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Auteur Jürgen Döllner |
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Scalable multi-platform distribution of spatial 3D contents / Jan Klimke in International journal of 3-D information modeling, vol 3 n° 3 (July- September 2014)
[article]
Titre : Scalable multi-platform distribution of spatial 3D contents Type de document : Article/Communication Auteurs : Jan Klimke, Auteur ; Benjamin Hagedorn, Auteur ; Jürgen Döllner, Auteur Année de publication : 2014 Article en page(s) : pp 35 - 49 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] dalle
[Termes IGN] données localisées 3D
[Termes IGN] mise à l'échelle
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] moteur de réalité virtuelle
[Termes IGN] PlaGe (plateforme de généralisation)
[Termes IGN] rendu réaliste
[Termes IGN] téléphonie mobile
[Termes IGN] visualisation 3DRésumé : (auteur) Virtual 3D city models provide powerful user interfaces for communication of 2D and 3D geoinformation. Providing high quality visualization of massive 3D geoinformation in a scalable, fast, and cost efficient manner is still a challenging task. Especially for mobile and web-based system environments, software and hardware configurations of target systems differ significantly. This makes it hard to provide fast, visually appealing renderings of 3D data throughout a variety of platforms and devices. Current mobile or web-based solutions for 3D visualization usually require raw 3D scene data such as triangle meshes together with textures delivered from server to client, what makes them strongly limited in terms of size and complexity of the models they can handle.
This paper introduces a new approach for provisioning of massive, virtual 3D city models on different platforms namely web browsers, smartphones or tablets, by means of an interactive map assembled from artificial oblique image tiles. The key concept is to synthesize such images of a virtual 3D city model by a 3D rendering service in a preprocessing step. This service encapsulates model handling and 3D rendering techniques for high quality visualization of massive 3D models. By generating image tiles using this service, the 3D rendering process is shifted from the client side, which provides major advantages: (a) The complexity of the 3D city model data is decoupled from data transfer complexity (b) the implementation of client applications is simplified significantly as 3D rendering is encapsulated on server side (c) 3D city models can be easily deployed for and used by a large number of concurrent users, leading to a high degree of scalability of the overall approach. All core 3D rendering techniques are performed on a dedicated 3D rendering server, and thin-client applications can be compactly implemented for various devices and platforms.Numéro de notice : A2014-693 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/IMAGERIE Nature : Article DOI : 10.4018/ij3dim.2014070103 En ligne : https://doi.org/10.4018/ij3dim.2014070103 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75329
in International journal of 3-D information modeling > vol 3 n° 3 (July- September 2014) . - pp 35 - 49[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 138-2014031 RAB Revue Centre de documentation En réserve L003 Disponible Out-of-core GPU-based change detection in massive 3D point clouds / Rico Richter in Transactions in GIS, vol 17 n° 5 (October 2013)
[article]
Titre : Out-of-core GPU-based change detection in massive 3D point clouds Type de document : Article/Communication Auteurs : Rico Richter, Auteur ; Jan Eric Kiprianidis, Auteur ; Jürgen Döllner, Auteur Année de publication : 2013 Article en page(s) : pp 724 - 741 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] attribut
[Termes IGN] détection de changement
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] processeur graphique
[Termes IGN] semis de points
[Termes IGN] structure de données localisées
[Termes IGN] visualisation 3D
[Termes IGN] visualisation simultanéeRésumé : (Auteur) If sites, cities, and landscapes are captured at different points in time using technology such as LiDAR, large collections of 3D point clouds result. Their efficient storage, processing, analysis, and presentation constitute a challenging task because of limited computation, memory, and time resources. In this work, we present an approach to detect changes in massive 3D point clouds based on an out-of-core spatial data structure that is designed to store data acquired at different points in time and to efficiently attribute 3D points with distance information. Based on this data structure, we present and evaluate different processing schemes optimized for performing the calculation on the CPU and GPU. In addition, we present a point-based rendering technique adapted for attributed 3D point clouds, to enable effective out-of-core real-time visualization of the computation results. Our approach enables conclusions to be drawn about temporal changes in large highly accurate 3D geodata sets of a captured area at reasonable preprocessing and rendering times. We evaluate our approach with two data sets from different points in time for the urban area of a city, describe its characteristics, and report on applications. Numéro de notice : A2013-579 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01362.x Date de publication en ligne : 05/12/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01362.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32715
in Transactions in GIS > vol 17 n° 5 (October 2013) . - pp 724 - 741[article]
Titre : Real-time rendering of water surfaces with cartography-oriented design Type de document : Article/Communication Auteurs : Amir Semmo, Auteur ; Jan Eric Kyprianidis, Auteur ; Matthias Trapp, Auteur ; Jürgen Döllner, Auteur Editeur : New York [Etats-Unis] : Association for computing machinery ACM Année de publication : 2013 Conférence : CAe@Expressive 2013, 9th international symposium on Computational Aesthetics in Graphics, Visualization, and Imaging 19/07/2013 21/07/2013 Anaheim Californie - Etats-Unis Proceedings ACM Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] hachure
[Termes IGN] rendu (géovisualisation)
[Termes IGN] surface de l'eau
[Termes IGN] temps réel
