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Auteur Theodor Foerster |
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Affiner la recherche Interroger des sources externesAbstracting geographic information in a data rich world, ch. 7. Process modelling, web services and geoprocessing / Nicolas Regnauld (2014)
Titre de série : Abstracting geographic information in a data rich world, ch. 7 Titre : Process modelling, web services and geoprocessing Type de document : Chapitre/Contribution Auteurs : Nicolas Regnauld Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2014 Collection : Lecture notes in Geoinformation and Cartography, ISSN 1863-2246 Importance : pp 198 - 225 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] complexité
[Termes IGN] généralisation automatique de données
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] modélisation de processus
[Termes IGN] service web géographiqueMots-clés libres : orchestration web-service Résumé : (auteur) Process modelling has always been an important part of research in generalisation. In the early days this would take the form of a static sequence of generalisation actions, but currently the focus is on modelling much more complex processes, capable of generalising geographic data into various maps according to specific user requirements. To channel the growing complexity of the processes required, better process models had to be developed. This chapter discusses several aspects of the problem of building such systems. As the system gets more complex, it becomes important to be able to reuse components which already exist. Web services have been used to encapsulate generalisation processes in a way that maximises their interoperability and therefore reusability. However, for a system to discover and trigger such a service, it needs to be formalised and described in a machine understandable way, and the system needs to have the knowledge about where and when to use such tools. This chapter therefore explores the requirements and potential approaches to the design and building of such systems. Numéro de notice : H2014-016 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Chapître / contribution nature-HAL : ChOuvrScient DOI : 10.1007/978-3-319-00203-3_7 Date de publication en ligne : 01/04/2014 En ligne : http://dx.doi.org/10.1007/978-3-319-00203-3_7 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78572 Matching INSPIRE quality of service requirements with hybrid clouds / B. Baranski in Transactions in GIS, vol 15 supplement s1 (July 2011)
Titre : Matching INSPIRE quality of service requirements with hybrid clouds Type de document : Article/Communication Auteurs : B. Baranski, Auteur ; B. Schäffer, Auteur ; Theodor Foerster, Auteur ; K. Lange, Auteur Année de publication : 2011 Article en page(s) : pp 125 - 142 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] base de données répartie
[Termes IGN] données localisées des bénévoles
[Termes IGN] implémentation (informatique)
[Termes IGN] informatique en nuage
[Termes IGN] infrastructure nationale des données localisées
[Termes IGN] intégration de données
[Termes IGN] qualité de serviceRésumé : (Auteur) A lot of effort has been invested in Spatial Data Infrastructures (SDIs) during the last decade regarding interoperable standards for services and data. But still the scalability and performance of SDI services is reported to be crucial especially if they are accessed concurrently by a high number of users. Furthermore, laws and provisions such as the INSPIRE directive specify challenging requirements regarding the performance, availability and scalability of SDI services. This article presents a Hybrid Cloud architecture for matching INSPIRE-related Quality of Service (QoS) requirements, without investing in rarely used hardware in advance, by occupying external third-party resources on a pay-as-you-go basis. The presented Hybrid Cloud is a composition of a local IT-infrastructure (Private Cloud) and the computational resources of third-party vendors (Public Cloud). The local infrastructure is laid out to handle the average main load of a service and in lasting peak times additional resources of external providers are allocated and integrated on demand into the local infrastructure to provide sufficient service quality automatically. A proof-of-concept implementation of the proposed Hybrid Cloud approach is evaluated and benchmarked with respect to INSPIRE-related QoS requirements. Numéro de notice : A2011-254 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2011.01265.x Date de publication en ligne : 09/06/2011 En ligne : https://doi.org/10.1111/j.1467-9671.2011.01265.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31032
in Transactions in GIS > vol 15 supplement s1 (July 2011) . - pp 125 - 142[article]
Titre : On-demand base maps on the web generalized according to user profiles Type de document : Article/Communication Auteurs : Theodor Foerster, Auteur ; Jantien E. Stoter, Auteur ; Peter J. M. Van Oosterom, Auteur Année de publication : 2011 Article en page(s) : pp 1 - 23 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] carte sur mesure
[Termes IGN] couche thématique
[Termes IGN] généralisation automatique de données
[Termes IGN] spécification de contenu
[Termes IGN] web mappingRésumé : (Auteur) Thematic content in the form of geodata is becoming increasingly available on the web. However, adequate base map information to support appropriate communication of the thematic content is not available in many cases. This base map information might be served through topographic databases available on the web and optimized by means of automated generalization. This article describes an approach based on user profiles, which formally captures the user requirements (preferences) towards the base map and deploys those profiles in a web-based architecture to generate on-demand maps. Those user profiles, which may differ per user, drive the generalization process and produce base maps on demand by taking into account the user requirements as well as the thematic content. The research in this article specifically focuses on the technological environment that generates on-demand base maps incorporating four basic concepts in the user profile: (1) topology awareness between the base map and the thematic content, (2) user-specific base map information at a non-uniform scale to improve the communication of the thematic content, (3) the map specification and (4) inheritance of user profiles. Both existing and new techniques are explored to realize the environment. The approach is evaluated by applying it to a project in the Netherlands dedicated to disseminating physical planning maps through the web. Numéro de notice : A2011-567 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658816.2010.488239 En ligne : https://doi.org/10.1080/13658816.2010.488239 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79396
