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Dreidimensionale Gebäuderekonstruktion aus digitalen Oberflächenmodellen und Grundrissen / Claus Brenner (2000)
Titre : Dreidimensionale Gebäuderekonstruktion aus digitalen Oberflächenmodellen und Grundrissen Titre original : [Reconstruction 3D du bâti à partir de modèles numériques de surfaces et d'éléments] Type de document : Thèse/HDR Auteurs : Claus Brenner, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2000 Collection : DGK - C Sous-collection : Dissertationen num. 530 Importance : 124 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9569-4 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] image à haute résolution
[Termes IGN] modèle numérique de surface
[Termes IGN] modèle numérique de sursol
[Termes IGN] modèle numérique de terrain
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] représentation géométrique
[Termes IGN] villeIndex. décimale : 30.60 Géodésie spatiale Résumé : (Auteur) Three-dimensional city models are of growing importance. Concerning the applications, providing models for the computation of electromagnetic wave propagation in the context of cellular phones is still a highly relevant topic. Besides this "classic" application, however, there have grown in the meantime several other fields, for example tourism information systems, three-dimensional navigation systems and visualization for the purpose of city planning and architectural contests, just to name a few.
All those applications are based on a geometric city model, which contains in particular a three-dimensional representation of the buildings, sometimes complemented by a virtual reality (textured) representation of the building's surface. Photogrammetric methods are very well suited to obtain such models. However, it has become clear very early that manual photogrammetric measurement is very labor-intensive. Thus it is not economically feasible to capture city models consisting of many thousands of buildings using this approach.
Consequently, since many years, the partial or total automation of building reconstruction has been a topic of worldwide research. This work is also part of those efforts. In contrast to other approaches, it exhibits the following characteristics:
The reconstruction uses high resolution height models, as obtained by airborne laser scanning. This gives the advantage of an explicit geometric representation, which is used by the employed segmentation methods.
Existing ground plans are incorporated into the reconstruction. On the one hand, this leads to a high lateral accuracy. On the other hand, hints from the ground plan can be used to support the three-dimensional reconstruction process itself.
The application as a fully automatic system as well as the incorporation of the algorithms into an inter--active, semi-automatic reconstruction tool have been investigated.
In summary, using the above mentioned selection of data sources and processing methods, a system was realized which achieves an unprecedented high level of automation. It was tested on several pilot projects, including parts of the cities of Karlsruhe, Heidelberg, Bruchsal, Stuttgart and Vienna.Numéro de notice : 27825 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse étrangère DOI : sans En ligne : https://www.ifp.uni-stuttgart.de/dokumente/Dissertationen/claus_diss.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=56449 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 27825-01 33.60 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible Ein hybrides Meßsystem zur Kalibrierung von Strichteilungen / O. Freide (2000)
Titre : Ein hybrides Meßsystem zur Kalibrierung von Strichteilungen Titre original : [Un système de mesure hybride pour l'étalonnage de division de traits] Type de document : Thèse/HDR Auteurs : O. Freide, Auteur Mention d'édition : 1 Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2000 Collection : DGK - C Sous-collection : Dissertationen num. 521 Importance : 70 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9560-1 Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] chambre DTC
[Termes IGN] détection de contours
[Termes IGN] erreur systématique
[Termes IGN] étalonnage d'instrument
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] filtrage du bruit
[Termes IGN] filtre de Canny
[Termes IGN] filtre de Deriche
[Termes IGN] interféromètre au laser
[Termes IGN] pixel
[Termes IGN] précision millimétriqueIndex. décimale : 35.11 Géométrie et qualité des prises de vues Résumé : (Auteur) This thesis presents a new system for the calibration of scales of random code and length. For this purpose, a laser interferometer and a CCD-array camera are combined to form a hybrid measuring system with an accuracy better than ±5 µm. Laserbeam and longitudinal axis of the scale are arranged colinearly. The camera is positioned perpendicular to this axis and observes a 1 cm2 large window of the scale. As the distance between the two edges of a line of a bar code scale may be wider than the size of the window, they are observed separately one after the other. The center of a line, used by definition for the calibration, can be derived from the two images. Measurement is possible under both static and dynamic conditions. The difference is that, as both gauges are read out simultaneously, the scale stands still or moves in longitudinal direction. For static measurements, the edge positions are approximately adjusted by means of their nominal value, which automatically