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Embedding user-generated content into oblique airborne photogrammetry-based 3D city model / Jianming Liang in International journal of geographical information science IJGIS, vol 31 n° 1-2 (January - February 2017)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 31 n° 1-2 (January - February 2017) . - pp 1 - 16 Titre : Embedding user-generated content into oblique airborne photogrammetry-based 3D city model Type de document : Article/Communication Auteurs : Jianming Liang, Auteur ; Shen Shen, Auteur ; Jianhua Gong, Auteur Année de publication : 2017 Article en page(s) : pp 1 - 16 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] données localisées des bénévoles [Termes IGN] image 3D [Termes IGN] image aérienne oblique [Termes IGN] intégration de données [Termes IGN] interpolation spatiale Résumé : (auteur) Oblique airborne photogrammetry-based three-dimensional (3D) city model (OAP3D) provides a spatially continuous representation of urban landscapes that encompasses buildings, road networks, trees, bushes, water bodies, and topographic features. OAP3D is usually present in the form of a group of unclassified triangular meshes under a multi-resolution data structure. Modifying such a non-separable landscape constitutes a daunting task because manual mesh editing is normally required. In this paper, we present a systematic approach for easily embedding user-generated content into OAP3D. We reduce the complexity of OAP3D modification from a 3D mesh operation to a two-dimensional (2D) raster operation through the following workflow: (1) A region of interest (ROI) is selected to cover the area that is intended to be modified for accommodating user-defined content. (2) Spatial interpolation using a set of manually controlled elevation samples is employed to generate a user-defined digital surface model (DSM), which is used to reform the ROI surface. (3) User-generated objects, for example, artistically painted road textures, procedurally generated water effects, and manually created 3D building models, are overlaid onto the reformed ROI. Numéro de notice : A2017-027 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2016.1180389 En ligne : http://dx.doi.org/10.1080/13658816.2016.1180389 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84017 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-2017011	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-2017012	RAB	Revue	Centre de documentation	En réserve L003	Disponible

3-D dynamic simulation and visualization of landslide models : a case study of the Shum wan road landslide in Hong Kong / Jianhua Gong (2001)  

Public contenu dans Mapping the 21st century: the 20th International Cartographic Conference, ICC 2001, Beijing, China, August 6 - 10, 2001, vol 4. Proceedings / L. Li (2001)   Titre : 3-D dynamic simulation and visualization of landslide models : a case study of the Shum wan road landslide in Hong Kong Type de document : Article/Communication Auteurs : Jianhua Gong, Auteur ; H. Lin, Auteur ; L. Xianhua, Auteur Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 2001 Conférence : ICC 2001, 20th International Cartographic Conference ICA, Mapping the 21th century 06/08/2001 10/08/2001 Pékin Chine OA Proceedings Importance : pp 2618 - 2626 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] Hong-Kong [Termes IGN] modélisation 3D [Termes IGN] paysage [Termes IGN] simulation 3D [Termes IGN] visualisation 3D Résumé : (Auteur) This paper builds a group of landside-related models including the model of geometric and physical parameters of landslide, sliding direction and stability coefficient model, specific stability coefficient model based on dynamic geographical environments, and dynamic process model of landslide. The dynamic relationship between landslide's stability coefficient and landslide band soil's water content, and internal cohesive force under varied space-time distribution are studied. A Iandsilde simulation and visualization system is designed and developed for model computation and visualization of landslide process. The system and landslide- related models are used for studying the Shum Wan Road landslide in Hong Kong. Numéro de notice : C2001-050 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://icaci.org/files/documents/ICC_proceedings/ICC2001/icc2001/file/f16028.pd [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64957