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Virtual globes: state of the art and critical issues / Stephan Nebiker in GIM international, vol 24 n° 7 (July 2010)

Public [article]  inGIM international > vol 24 n° 7 (July 2010) . - 3 p. ; pp 17 - 21 Titre : Virtual globes: state of the art and critical issues Type de document : Article/Communication Auteurs : Stephan Nebiker, Auteur ; S. Bleisch, Auteur ; Eberhard Gülch, Auteur Année de publication : 2010 Article en page(s) : 3 p. ; pp 17 - 21 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] état de l'art [Termes IGN] géomatique web [Termes IGN] globe virtuel Résumé : (Auteur) Virtual Globes (VGs) such as Google Earth or Microsoft Bing Maps 3D have in their few years' existence received enormous attention from both mass media and the geospatial community itself. VGs have raised public awareness of geospatial data and applications like no other technology before them. However, this has also tairthed the question of whether they are just hype or offer substantial and long-term business opportunities for providers of geospatial data, technology and services. The authors look at this within the framework of a EuroSDR project. Numéro de notice : A2010-283 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30477 [article]

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Automated 3D building reconstruction using ALS and digital photogrammetry / S. Nagarajan in GIS development, vol 10 n° 5 (May 2006)

Public [article]  inGIS development > vol 10 n° 5 (May 2006) . - pp 18 - 21 Titre : Automated 3D building reconstruction using ALS and digital photogrammetry Type de document : Article/Communication Auteurs : S. Nagarajan, Auteur ; Eberhard Gülch, Auteur ; Michael Hahn, Auteur Année de publication : 2006 Article en page(s) : pp 18 - 21 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] données lidar [Termes IGN] image aérienne [Termes IGN] modélisation 3D [Termes IGN] reconstruction 3D du bâti Résumé : (Auteur) 3D building models are prominently used in 3D city models. The requirement for 3D city models is increasing over the last few years in many applications like urban planning, noise simulation, disaster management, tourism, defense and security, navigation, telecommunication, architecture and entertainment. Numéro de notice : A2006-008 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81444 [article]

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Accuracy of 3D city models: EuroSDR comparison / Harri Kaartinen (2005)  

Public Titre : Accuracy of 3D city models: EuroSDR comparison Type de document : Article/Communication Auteurs : Harri Kaartinen, Auteur ; Juha Hyyppä, Auteur ; Eberhard Gülch, Auteur ; M. George Vosselman, Auteur ; H. Hyyppä, Auteur ; Leena Matikainen, Auteur ; A.D. Hofmann, Auteur ; U. Mäder, Auteur ; A. Persson, Auteur ; U. Söderman, Auteur ; M. Elmqvist, Auteur ; A. Ruiz, Auteur ; M. Dragoja, Auteur ; David Flamanc , Auteur ; Grégoire Maillet , Auteur ; et al., Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2005 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 36-3/W19 Conférence : ISPRS 2005, Workshop Laser scanning 12/09/2005 14/09/2005 Enschede Pays-Bas OA Proceedings archives Importance : pp 227 - 232 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse comparative [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] précision des données Résumé : (auteur) The paper focuses on comparing accuracies obtained with photogrammetry and laser scanning in building extraction and partly compares results obtained with various methods. The objective of the EuroSDR Building Extraction comparison was to evaluate the quality, accuracy, feasibility and economical aspects of semi-automatic building extraction based on photogrammetric techniques with the emphasis on commercial and/or operative systems, semi-automatic and automatic building extraction techniques based on high density laser scanner data and semi-automatic and automatic building extraction techniques based on integration of laser scanner data and aerial images (hybrid technique). The project consists of three test sites by Finnish Geodetic Institute (FGI), namely Senaatti, Hermanni and Espoonlahti and one test site by Institut Geographique National (IGN), namely Amiens. For each test site following data was provided to the partners: aerial images, camera calibration and image orientation information, ground control point coordinates and jpg images of point locations (not for Amiens), laser scanner data and cadastral map vectors of selected buildings. Participants were requested to create the vectors of 3D city models. 3D-models were obtained from 11 participants. Paper confirms with experiments that laser scanning is more suitable in deriving building heights, extracting planar roof faces and ridges of the roof whereas the photogrammetry and aerial images are more suitable in building outline and length determination. CyberCity, Stuttgart and TerraScan (performed by ICC) solutions provided the highest accuracy. There seemed to be a higher variation in the quality of other models depending on test site or remotely sensed information. Numéro de notice : C2005-050 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE/INFORMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/3-W19/papers/227.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103460

