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Auteur Ralf Bill |
Documents disponibles écrits par cet auteur (5)
Ajouter le résultat dans votre panier Affiner la recherche Interroger des sources externesEvaluation and monitoring of service quality: discussing ways to meet INSPIRE requirements / Christian Selp in Transactions in GIS, vol 20 n° 2 (April 2016)
Titre : Evaluation and monitoring of service quality: discussing ways to meet INSPIRE requirements Type de document : Article/Communication Auteurs : Christian Selp, Auteur ; Ralf Bill, Auteur Année de publication : 2016 Article en page(s) : pp 163 – 181 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] Allemagne
[Termes IGN] architecture orientée services
[Termes IGN] infrastructure européenne de données localisées
[Termes IGN] INSPIRERésumé : (auteur) Service oriented architectures (SOA) are widely used nowadays. As the name implies such architectures rely on services. Germany developed a marine-specific service oriented data infrastructure (MDI-DE – Marine Dateninfrastruktur Deutschland) from 2010 to 2013. The services in MDI-DE can contribute to fulfilling reporting commitments for various European and national legislation. The services of MDI-DE (just like other services affected, for instance, by INSPIRE) have to meet specific requirements regarding performance, availability and conformity (quality of service, QoS). Although SOA is an important field in scientific research there are very few publications and studies available on QoS, especially regarding INSPIRE requirements. The services of MDI-DE were analyzed using various existing tools. Their usefulness to reflect where either the aspect's performance, availability or conformity needs improvement was partly verified. Due to varying results and the neglect of some services for various reasons it can be stated that the more tools are used, the more conclusive the outcome. Furthermore, service quality was not coherent when measured with different tools. This means that measuring QoS in terms of INSPIRE will be very difficult to do in the future and there is the danger that people will choose the tools with which their services perform best. Numéro de notice : A2016-448 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12145 En ligne : http://dx.doi.org/10.1111/tgis.12145 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81357
in Transactions in GIS > vol 20 n° 2 (April 2016) . - pp 163 – 181[article]
Titre : Automatische Interpretation von Semantik aus digitalen Karten im World Wide Web Type de document : Thèse/HDR Auteurs : Fen Luo, Auteur ; Dieter Fritsch, Directeur de thèse ; Ralf Bill, Directeur de thèse Editeur : Stuttgart : Institüt für Photogrammetrie der Universität Stuttgart Année de publication : 2014 Note générale : bibliographie
Von der Fakultät Luft- und Raumfahrttechnik und Geodäsie der Universität Stuttgart zur Erlangung der Würde eines Doktors der Ingenieurwissenschaften (Dr.-Ing.) genehmigte AbhandlungLangues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] carte de Kohonen
[Termes IGN] données maillées
[Termes IGN] données vectorielles
[Termes IGN] échelle cartographique
[Termes IGN] exploration de données géographiques
[Termes IGN] objet géographique
[Termes IGN] réseau neuronal artificiel
[Termes IGN] toile d'araignée mondialeRésumé : (auteur) On the Internet there are innumerable spatial data representing different sections of the world in form of raster and vector maps. The information contained in these maps is not automatically discoverable, since it is encoded by means of certain map elements. Its semantics is not explicit unless interpreted by an observer. However, the map information can be interpreted by not only humans but also ma-chines. This already requires the large amount of data to be interpreted. We are going to summarize the automatic derivation of semantics from the maps in terms of automatic map interpretation. It involves a process of making the implicit information of a map inventory explicit. For this purpose we present the map interpretation as solutions.
The map interpretation of the current study is done with vector maps what can be found on the internet. For the targeted search of vector maps of the internet, a web crawler is specially developed. The web crawler is a search engine that specifically looks for vector maps. For this, exclusively the shapefile format is sought, which has become a standard format in the GIS environment and in which the vector maps are usually stored. In order to find shapefiles as many as possible, the search is carried out on servers where the probability of finding shapefiles is high. These servers were previously found through the keyword “shapefile download” by Google search.
The maps interpretation includes methods of interpretation of the map objects, of the map types, and of the map scale. First, we will introduce the method of interpreting the map objects. Our aim is to automatically detect the objects based on their specific characteristics. The object recognition is based on self-organizing map (SOM) that is borrowed from artificial intelligence. The map objects are clas-sified into, for example, building floor plan and road network. Its own characteristics should be found for each class and brought in one of the accessible forms of SOM, in this case, a parameter vector. The parameter vectors form the input patterns that are learned in the training phase of SOM. After the input patterns of all object classes of SOM have been learned, the parameter vector is evaluated for each of the present objects on the map and given to the SOM. By the previously successful learning of the input pattern, the objects can be assigned based on each of their calculated parameter vectors of the corresponding object class.
The interpretation of map type is presented as another method. Maps are categorized into different types according to their substantive content and purpose, such as river maps, road maps, contour maps, etc. As for the interpretation of objects, SOM is used here. Hence the input patterns will also be learned which represent the geometric characteristics of the map types. The characteristics arise from both the structure of individual objects and the topology between objects on a map. Now, with a given map in the SOM, the SOM recognizes the appropriate map type according to the learned input pattern. In addition, one obtains the filenames of the maps as well as the content of the website where the map was found. In the present thesis we also investigated how this additional information can help in the interpretation of map type.
The automatic interpretation of the map scale is a further method in addition to the interpretation of the map objects and map types, which is discussed in the present thesis. The interpretation of the map scale is implemented in two ways: the multi-representation and the details grade. In the former case, the scale of the relevant representation can be derived, where an identical object in different realistic representations on the map is shown; while in the latter case, the scale is derived from the details grade, on the basis of the fact that maps with different scales are displayed on different levels of details.Numéro de notice : 17347 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Thèse étrangère DOI : sans En ligne : http://doi.org/10.18419/opus-3960 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83706
Titre : Multimedia-GIS concepts and applications Type de document : Article/Communication Auteurs : Ralf Bill, Auteur Année de publication : 1998 Article en page(s) : pp 21 - 24 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] Allemagne
[Termes IGN] logiciel SIG
[Termes IGN] multimedia
[Termes IGN] système d'information géographiqueRésumé : (Auteur) The term multimedia is on everybody's lips. In context of GIS, multimedia may be seen as a concept including the technical as well as the application oriented dimension of media integration. The use of different media - from text to sound, maps to video supporting decision making, learning, presentation, communication and so on - has considerable potential applications for multimedia geographic information. This paper identifies the requirements for multimedia-GIS with respect to hardware, software and functionality and investigates applications related to spatial information systems. Numéro de notice : A1998-132 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26099
in GIS Geo-Informations-Systeme > vol 11 n° 2 (April 1998) . - pp 21 - 24[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 058-98021 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Eine Strategie zur Ausgleichung und Analyse von Verdichtungsnetzen Titre original : [Une stratégie pour la compensation et l'analyse de réseaux compensés] Type de document : Thèse/HDR Auteurs : Ralf Bill, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1984 Collection : DGK - C Sous-collection : Dissertationen num. 295 Importance : 91 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9345-4 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] Bade-Wurtemberg (Allemagne)
[Termes IGN] compensation de coordonnées
[Termes IGN] modèle mathématique
[Termes IGN] réseau géodésique localIndex. décimale : 30.10 Systèmes de référence et réseaux géodésiques Numéro de notice : 54927 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=59723 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 54927-01 30.10 Livre Centre de documentation Géodésie Disponible
