging task that has boosted research in the big data area in an attempt to investigate cases and propose new solutions for dealing with its peculiarities. In the literature, many different proposals and approaches for facing the problem have been proposed, addressing different goals and different types of users. However, most are obtained by customizing existing approaches which were originally developed for the processing of big data of the alphanumeric type, without any specific support for spatial or spatiotemporal properties. Thus, the proposed solutions can exploit the parallelism provided by these kinds of systems, but without taking into account, in a proficient way, the space and time dimensions that intrinsically characterize the analyzed datasets. As described in the literature, current solutions include: (i) the on-top approach, where an underlying system for traditional big datasets is used as a black box while spatial processing is added through the definition of user-defined functions that are specified on top of the underlying system; (ii) the from-scratch approach, where a completely new system is implemented for a specific application context; and (iii) the built-in approach, where an existing solution is extended by injecting spatial data functions into its core. This book aims at promoting new and innovative studies, proposing new architectures or innovative evolutions of existing ones, and illustrating experiments on current technologies in order to improve the efficiency and effectiveness of distributed and cluster systems when they deal with spatiotemporal data. Note de contenu : Preface 1- Distributed Processing of Location-Based Aggregate Queries Using MapReduce 2- Towards the Development of Agenda 2063 Geo-Portal to Support Sustainable Development in Africa 3- HiBuffer: Buffer Analysis of 10-Million-Scale Spatial Data in Real Time 4- Mobility DataWarehouses 5- Parallelizing Multiple Flow Accumulation Algorithm using CUDA and OpenACC 6- LandQv2: A MapReduce-Based System for Processing Arable Land Quality Big Data 7- Mr4Soil: A MapReduce-Based Framework Integrated with GIS for Soil Erosion Modelling 8- High-Performance Geospatial Big Data Processing System Based on MapReduce Numéro de notice : 25884 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Monographie DOI : 10.3390/books978-3-03936-751-1 En ligne : https://doi.org/10.3390/books978-3-03936-751-1 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95762

A framework for integrating multi-accuracy spatial data in geographical applications / Alberto Belussi in Geoinformatica, vol 16 n° 3 (July 2012)  

Public [article]  inGeoinformatica > vol 16 n° 3 (July 2012) . - pp 523 - 561 Titre : A framework for integrating multi-accuracy spatial data in geographical applications Type de document : Article/Communication Auteurs : Alberto Belussi, Auteur ; Sara Migliorini, Auteur Année de publication : 2012 Article en page(s) : pp 523 - 561 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] données multisources [Termes IGN] filtre de Kalman [Termes IGN] infrastructure nationale des données localisées [Termes IGN] intégration de données [Termes IGN] qualité des données Résumé : (Auteur) In recent years the integration of spatial data coming from different sources has become a crucial issue for many geographical applications, especially in the process of building and maintaining a Spatial Data Infrastructure (SDI). In such context new methodologies are necessary in order to acquire and update spatial datasets by collecting new measurements from different sources. The traditional approach implemented in GIS systems for updating spatial data does not usually consider the accuracy of these data, but just replaces the old geometries with the new ones. The application of such approach in the case of an SDI, where continuous and incremental updates occur, will lead very soon to an inconsistent spatial dataset with respect to spatial relations and relative distances among objects. This paper addresses such problem and proposes a framework for representing multi-accuracy spatial databases, based on a statistical representation of the objects geometry, together with a method for the incremental and consistent update of the objects, that applies a customized version of the Kalman filter. Moreover, the framework considers also the spatial relations among objects, since they represent a particular kind of observation that could be derived from geometries or be observed independently in the real world. Spatial relations among objects need also to be compared in spatial data integration and we show that they are necessary in order to obtain a correct result in merging objects geometries. Numéro de notice : A2012-109 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-011-0140-9 Date de publication en ligne : 20/10/2011 En ligne : https://doi.org/10.1007/s10707-011-0140-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31557 [article]

Exemplaires(1)

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057-2012031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Topological operators: a relaxed query processing approach / Alberto Belussi in Geoinformatica, vol 16 n° 1 (January 2012)  

Public [article]  inGeoinformatica > vol 16 n° 1 (January 2012) . - pp 67 - 110 Titre : Topological operators: a relaxed query processing approach Type de document : Article/Communication Auteurs : Alberto Belussi, Auteur ; Barbara Catania, Auteur ; P. Podesta, Auteur Année de publication : 2012 Article en page(s) : pp 67 - 110 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] opérateur spatial [Termes IGN] relation topologique [Termes IGN] requête spatiale Résumé : (Auteur) Relaxation and approximation techniques have been proposed as approaches for improving the quality of query results, in terms of completeness and accuracy, in environments where the user may not be able to specify the query in a complete and exact way, since data are quite heterogeneous or she may not know all the characteristics of data at hand. This problem, mainly addressed for relational and XML data, is nowadays quite relevant also for geo-spatial data, due to their increasing usage in highly critical decisional processes. Among geo-spatial queries, those based on spatial and more precisely topological relations are currently used in an increasing number of applications. As far as we know, no approach has been proposed so far for relaxing queries based on topological predicates when they return an empty or insufficient answer, in order to improve result quality and user satisfaction. In this paper, we consider this problem and we present a general relaxation strategy for, possibly multi-domain, topological selection and join queries. Two specific semantics are also provided: the first applies the minimum amount of relaxation in order to get an acceptable answer; the second relaxes the given query of a certain fixed amount, depending on the considered topological predicate. Index-based processing algorithms, for efficiently executing relaxed queries based on the proposed semantics, are also presented and a specific topological similarity function, to be used for relaxation purposes, is proposed. Experimental results show that the overhead given by query relaxation is acceptable. Numéro de notice : A2012-082 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-011-0124-9 Date de publication en ligne : 10/05/2011 En ligne : https://doi.org/10.1007/s10707-011-0124-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31530 [article]

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057-2012011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Time component in GIS: management of data changes in geo databases / Alberto Belussi in GIM international, vol 13 n° 7 (July 1999)

Public [article]  inGIM international > vol 13 n° 7 (July 1999) . - pp 41 - 43 Titre : Time component in GIS: management of data changes in geo databases Type de document : Article/Communication Auteurs : Alberto Belussi, Auteur ; M. Negri, Auteur ; Giuseppe Pelagatti, Auteur Année de publication : 1999 Article en page(s) : pp 41 - 43 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] base de données localisées [Termes IGN] mise à jour de base de données [Termes IGN] SIG temporel [Termes IGN] système d'information géographique [Termes IGN] temps Résumé : (Editeur) In the process of updating a geo-database, loss occurs of the past state of the database. Many applications require occasional data concerning the past. How can the past be retained in geographical databases ? Some solutions to this problem are here proposed with reference to geo-relational systems. Numéro de notice : A1999-146 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26345 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
061-99071	RAB	Revue	Centre de documentation	En réserve L003	Disponible