[Vedettes matières IGN] GéovisualisationRésumé : (auteur) More than 70% of the Earth's surface is covered by oceans, seas, and lakes, making water surfaces one of the primary elements in geospatial visualization. Traditional approaches in computer graphics simulate and animate water surfaces in the most realistic ways. However, to improve orientation, navigation, and analysis tasks within 3D virtual environments, these surfaces need to be carefully designed to enhance shape perception and land-water distinction. We present an interactive system that renders water surfaces with cartography-oriented design using the conventions of mapmakers. Our approach is based on the observation that hand-drawn maps utilize and align texture features to shorelines with non-linear distance to improve figure-ground perception and express motion. To obtain local orientation and principal curvature directions, first, our system computes distance and feature-aligned distance maps. Given these maps, waterlining, water stippling, contour-hatching, and labeling are applied in real-time with spatial and temporal coherence. The presented methods can be useful for map exploration, landscaping, urban planning, and disaster management, which is demonstrated by various real-world virtual 3D city and landscape models. Numéro de notice : C2013-007 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : 10.1145/2487276.2487277 En ligne : https://doi.org/10.1145/2487276.2487277 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89571 Documents numériques
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Real-time rendering of water surfaces ... - postprintAdobe Acrobat PDF Unified hybrid terrain representation based on local convexifications / M. Bóo in Geoinformatica, vol 11 n° 3 (September - November 2007)
[article]
Titre : Unified hybrid terrain representation based on local convexifications Type de document : Article/Communication Auteurs : M. Bóo, Auteur ; M. Amor, Auteur ; Jürgen Döllner, Auteur Année de publication : 2007 Article en page(s) : pp 331 - 357 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] imprécision géométrique
[Termes IGN] intégration de données
[Termes IGN] maillage par triangles
[Termes IGN] modèle numérique de terrain
[Termes IGN] relation topologique
[Termes IGN] résolution multiple
[Termes IGN] tessellation
[Termes IGN] Triangulated Irregular NetworkRésumé : (Auteur) Hybrid digital terrain models represent an effective framework to combine and integrate terrain data with different topology and resolution. Cartographic digital terrain models typically are constituted by regular grid data and can be refined by adding locally TINs that represent morphologically complex terrain parts. Direct rendering of both data sets to visualize the digital terrain model would generate geometric discontinuities as the meshes are disconnected. In this paper we present a new meshing scheme for hybrid terrain representations. High quality models without discontinuities are generated as the different representations are softly joined through an adaptive tessellation procedure. Due to the complexity of the algorithms involved in the tessellation procedure, we propose a mixed strategy where part of the information is pre-computed and efficiently encoded. This way, for rendering the model, the tessellation information has to be decoded and only additional simple operations have to be performed. Copyright Springer Numéro de notice : A2007-380 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1007/s10707-006-0003-y En ligne : https://doi.org/10.1007/s10707-006-0003-y Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28743
in Geoinformatica > vol 11 n° 3 (September - November 2007) . - pp 331 - 357[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-07031 RAB Revue Centre de documentation En réserve L003 Disponible Geospatial digital rights management in geovisualization / Jürgen Döllner in Cartographic journal (the), vol 42 n° 1 (June 2005)
[article]
Titre : Geospatial digital rights management in geovisualization Type de document : Article/Communication Auteurs : Jürgen Döllner, Auteur Année de publication : 2005 Article en page(s) : pp 27 - 34 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] diffusion de données
[Termes IGN] données localisées 3D
[Termes IGN] gestion des droits numériques
[Termes IGN] information géographique numérique
[Termes IGN] interface utilisateur
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] monde virtuel
[Termes IGN] visualisation 3DRésumé : (Auteur) Geovisualization offers powerful tools, techniques, and strategies to present, explore, analyze, and manage geoinformation. Interactive geovirtual environments such as virtual 3D maps or virtual 3D city models, however, raise the question how to control geodata usage and distribution. We present a concept for embedding digital rights in geovisualizations. It is based on geo-documents, an object-oriented scheme to specify a wide range of geovisualizations. Geo-documents are assembled by building blocks categorized into presentation, structure, interaction, animation, and Digital Rights Management (DRM) classes. DRM objects allow for defining permissions and constraints for all objects contained in geo-documents. In this way, authors of geovisualizations can control how their geo-documents are used personalized, and redistributed by users. The strengths of the presented concept include the ability to integrate heterogeneous 2D and 3D geodata within a compact design scheme and the ability to cope with privacy, security, and copyright issues. Embedded digital rights in geovisualizations can be applied to improve the usability of geodata user interfaces, to implement publisher-subscriber communication systems for geodata, and to establish business model for geodata trading systems. Numéro de notice : A2005-334 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/000870405X57266 En ligne : https://doi.org/10.1179/000870405X57266 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27470
in Cartographic journal (the) > vol 42 n° 1 (June 2005) . - pp 27 - 34[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 030-05011 RAB Revue Centre de documentation En réserve L003 Disponible Constraints as means of controlling usage of geovirtual environments / Jürgen Döllner in Cartography and Geographic Information Science, vol 32 n° 2 (April 2005)PermalinkIntegration of dynamic atmospheric modeling and object-oriented GIS / L. Becker in GIS Geo-Informations-Systeme, vol 13 n° 2 (April 2000)Permalink