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Verbesserung des Datenmanagements in inhomogenen rechnernetzen geodätischer Messeinrichtungen auf des Basis von Middleware und Dateisystemen am Beispiel der Fundamentalstation Wettzell / A. Neidhardt (2005)
Titre : Verbesserung des Datenmanagements in inhomogenen rechnernetzen geodätischer Messeinrichtungen auf des Basis von Middleware und Dateisystemen am Beispiel der Fundamentalstation Wettzell Titre original : [Amélioration de la gestion des données dans l'organisation des mesures géodésiques des réseaux informatiques non homogènes sur la base de logiciels intermédiaires et de systèmes de datums, par exemple à la station fondamentale de Wettzell] Type de document : Monographie Auteurs : A. Neidhardt, Auteur Editeur : Francfort sur le Main : Bundesamt für Kartographie und Geodäsie Année de publication : 2005 Collection : Mitteilungen des Bundesamtes für Kartographie und Geodäsie, ISSN 1436-3445 num. 37 Importance : 378 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-89888-915-5 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] CORBA
[Termes IGN] échange de données informatisé
[Termes IGN] jeu de données localisées
[Termes IGN] station GPS
[Termes IGN] station permanente
[Termes IGN] traitement de données GNSS
[Termes IGN] Wettzell
[Termes IGN] XMLIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Auteur) Geodetic observatories for space techniques are the fundament for global reference systems since the beginning of space geodesy. The producing of data by these area-wide distributed, permanent data acquisition sites is therefore a main part. However, the requirements increase. A higher amount of measured data have to be transported to the analysing centres without long lasting down times during a more and more reduced time period. Interferences in these data workflows would cause affects in the continuity of the generated time series.
Because of the fact that the main interest for the geodesists applies to the measured geodetic data the aspect of administration and availability for that geodetic data is being more or less underrated. Properly working information processing facilities are supposed to be simply existent. But meanwhile the historically crown systems reach their self set limits. This fact was the cause for a project study defined at the research and development program 2001 to 2005 by the German Research Group for Satellite Geodesy (Forschungsgruppe Satellitengeodasie (FGS)) with the challenge to analyze the data management basically. This defines the frame of the present work, which is an interdisciplinary approach affecting geodesy as well as computer science. Found ideas are applied to the current situation at the geodetic observatory at Wettzell as an exemplary realization.
A profound analysis showed, that the problems are more basical than they were written at the studies notification. The used transfer mechanisms and flows cause a remarkable amount of unstableness. The incrementally accomplished generalisation of the collected information leaded to a three step method, which addresses the abstraction of problem categories and their technical realization.
A basic element is therefore the creation of a reliable, flexible, transparent and stable transfer mechanism. The developed Extended CORBA File Transfer (ECFT) offers most of the criteria for quality of service, which are not or only partially existent in current solutions. And when they are offered they are restricted by system borders. Concurrency control, state driven processing, error or fault management and a flexible system architecture with hidden technical attributes are only a few elements of the new system. With it geodetic data can be transported as well in local area networks as over world wide existing nets.
At least the next step deals with the data handling itself. The originally wished creation of a consistent meta data set was not really considered as reasonable. External procurements and historically given parts would hardly be integrated with this regulation. The present work keeps the individuality of data and their formats instead and offers a homogeneous transformation possibility by defining a description language based on the Extensible Markup Language (XML). This method for conversions of semi-structured and structured data formats can be seen as unique at the moment, because all other techniques uses the abilities of foreign programming languages to convert the original data into a markup set. With the created constructs in the present work any geodetic data sets can be transformed into any wished format.
The final step of the three phases of abstraction creates a superordinated configuration for the currently existing conditions at the geodetic observatory Wettzell. The classification into manageable administration zones with dedicated competencies and their structured interaction over flexible interface access points with a hierarchically structured data processing workflow combines all of the so far developed ideas to a harmonical unit.
The specific character of the present work is therefore especially given by the strong reference to technical realizations. Main focus always laid on a real implementation of the theories and strategies. So the strict compliance of a software process was selected for the structure of the present work. Because of that the developed parts will also be enhanced partially for specific application sets after the ending of this work, e.g. for the new Satellite Observing System Wettzell (SOS-W).Numéro de notice : 13315 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54963 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13315-01 30.61 Livre Centre de documentation Géodésie Disponible 13315-02 30.61 Livre Centre de documentation Géodésie Disponible Integrating land-cover data with different ontologies: identifying change from inconsistency / A. Comber in International journal of geographical information science IJGIS, vol 18 n° 7 (november 2004)
[article]
Titre : Integrating land-cover data with different ontologies: identifying change from inconsistency Type de document : Article/Communication Auteurs : A. Comber, Auteur ; R. Wadsworth, Auteur ; Peter F. Fisher, Auteur Année de publication : 2004 Article en page(s) : pp 691 - 708 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] analyse comparative
[Termes IGN] carte d'occupation du sol
[Termes IGN] cohérence des données
[Termes IGN] détection de changement
[Termes IGN] intégration de données
[Termes IGN] jeu de données localisées
[Termes IGN] occupation du sol
[Termes IGN] ontologie
[Termes IGN] Royaume-Uni