reduces the number of observations to a minimum. Of course, dynamic measurement is faster, but the technical demands are higher due to the steady read out of both gauges. In order to reduce the amount of data, only those images with at least one visible edge of the bar code are stored. Therefore, after grabbing, each image is immediately scanned for edges by a simple but imprecise method. The precise determination of the distance between the edge and the origin of the image coordinate system is done off-line after the measurement, using their entire width in the radiometrically corrected image. The distance between the edge and the origin of the coordinate system is transformed by a previously determined scale factor into the metric system of the laser. After meteorological correction, the laser value determines the shift relative to the arbitrarily chosen start position yielding the geometric relation between the images. After describing the physical principles and their technical realisation, the errors of both sensors are presented in a systematic manner to give an estimate of the accuracy of the system. Especially for the camera, practical research results concerning lens distortion, system noise, sensor sensitivity, and lighting effects are presented. To extract the edges in an image reliably and with sub-pixel accuracy, different algorithms for edge detection are explained in detail and compared with regard to their performance. This includes the Difference-of-Boxes, Laplacian-of-Gaussian, Difference-of-Gaussians and the shen, canny, deriche filter group. With these algorithms, sub-pixel accuracy can already be achieved by the proposed evaluation stra-tegy in the twodimensional image. Special sub-pixel precise algorithms are only summarized because they merely reduce noise as demonstrated by the “STEGER-Filter”. Finally, the results of the practical application of the measurement system with respect to the calibration of Invar-Barcode staffs are presented. Numéro de notice : 27822 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=56446 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 27822-01 35.11 Livre Centre de documentation En réserve M-103 Disponible Einfluß von Auflasteffekten auf präzise GPS-Messungen / Rolf Dach (2000)
Titre : Einfluß von Auflasteffekten auf präzise GPS-Messungen Titre original : [Influence des effets de surcharge sur les mesures précises par GPS] Type de document : Thèse/HDR Auteurs : Rolf Dach, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2000 Collection : DGK - C Sous-collection : Dissertationen num. 519 Importance : 134 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9558-8 Note générale : Bibliographie 5 PAGES Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] déformation verticale de la croute terrestre
[Termes IGN] données GPS
[Termes IGN] positionnement par GNSS
[Termes IGN] positionnement par GPS
[Termes IGN] surcharge océanique
[Termes IGN] traitement de données GNSSIndex. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Auteur) The Global Positioning System (GPS) has entered many sectors of the Geodesy. The accuracy of the analysis results could be greatly improved by developments of the receiver technology, the analysis modeling techniques as well as by the continuous work of international, scientific services, e.g. the International GPS Service (IGS). This leads to the fact that phenomena, mostly neglected up to now, attain the range of verifiability. An example for this is the vertical, loading deformation of the earth crust induced by the ocean tides, the vertical ocean loading effect. The subject of this thesis is the question, if, and to what degree the results from an analysis meeting the highest requirements of accuracy, existing, e.g., in the field of geodynamics, axe affected by the vertical ocean loading effect. Therefore, the investigations are mainly focused on the height component. Since it is known from experience, that solutions for the vertical component are heavily affected by the influence of the multipath, the selection of the elevation mask, the influence of the antenna phase center variation, and related effects, corresponding investigations are included into the thesis. As a result of this analysis, it can be concluded that it is possible to verify the vertical ocean loading effect in GPS data and to validate corresponding models using GPS measurements. Therefore, an adequate modeling of the ocean loading effect is recommended for the high accuracy GPS analysis. Provided that GPS observations are available over 24 hours and a sufficient number of observations can be included in the solution, the impact of neglected ocean loading effect on station heights and their repeatibilities may be low. On the other hand, the influence on non geometric results can become large if they are correlated with the station height and if they are to be obtained with a high resolution in time. Numéro de notice : 69614 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62244 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 69614-01 30.61 Livre Centre de documentation Géodésie Disponible 69614-02 30.61 Livre Centre de documentation Géodésie Disponible Entwicklung eines Meßsystems zur automatischen Erfassung differentieller Punktverschiebungen im Objektraum / J.J. Prenting (2000)
