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| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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| 057-2012011 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
Dépouillements
Ajouter le résultat dans votre panierAutomatic geospatial metadata generation for earth science virtual data products / P. Yue in Geoinformatica, vol 16 n° 1 (January 2012)
Titre : Automatic geospatial metadata generation for earth science virtual data products Type de document : Article/Communication Auteurs : P. Yue, Auteur ; J. Gong, Auteur ; L. Di, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 1 - 29 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] données localisées numériques
[Termes IGN] environnement géographique virtuel
[Termes IGN] flux de travaux
[Termes IGN] métadonnées
[Termes IGN] service web géographique
[Termes IGN] web sémantiqueRésumé : (Auteur) Recent advances in Semantic Web and Web Service technologies has shown promise for automatically deriving geospatial information and knowledge from Earth science data distributed over the Web. In a service-oriented environment, the data, information, and knowledge are often consumed or produced by complex, distributed geoscientific workflows or service chains. In order for the chaining results to be consumable, sufficient metadata for data products to be delivered by service chains must be provided. This paper proposes automatic generation of geospatial metadata for Earth science virtual data products. A virtual data product is represented using process models, and can be materialized on demand by dynamically binding and chaining archived data and services, as opposed to requiring that Earth science data products be physically archived. Semantics-enabled geospatial metadata is generated, validated, and propagated during the materialization of a virtual data product. The generated metadata not only provides a context in which end-users can interpret data products before intensive execution of service chains, but also assures semantic consistency of the service chains. Numéro de notice : A2012-080 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-011-0123-x Date de publication en ligne : 02/02/2011 En ligne : https://doi.org/10.1007/s10707-011-0123-x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31528
in Geoinformatica > vol 16 n° 1 (January 2012) . - pp 1 - 29[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-2012011 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : An evaluation of ontology matching in geo-service applications Type de document : Article/Communication Auteurs : L. Vaccari, Auteur ; Pavel Shvaiko, Auteur ; J. Pane, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 31 - 66 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] appariement sémantique
[Termes IGN] hétérogénéité sémantique
[Termes IGN] interopérabilité sémantique
[Termes IGN] ontologie
[Termes IGN] service web géographique
[Termes IGN] similitude sémantique
[Termes IGN] web sémantiqueRésumé : (Auteur) Matching between concepts describing the meaning of services representing heterogeneous information sources is a key operation in many application domains, including web service coordination, data integration, peer-to-peer information sharing, query answering, and so on. In this paper we present an evaluation of an ontology matching approach, specifically of structure-preserving semantic matching (SPSM) solution. In particular, we discuss the SPSM approach used to reduce the semantic heterogeneity problem among geo web services and we evaluate the SPSM solution on real world GIS ESRI ArcWeb services. The first experiment included matching of original web service method signatures to synthetically alterated ones. In the second experiment we compared a manual classification of our dataset to the automatic (unsupervised) classification produced by SPSM. The evaluation results demonstrate robustness and good performance of the SPSM approach on a large (ca. 700 000) number of matching tasks. Numéro de notice : A2012-081 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-011-0125-8 Date de publication en ligne : 30/03/2011 En ligne : https://doi.org/10.1007/s10707-011-0125-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31529
in Geoinformatica > vol 16 n° 1 (January 2012) . - pp 31 - 66[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-2012011 RAB Revue Centre de documentation En réserve L003 Disponible
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 spatialeRésumé : (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
in Geoinformatica > vol 16 n° 1 (January 2012) . - pp 67 - 110[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-2012011 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Reference model for a data grid approach to address data in a dynamic SDI Type de document : Article/Communication Auteurs : Serena Coetzee, Auteur Année de publication : 2012 Article en page(s) : pp 111 - 129 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] données localisées numériques
[Termes IGN] partage de données localiséesRésumé : (Auteur) A grid is concerned with the integration, virtualization, and management of services and resources in a distributed, heterogeneous environment that supports virtual organizations across traditional administrative and organizational domains. Spatial data infrastructures (SDI) aim to make spatial data from multiple sources available and usable to as wide an audience as possible. The first SDIs of the 1990s followed a top–down approach with the focus on data production and centralization. In recent years, SDIs have seen a huge increase in the number of participants, necessitating a more dynamic bottom-up approach. While much research has been done on web services and SDIs, research on the use of data grids for SDIs is limited. In this paper an emergency response scenario is presented to illustrate how the data grid approach can be used as a decentralized platform for address data in a dynamic SDI. Next, Compartimos (Spanish for ‘we share’) is presented, a reference model for an address data grid in an SDI based on the Open Grid Services Architecture (OGSA). Compartimos identifies the essential components and their capabilities required for a decentralized address data grid in a dynamic SDI. It deviates from the current centralized approach, allows data resources to come and go and node hosts to grow and shrink as necessary. An address data grid in an SDI is both a novel application for data grids as well as a novel technology in SDI environments and thus advances the mutual understanding between data grids and SDIs. In conclusion, additional research required for address data grids in SDIs is discussed. Numéro de notice : A2012-083 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-011-0129-4 Date de publication en ligne : 20/05/2011 En ligne : https://doi.org/10.1007/s10707-011-0129-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31531
in Geoinformatica > vol 16 n° 1 (January 2012) . - pp 111 - 129[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-2012011 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Provably correct and complete transaction rules for updating 3D city models Type de document : Article/Communication Auteurs : G. Groger, Auteur ; L. Plumer, Auteur Année de publication : 2012 Article en page(s) : pp 131 - 164 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] base de règles