in International journal of geographical information science IJGIS > vol 25 n° 1-2 (january - february 2011) . - pp 1 - 23[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 079-2011012 RAB Revue Centre de documentation En réserve L003 Disponible 079-2011011 SL Revue Centre de documentation Revues en salle Disponible Web-based architecture for on-demand maps - integrating meaningful generalization processing / Theodor Foerster (2010)
Titre : Web-based architecture for on-demand maps - integrating meaningful generalization processing Type de document : Thèse/HDR Auteurs : Theodor Foerster, Auteur Editeur : Enschede [Pays Bas] : University of Twente Année de publication : 2010 Collection : ITC Dissertation num. 165 Importance : 193 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-90-6164-285-5 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] carte sur mesure
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] programmation par contraintes
[Termes IGN] service web géographique
[Termes IGN] web mappingRésumé : (auteur) Generating readable maps at a specific scale and for a specific use is a chal-lenge in research and practice. With the advent of the web as a platform for accessing and sharing information between users, maps also became web-accessible. The web provides the means to generate and disseminate maps for specific users (i.e. on-demand). Providing on-demand maps is considered to improve map communication. In this context, automated generalization is one solution to generate these on-demand maps.
Currently, thematic content such as physical plans becomes available on the web and displayed as maps. These maps are available as separate layers without a base map. Thereby they are in need of an on-demand base map, which might be generated regarding the thematic content and the specific user. In the case of physical planning on-demand base maps enhance the communication of the thematic content and thereby improve the communication process between the planning authorities and the public.
However, a web-based architecture to generate and disseminate on-demand base maps has not been proposed yet. Regarding the aspect of disseminating on-demand base maps on the web, the thesis investigates how to formulate user requirements towards the on-demand base map in such an environment. These user requirements are captured in so-called user profiles, which are formalized in UML and XML-models. The on-demand base map is generated according to these user profiles and according to the specific thematic content. As core of the architecture, a so-called generalization-enabled Web Map Service is presented, which consumes these user profiles and generates the base maps accordingly. The architecture is implemented as a proof-of-concept and is applied to the use case of physical planning in the Netherlands.
Besides the aim of disseminating these on-demand base maps on the web, the web is also promising to serve as a platform for web-based generalization. Such web-based processes are performed by Web Services. Establishing web-based meaningful generalization processing, the semantic interoperability of these Web Services has to be enabled, which is considered to be a challenge for research. In particular, this thesis proposes a classification of generalization operators, which is formalized in the Object Constraint Language and deployed using the Web Processing Service interface and so-called WPS profiles.
This research contributes to on-demand web mapping and to automated generalization on the web. Designing user profiles to describe generalization-specific requirements and incorporating them into a web-based architecture is a novelty for web mapping. The user profiles thereby enable the on-demand notion and are a complementary approach to the already established OGC Styled Layer Descriptor documents (for symbolization) and OGC Web Map Context (for map content definition) documents as they define user-specific issues regarding scale and the link between thematic content and the base map. Defining user profiles for the application of base maps is a novel approach in itself. Generating base maps by automated generalization has not been attempted so far. The user requirements define the thematic content as input for the generalization of the base map, which is also a novelty. The generalization-enabled WMS is the component which provides the on-demand base map in a standards-compliant way based on the specific user profile. Additionally, this research contributes to the meaningful integration of generalization processes on the web. In particular, this research contributes to the theory of automated generalization by providing a classification of generalization operators. Further, this research contributes to the issue of semantic interoperability of Web Generalization Services as it formalizes the classification using standardized data models of ISO and OGC and finally proposes the application of WPS profiles and the Object Constraint Language. Using standardized data models, this classification is extensible and comprehensible for future research. The application of WPS profiles and the Object Constraint Language is not only a novelty to generalization research and Web Generalization Services, but also contributes to the aspect of web-based geoprocessing in general.Numéro de notice : 17000 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Thèse étrangère Note de thèse : PhD thesis : : University of Twente : 2010 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78942 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 17000-01 K325 Livre LASTIG Dépôt en unité Exclu du prêt Documents numériques
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Web-based architecture for on-demand mapsAdobe Acrobat PDF
