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Ontology-based descriptions for semantic discovery and composition of geoprocessing services / M. Lutz in Geoinformatica, vol 11 n° 1 (March - May 2007)  

Public [article]  inGeoinformatica > vol 11 n° 1 (March - May 2007) . - pp 1 - 36 Titre : Ontology-based descriptions for semantic discovery and composition of geoprocessing services Type de document : Article/Communication Auteurs : M. Lutz, Auteur Année de publication : 2007 Article en page(s) : pp 1 - 36 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] accès aux données localisées [Termes IGN] données localisées [Termes IGN] implémentation (informatique) [Termes IGN] infrastructure nationale des données localisées [Termes IGN] ontologie [Termes IGN] OWL [Termes IGN] prototype [Termes IGN] service web géographique [Termes IGN] service web sémantique Résumé : (Auteur) The ability to process geospatial data will be a great benefit for spatial data infrastructures. This requires the ability to compose data providing services with geoprocessing services. Discovering suitable geoprocessing services is a major challenge in this endeavour. Current (keyword-based) approaches to service discovery are inherently restricted by the ambiguities of natural language, which can lead to low precision and/or recall. To alleviate these problems, we propose to use an ontology-based approach to GI service discovery, which rests on two ideas. Ontologies describing geospatial operations are used to create descriptions of requirements and service capabilities; matches between these descriptions are identified based on function subtyping. We use a running example from the geospatial domain to analyse which problems can occur in existing keyword- and ontology-based approaches and how the discovery of geoprocessing services differs from other service discovery tasks. The example is also used for illustrating the prototypical implementation of the proposed approach. Numéro de notice : A2007-164 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-006-7635-9 En ligne : https://doi.org/10.1007/s10707-006-7635-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28527 [article]

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LiDAR-derived high quality ground control information and DEM for image orthorectification / X. Liu in Geoinformatica, vol 11 n° 1 (March - May 2007)  

Public [article]  inGeoinformatica > vol 11 n° 1 (March - May 2007) . - pp 37 - 53 Titre : LiDAR-derived high quality ground control information and DEM for image orthorectification Type de document : Article/Communication Auteurs : X. Liu, Auteur ; Z. Zhang, Auteur ; J. Peterson, Auteur ; S. Chandra, Auteur Année de publication : 2007 Article en page(s) : pp 37 - 53 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Orthophotographie, orthoimage [Termes IGN] données lidar [Termes IGN] ERDAS Imagine [Termes IGN] géoréférencement [Termes IGN] image numérisée [Termes IGN] lasergrammétrie [Termes IGN] modèle numérique de surface [Termes IGN] orthoimage [Termes IGN] orthoimage intégrale [Termes IGN] orthorectification [Termes IGN] point d'appui [Termes IGN] Victoria (Australie) Résumé : (Auteur) Orthophotos (or orthoimages if in digital form) have long been recognised as a supplement or alternative to standard maps. The increasing applications of orthoimages require efforts to ensure the accuracy of produced orthoimages. As digital photogrammetry technology has reached a stage of relative maturity and stability, the availability of high quality ground control points (GCPs) and digital elevation models (DEMs) becomes the central issue for successfully implementing an image orthorectification project. Concerns with the impacts of the quality of GCPs and DEMs on the quality of orthoimages inspire researchers to look for more reliable approaches to acquire high quality GCPs and DEMs for orthorectification. Light Detection and Ranging (LiDAR), an emerging technology, offers capability of capturing high density three dimensional points and generating high accuracy DEMs in a fast and cost-effective way. Nowadays, highly developed computer technologies enable rapid processing of huge volumes of LiDAR data. This leads to a great potential to use LiDAR data to get high quality GCPs and DEMs to improve the accuracy of orthoimages. This paper presents methods for utilizing LiDAR intensity images to collect high accuracy ground coordinates of GCPs and for utilizing LiDAR data to generate a high quality DEM for digital photogrammetry and orthorectification processes. A comparative analysis is also presented to assess the performance of proposed methods. The results demonstrated the feasibility of using LiDAR intensity image-based GCPs and the LiDAR-derived DEM to produce high quality orthoimages. Copyright Springer Numéro de notice : A2007-165 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1007/s10707-006-0005-9 En ligne : https://doi.org/10.1007/s10707-006-0005-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28528 [article]

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Enabling routes of road network constrained movements as mobile service context / A. Brilingaite in Geoinformatica, vol 11 n° 1 (March - May 2007)  