[Termes IGN] CityGML
[Termes IGN] cohérence géométrique
[Termes IGN] exhaustivité des données
[Termes IGN] mise à jour de base de données
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] objet géographique complexeRésumé : (Auteur) The shapes of our cities change very frequently. These changes have to be reflected in data sets representing urban objects. However, it must be assured that frequent updates do not affect geometric-topological consistency. This important aspect of spatial data quality guarantees essential assumptions on which users and applications of 3D city models rely: viz. that objects do not intersect, overlap or penetrate mutually, or completely cover one another. This raises the question how to guarantee that geometric-topological consistency is preserved when data sets are updated. Hence, there is a certain risk that plans and decisions which are based on these data sets are erroneous and that the tremendous efforts spent for data acquisition and updates become vain. In this paper, we solve this problem by presenting efficient transaction rules for updating 3D city models. These rules guarantee that geometric-topological consistency is preserved (Safety) and allow for the generation of arbitrary consistent 3D city models (Completeness). Safety as well as completeness is proven with mathematical rigor, guaranteeing the reliability of our method. Our method is applicable to 3D city models, which define—besides the terrain surface—complex spatial objects like buildings with rooms and storeys as interior structures, as well as bridges and tunnels. Those objects are represented as aggregations of solids, and their surfaces are complex from a topology point of view. 3D GIS models like CityGML, which are widely used to represent cities, provide the means to define semantics, geometry and topology, but do not address the problem of maintaining consistency. Hence, our approach complements CityGML. Numéro de notice : A2012-084 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-011-0127-6 Date de publication en ligne : 25/05/2011 En ligne : https://doi.org/10.1007/s10707-011-0127-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31532
in Geoinformatica > vol 16 n° 1 (January 2012) . - pp 131 - 164[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-2012011 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : The SB-index and the HSB-index: efficient indices for spatial data warehouses Type de document : Article/Communication Auteurs : Thiago Luís Lopes Siqueira, Auteur ; Cristina Dutra de Aguiar Ciferri, Auteur ; Valéria Cesário Times, Auteur ; Ricardo Rodrigues Ciferri, Auteur Année de publication : 2012 Article en page(s) : pp 165 - 205 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] entrepôt de données localisées
[Termes IGN] format BITMAP
[Termes IGN] index spatial
[Termes IGN] indexation spatiale
[Termes IGN] SOLAPRésumé : (Auteur) Spatial data warehouses (SDWs) allow for spatial analysis together with analytical multidimensional queries over huge volumes of data. The challenge is to retrieve data related to ad hoc spatial query windows according to spatial predicates, avoiding the high cost of joining large tables. Therefore, mechanisms to provide efficient query processing over SDWs are essential. In this paper, we propose two efficient indices for SDW: the SB-index and the HSB-index. The proposed indices share the following characteristics. They enable multidimensional queries with spatial predicate for SDW and also support predefined spatial hierarchies. Furthermore, they compute the spatial predicate and transform it into a conventional one, which can be evaluated together with other conventional predicates by accessing a star-join Bitmap index. While the SB-index has a sequential data structure, the HSB-index uses a hierarchical data structure to enable spatial objects clustering and a specialized buffer-pool to decrease the number of disk accesses. The advantages of the SB-index and the HSB-index over the DBMS resources for SDW indexing (i.e. star-join computation and materialized views) were investigated through performance tests, which issued roll-up operations extended with containment and intersection range queries. The performance results showed that improvements ranged from 68% up to 99% over both the star-join computation and the materialized view. Furthermore, the proposed indices proved to be very compact, adding only less than 1% to the storage requirements. Therefore, both the SB-index and the HSB-index are excellent choices for SDW indexing. Choosing between the SB-index and the HSB-index mainly depends on the query selectivity of spatial predicates. While low query selectivity benefits the HSB-index, the SB-index provides better performance for higher query selectivity. Numéro de notice : A2012-085 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-011-0128-5 Date de publication en ligne : 14/06/2011 En ligne : https://doi.org/10.1007/s10707-011-0128-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31533
in Geoinformatica > vol 16 n° 1 (January 2012) . - pp 165 - 205[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-2012011 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Integrating GI with non-GI services — showcasing interoperability in a heterogeneous service-oriented architecture Type de document : Article/Communication Auteurs : M. Treiblmayr, Auteur ; Simon Scheider, Auteur ; A. Kruger, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 207 - 220 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] architecture orientée services
[Termes IGN] hétérogénéité sémantique
[Termes IGN] interopérabilité
[Termes IGN] logiciel de gestion intégrée
[Termes IGN] ontologie
[Termes IGN] service web
[Termes IGN] service web géographiqueRésumé : (Auteur) The concept of a service-oriented architecture provides a technical foundation for delivering, using, and integrating software. It can serve as an approach to integrate GIS with other, non-GIS applications. This paper presents and discusses a service-oriented architecture that embraces a GIS and an enterprise resource planning system. The two information systems make mutually required functionalities available as services. This defines the showcase for making GI and non-GI services syntactically and semantically interoperable. The services-based integration leverages open-standard interfacing and, thus, removes syntactic heterogeneity. The integration is discussed in terms of an emergency management scenario. This scenario also helps to outline challenging semantic interoperability issues. When services provided by GIS and non-GIS applications interact, the problem arises how their different conceptualizations should be mapped. This paper analyzes essential ontological distinctions for mapping conceptual schemes in GI locator services and non-GI services. It proposes a hybrid decentralized approach of concept mapping, based on a common top-level ontology. Numéro de notice : A2012-086 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-011-0132-9 Date de publication en ligne : 29/06/2011 En ligne : https://doi.org/10.1007/s10707-011-0132-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31534
in Geoinformatica > vol 16 n° 1 (January 2012) . - pp 207 - 220[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-2012011 RAB Revue Centre de documentation En réserve L003 Disponible