EuroSDR building extraction comparaison / Harri Kaartinen (2005)  

Public Titre : EuroSDR building extraction comparaison Type de document : Article/Communication Auteurs : Harri Kaartinen, Auteur ; Juha Hyyppä, Auteur ; Eberhard Gülch, Auteur ; H. Hyyppä, Auteur ; Leena Matikainen, Auteur ; M. George Vosselman, Auteur ; A.D. Hofmann, Auteur ; U. Mäder, Auteur ; A. Persson, Auteur ; U. Söderman, Auteur ; M. Elmqvist, Auteur ; A. Ruiz, Auteur ; M. Dragoja, Auteur ; David Flamanc , Auteur ; Grégoire Maillet , Auteur ; et al., Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2005 Collection : International Archives of Photogrammetry and Remote Sensing, ISSN 0252-8231 num. 36-1/W3 Conférence : ISPRS 2005, WG I/5, IV/3, I/1, I/3, IV/2 ISPRS Hannover Workshop 2005 High-Resolution Earth Imaging for Geospatial Information 17/05/2005 20/05/2005 Hannovre Allemagne OA ISPRS Archives Importance : 6 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] analyse comparative [Termes IGN] arc [Termes IGN] bâtiment [Termes IGN] détection du bâti [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] étalonnage de chambre métrique [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] orientation d'image [Termes IGN] orthoimage [Termes IGN] point d'appui [Termes IGN] semis de points Résumé : (auteur) The paper focuses on comparing accuracies obtained with photogrammetry and laser scanning in building extraction. The objective of the EuroSDR Building Extraction comparison was to evaluate the quality, accuracy, feasibility and economical aspects of semi automatic building extraction based on photogrammetric techniques with the emphasis on commercial and/or operative systems, semi-automatic and automatic building extraction techniques based on high density laser scanner data and semi-automatic and automatic building extraction techniques based on integration of laser scanner data and aerial images. The project consists of three test sites by the Finnish Geodetic Institute (FGI), namely Senaatti, Hermanni and Espoonlahti, and one test site by the Institut Geographique National (IGN), namely Amiens. For each test site following data was provided to the partners: aerial images, camera calibration and image orientation information, ground control point coordinates and jpg images of point locations (not for Amiens), laser scanner data and cadastral map vectors of selected buildings. Participants were requested to create vectors of 3D city models. 3D-models were obtained from 11 participants. The paper confirms with experiments that laser scanning is superior in deriving building heights, extracting planar roof faces and ridges of the roof, whereas photogrammetry and aerial images are superior in building outline and length determination. Numéro de notice : C2005-037 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE/INFORMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/1-W3/PDF/064-kaartinen.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=100078

Semi-automatic building extraction: a system on set of predefined building primitives / Eberhard Gülch in GIM international, vol 15 n° 11 (November 2001)

Public [article]  inGIM international > vol 15 n° 11 (November 2001) . - pp 34 - 37 Titre : Semi-automatic building extraction: a system on set of predefined building primitives Type de document : Article/Communication Auteurs : Eberhard Gülch, Auteur ; H. Müller, Auteur Année de publication : 2001 Article en page(s) : pp 34 - 37 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] détection du bâti [Termes IGN] extraction du sursol [Termes IGN] extraction semi-automatique [Termes IGN] image numérique [Termes IGN] modèle numérique de terrain [Termes IGN] photogrammétrie numérique [Termes IGN] primitive géométrique [Termes IGN] visualisation 3D Résumé : (Auteur) The automation of feature extraction from digital imagery is the most challenging task facing those working today in photogrammetry research and development. Unsolved so far is the fully automatic and reliable detection and reconstruction of objects. There are solutions available for the automation of specific tasks under certain restrictions, but all methods show deficiencies when faced with poor image quality. Occlusions and shadows are factors which frequently prevent high success rates. One current practice involves a semiautomatic approach, a human operator being employed for the extremely difficult interpretation tasks. The authors present an overview of inJECT, a semiautomatic building extraction system. This system, developed by INPHO in cooperation with the Institute of Photogrammetry at the University of Bonn, offers a set of building primitives covering the most common basic house shapes. Automated modules assist the human operator in the measuring phase. The system does not require stereo viewing and operators need only a short course of training. Numéro de notice : A2001-123 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21823 [article]

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OEEPE survey on 3D-city models / C. Fuchs (1998)

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Erzeugung digitaler Geländemodelle durch automatische Bildzuordnung / Eberhard Gülch (1994)  

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