[Termes IGN] série temporelleRésumé : (Auteur) Spatially coincident land-cover information frequently varies due to technological and political variations. This is especially problematic for timeseries analyses. We present an approach using expert expressions of how the semantics of different datasets relate to integrating temporal time series landcover information where the classification classes have fundamentally changed. We use land-cover mapping in the UK (LCMGB and LCM2000) as example data sets because of the extensive object-based meta-data in the LCM2000. Inconsistencies between the two datasets can arise from random, gross and systematic error and from an actual change in land cover. Locales of possible land-cover change are inferred by comparing characterizations derived from the semantic relations and meta-data. Field visits showed errors of omission to be 21% and errors of commission to be 28%, despite the accuracy limitations of the land-cover information when compared with the field survey component of the Countryside Survey 2000. Numéro de notice : A2004-397 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810410001705316 En ligne : https://doi.org/10.1080/13658810410001705316 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26924
in International journal of geographical information science IJGIS > vol 18 n° 7 (november 2004) . - pp 691 - 708[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-04071 RAB Revue Centre de documentation En réserve L003 Disponible 079-04072 RAB Revue Centre de documentation En réserve L003 Disponible Correction of positional errors and geometric distortions in topographic maps and DEMs using a rigorous SAR simulation technique / H. Liu in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 9 (September 2004)
[article]
Titre : Correction of positional errors and geometric distortions in topographic maps and DEMs using a rigorous SAR simulation technique Type de document : Article/Communication Auteurs : H. Liu, Auteur ; Z. Zhao, Auteur ; K.C. Jezek, Auteur Année de publication : 2004 Article en page(s) : pp 1031 - 1042 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] Antarctique
[Termes IGN] carte topographique
[Termes IGN] correction géométrique
[Termes IGN] erreur de positionnement
[Termes IGN] image Radarsat
[Termes IGN] jeu de données localisées
[Termes IGN] modèle mathématique
[Termes IGN] modèle numérique de surface
[Termes IGN] simulationRésumé : (Auteur) In the history of surveying and mapping, a Iarge volumes of topographic maps and digital elevation models have been created at various scales throughout the world. However, positional errors and geometric distortions may exist in the topographic contour maps and their derived DEMs due to inaccurate ground control and poor navigation techniques in the early years. In this paper, we present a new technique to detect and correct positional errors and geometric distortions in topographic data based on rigorous Synthetic Aperture Radar (SAR) image simulation and mathematical modeling of SAR imaging geometry. Our method has been successfully applied to two USGS topographical data sets in Antarctica. Using Radarsat SAR imagery, positional errors of these two data sets have been reduced from 5 km to 200 m and from 200 m to 50 m, respectively. Numéro de notice : A2004-345 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.70.9.1031 En ligne : http://dx.doi.org/10.14358/PERS.70.9.1031 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26872
in Photogrammetric Engineering & Remote Sensing, PERS > vol 70 n° 9 (September 2004) . - pp 1031 - 1042[article]Assessment of a semantic statistical approach to detecting land covers change using inconsistent data sets / A. Comber in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 8 (August 2004)
[article]
Titre : Assessment of a semantic statistical approach to detecting land covers change using inconsistent data sets Type de document : Article/Communication Auteurs : A. Comber, Auteur ; P. Fischer, Auteur ; R. Wadsworth, Auteur Année de publication : 2004 Article en page(s) : pp 931 - 938 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] analyse diachronique
[Termes IGN] base de données d'occupation du sol
[Termes IGN] classification dirigée
[Termes IGN] détection de changement
[Termes IGN] données de terrain
[Termes IGN] interopérabilité sémantique
[Termes IGN] jeu de données localisées
[Termes IGN] métadonnées géographiques
[Termes IGN] occupation du sol
[Termes IGN] ontologie
[Termes IGN] Royaume-Uni
[Termes IGN] statistique descriptiveRésumé : (Auteur) A semantic, statistical approach to reconciling data with different ontologies is introduced. It was applied to UK land cover datasets from 1990 and 2000 in order to identify land cover change. The approach combined expression of expert opinion about how the semantics of the two datasets relate with spectral homogeneity metadata. A sample of the changes identified was assessed by field validation. Change was identified in 41 percent of the visited parcels, and all of the false positives were found to be due to classification error in either dataset. Thus, the approach reliably identifies inconsistency between two datasets, and the results indicate the suitability of uncertainty formalisms. The inclusion of extensive object-level metadata by the data producers greatly facilitates practical solutions to problems of data interoperability. Numéro de notice : A2004-308 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.70.8.931 En ligne : https://doi.org/10.14358/PERS.70.8.931 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26835
in Photogrammetric Engineering & Remote Sensing, PERS > vol 70 n° 8 (August 2004) . - pp 931 - 938[article]The beginning of a logical semantics framework for the integration of thematic map data / N. Wilson in International journal of geographical information science IJGIS, vol 18 n° 4 (june 2004)
[article]
Titre : The beginning of a logical semantics framework for the integration of thematic map data Type de document : Article/Communication Auteurs : N. Wilson, Auteur Année de publication : 2004 Article en page(s) : pp 389 - 415 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] données multisources
[Termes IGN] intégration de données
[Termes IGN] jeu de données localiséesRésumé : (Auteur) The integration of spatial datasets from different sources is becoming an increasingly important issue. It is very desirable to have a rigorous approach to integration, as an ad hoe approach can easily lead to incorrect inferences. This paper takes a formal approach, giving the beginnings of a logical semantics framework which allows meaning to be defined mathematically for spatial datasets which represent certain types of thematic map data. The basic idea is to interpret the datasets as summarizations of spatial variables, which are in turn interpreted as sets of possible worlds (ways the world could be). This semantics approach can give a formal meaning to pairs (or sets) of such datasets, which can then be used to determine the valid inferences from an integrated dataset. Numéro de notice : A2004-209 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810410001672917 En ligne : https://doi.org/10.1080/13658810410001672917 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26736
in International journal of geographical information science IJGIS > vol 18 n° 4 (june 2004) . - pp 389 - 415[article]Réservation
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