Centre de documentation
scientifique

Dépouillements

Mapping Ontario's highways with Lidar: can Lidar complete with photogrammetric mapping / R. Berg in GIM international, vol 15 n° 11 (November 2001)

Public [article]  inGIM international > vol 15 n° 11 (November 2001) . - pp 12 - 15 Titre : Mapping Ontario's highways with Lidar: can Lidar complete with photogrammetric mapping Type de document : Article/Communication Auteurs : R. Berg, Auteur ; J. Ferguson, Auteur Année de publication : 2001 Article en page(s) : pp 12 - 15 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] cartographie numérique [Termes IGN] densité des points [Termes IGN] données lidar [Termes IGN] modèle numérique de terrain [Termes IGN] Ontario (Canada) [Termes IGN] photogrammétrie numérique [Termes IGN] restitution numérique Résumé : (Auteur) The spectrum of applications for LIDAR (LIght Detection And Ranging) is a broad one and includes, among many, highway design surveys and route planning studies. One of the questions the Ministry of Transportation Ontario (MTO) Canada wanted to get an answer to was whether LIDAR could provide accuracy similar to that of the photogrammetric mapping products normally produced. In the authors' experience, the answer was negative. However, they discuss the fact that LIDAR offers some distinct advantages, such as speed of DTM generation and higher point density under canopy which can, under certain conditions, result in a superior DTM. Numéro de notice : A2001-122 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21822 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
061-01111	RAB	Revue	Centre de documentation	En réserve L003	Disponible

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]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
061-01111	RAB	Revue	Centre de documentation	En réserve L003	Disponible