Titre : Entwicklung eines Meßsystems zur automatischen Erfassung differentieller Punktverschiebungen im Objektraum Titre original : On the development of a measuring system for automatic monitoring of differential object displacement Type de document : Thèse/HDR Auteurs : J.J. Prenting, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2000 Collection : DGK - C Sous-collection : Dissertationen num. 514 Importance : 114 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9552-6 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre
[Termes IGN] alignement
[Termes IGN] chambre DTC
[Termes IGN] déformation d'édifice
[Termes IGN] orientation du capteur
[Termes IGN] photogrammétrie métrologique
[Termes IGN] réfraction
[Termes IGN] surveillance d'ouvrageIndex. décimale : 33.70 Photogrammétrie terrestre Numéro de notice : 53558 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=59504 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 53558-02 33.70 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible 53558-01 33.70 Livre Centre de documentation Photogrammétrie - Lasergrammétrie Disponible Geo-Informationssysteme mit großmaßstäbigem Anwendungsbezug / M. Scheu (2000)
Titre : Geo-Informationssysteme mit großmaßstäbigem Anwendungsbezug Titre original : Large scale oriented Geographic Information Systems Type de document : Thèse/HDR Auteurs : M. Scheu, Auteur Mention d'édition : 1 Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 2000 Collection : DGK - C Sous-collection : Dissertationen num. 522 Importance : 123 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9561-8 Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] Allemagne
[Termes IGN] cadastre étranger
[Termes IGN] grande échelle
[Termes IGN] mise à jour
[Termes IGN] système d'information géographiqueIndex. décimale : 30.42 Gravimétrie Résumé : (Auteur) This work examines issues relating to large scale, cadastre oriented GIS. This technology is widely used in the fields of administration, utility industries and public transportation companies. All over the world digital cadastral maps (DCM) are rapidly moving to multipurpose systems. These maps are now widely used by the utilities and local government for planning, asset mapping, monitoring and documentation purposes. The Utility Industry (UI) represents a group of highly experienced users of GIS-Technology with specific requirements for their digital mapping based on spatial cadastral data. Most utility companies rely on the custodians for the supply of an up to date DCM as reference layers in their GIS.
One of the main tasks in the Management of Spatial Data (SDM) is the harmonisation of existing GIS-Applications and an acceleration of business processes within companies and public administrations. This management allows an increase in the value of spatial data by combining basic data and asset data sources.
Basically, the acquisition of spatial and aspatial data requires a very large effort introducing this kind of GIS. Chapter 3 determines that the aspect of maintenance is underestimated in most GIS-projects. Of central interest is the transfer of incremental update and upgrade data from the custodian to the user and possible solutions for the Associativity Problem.
Basics and special strategies of adjustment techniques in processing spatial data are key issues of chapter 4. Advantages like blunder detection or automation in data processing are presented. Without doubt adjustment strategies are a useful tool for data acquisition and maintenance in GIS. The special task of maintaining associativity between basic and asset data in an UI-GIS is discussed.
The impact of key Mainstream IT technologies, namely databases and computer networks, to GIS are determined in chapter 5. Both of them are serving special techniques for storing and distribution of spatial data. Nowadays database management systems support the handling of spatial data using special data sets. The technology of the World Wide Web provides visualisation and distribution of spatial data across the Internet/Intranet.
This work concludes with the result that geodetic skills are indispensable for an operational GIS. This concerns in particular the acquisition, integration and maintenance of spatial data.Numéro de notice : 27821 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=56445 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 27821-01 30.42 Livre Centre de documentation Géodésie Disponible Geoidbestimmung unter Verwendung verschiedener Dichtehypothesen / M. Kuhn (2000)PermalinkOberflächenrekonstruktion mit Hilfe einer Mehrbild-Shape-from-Shading-Methode / C. Piechullek (2000)PermalinkPräzise Positionierung in regionalen GPS-Referenzstationsnetzen / Lambert Wanninger (2000)PermalinkRegionale und globale Gravitationsfeldanalyse hochauflösender Satellitendaten mittels Mehrgitterverfahren / S. Rudolph (2000)PermalinkReport on the symposium of the IAG subcommission for Europe (EUREF) held in Tromso, 22 - 24 June 2000 & reports of the EUREF Technical Working Group, EUREF publication n° 9 / Joao Agria Torres (2000)PermalinkA semi-analytical approach to gravity field analysis from satellite observations / Nico Sneeuw (2000)PermalinkZur Entwicklung eines GPS-Programmsystems für Lehre und Tests unter besonderer Berücksichtigung der Ambiguity Function Methode / B. Zebhauser (2000)PermalinkAbsolute and relative gravimetry 1990-1992-1995 in the Western Yunnan earthquake prediction experimental area / Wolfgang Torge (1999)PermalinkAnalytical and numerical methods in gravity field modelling of ideal and real masses / Dimitrios Tsoulis (1999)PermalinkAnalytische Störungsrechnung mit ANALYTOS / O. Meyer (1999)Permalink