Public [article]  inGeoinformatica > vol 11 n° 1 (March - May 2007) . - pp 55 - 102 Titre : Enabling routes of road network constrained movements as mobile service context Type de document : Article/Communication Auteurs : A. Brilingaite, Auteur ; C.S. Jensen, Auteur Année de publication : 2007 Article en page(s) : pp 55 - 102 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Informatique [Termes IGN] bibliothèque logicielle [Termes IGN] itinéraire [Termes IGN] positionnement par GPS [Termes IGN] prise en compte du contexte [Termes IGN] service fondé sur la position [Termes IGN] stockage de données [Termes IGN] téléphonie mobile Résumé : (Auteur) With the continuing advances in wireless communications, geo-positioning, and portable electronics, an infrastructure is emerging that enables the delivery of on-line, location-enabled services to very large numbers of mobile users. A typical usage situation for mobile services is one characterized by a small screen and no keyboard, and by the service being only a secondary focus of the user. Under such circumstances, it is particularly important to deliver the “right” information and service at the right time, with as little user interaction as possible. This may be achieved by making services context aware. Mobile users frequently follow the same route to a destination as they did during previous trips to the destination, and the route and destination constitute important aspects of the context for a range of services. This paper presents key concepts underlying a software component that identifies and accumulates the routes of a user along with their usage patterns and that makes the routes available to services. The problems associated with of route recording are analyzed, and algorithms that solve the problems are presented. Experiences from using the component on logs of GPS positions acquired from vehicles traveling within a real road network are reported. Copyright Springer Numéro de notice : A2007-166 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1007/s10707-006-0010-z En ligne : https://doi.org/10.1007/s10707-006-0010-z Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28529 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-07011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Assessing the certainty of locations produced by an address geocoding system / C.A. Davis in Geoinformatica, vol 11 n° 1 (March - May 2007)  

Public [article]  inGeoinformatica > vol 11 n° 1 (March - May 2007) . - pp 103 - 129 Titre : Assessing the certainty of locations produced by an address geocoding system Type de document : Article/Communication Auteurs : C.A. Davis, Auteur ; Frederico Fonseca, Auteur Année de publication : 2007 Article en page(s) : pp 103 - 129 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] base de données localisées [Termes IGN] géocodage par adresse postale [Termes IGN] incertitude de position [Termes IGN] système d'information géographique Résumé : (Auteur) Addresses are the most common georeferencing resource people use to communicate to others a location within a city. Urban GIS applications that receive data directly from citizens, or from legacy information systems, need to be able to quickly and efficiently obtain a spatial location from addresses. In this paper we understand addresses in a broader perspective, in which not only the conventional elements of postal addresses are considered, but other kinds of direct or indirect references to places, such as building names, postal codes, or telephone area codes, which are also valuable as locators to urban places. This broader view on addresses allows us to work with two perspectives. First, in the ontological definition, modeling, and implementation of an addressing database that is flexible enough to accommodate the variety of concepts and address formats used worldwide, along with direct and indirect references to places. Second, in the definition of an indicator that is able to quantify the degree of certainty that could be reached when a user-given, semi-structured address is geocoded into a spatial position, as a function of the type and completeness of the available addressing data and of the geocoding method that has been employed. This indicator, which we call Geocoding Certainty Indicator (GCI), can be used as a threshold, beyond which the geocoded event should be left out of any statistical analysis, or as a weight that allows spatial analysis methods to reduce the influence of events that have been less reliably located. In order to support geocoding activities and the determination of the GCI, we propose a conceptual schema for addressing databases. The schema is flexible enough to accommodate a variety of addressing systems, at various levels of detail, and in different countries. Our intention is to depart from the usual geocoding strategy employed in commercial GIS products, which is usually limited to the average American or British address format. The schema also extends the notion of postal address to something broader, including popular names for places, building names, reference places, and other concepts. This approach extends Simpson’s and Yu’s Comput. Environ. Urban Syst., 27: 283–307, 2003 work on postal codes to records of any kind, including place names and loosely formatted addresses. Copyright Springer Numéro de notice : A2007-167 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-006-0015-7 En ligne : https://doi.org/10.1007/s10707-006-0015-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28530 [article]

Exemplaires(1)

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057-07011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Advances in GML for geospatial applications / C.T. Lu in Geoinformatica, vol 11 n° 1 (March - May 2007)  

Public [article]  inGeoinformatica > vol 11 n° 1 (March - May 2007) . - pp 131 - 157 Titre : Advances in GML for geospatial applications Type de document : Article/Communication Auteurs : C.T. Lu, Auteur ; R.F. Dos Santos, Auteur ; L.N. Sripada, Auteur ; Y. Kou, Auteur Année de publication : 2007 Article en page(s) : pp 131 - 157 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] base de données localisées [Termes IGN] diffusion de données [Termes IGN] données localisées [Termes IGN] GML [Termes IGN] traitement de données localisées [Termes IGN] XML Résumé : (Auteur) This paper presents a study of Geography Markup Language (GML), the issues that arise from using GML for spatial applications, including storage, parsing, querying and visualization, as well as the use of GML for mobile devices and web services. GML is a modeling language developed by the Open Geospatial Consortium (OGC) as a medium of uniform geographic data storage and exchange among diverse applications. Many new XML-based languages are being developed as open standards in various areas of application. It would be beneficial to integrate such languages with GML during the developmental stages, taking full advantage of a non-proprietary universal standard. As GML is a relatively new language still in development, data processing techniques need to be refined further in order for GML to become a more efficient medium for geospatial applications. Copyright Springer Numéro de notice : A2007-168 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-006-0013-9 En ligne : https://doi.org/10.1007/s10707-006-0013-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28531 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-07011	RAB	Revue	Centre de documentation	En réserve L003	Disponible