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A photogrammetric surveying method for field applications / D. Rieke-Zapp in Photogrammetric record, vol 24 n° 125 (March - May 2009)  

Public [article]  inPhotogrammetric record > vol 24 n° 125 (March - May 2009) . - pp 5 - 22 Titre : A photogrammetric surveying method for field applications Type de document : Article/Communication Auteurs : D. Rieke-Zapp, Auteur ; R. Rosenbauer, Auteur ; F. Schlunegger, Auteur Année de publication : 2009 Article en page(s) : pp 5 - 22 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] acquisition d'images [Termes IGN] erreur de mesure [Termes IGN] précision du positionnement [Termes IGN] restitution [Termes IGN] rocher [Termes IGN] tachéomètre électronique Résumé : (Auteur) A photogrammetric method is presented for mapping rock outcrops and other objects in the field. Special attention was paid to simplifying the workflow and to minimising extra bulk and weight of the required equipment while maximising the accuracy of the survey. The minimum equipment needed for the surveys added less than 0·5 kg to the backpack of a field scientist, or as little as 0·2 kg assuming that a suitable camera was already part of the typical equipment carried in the field. Data acquisition in the field took less than 15 min, while image orientation and preparation for stereoviewing took less than 30 min even for a user with little training. Best results were accomplished taking two convergent images as well as three images parallel to the object of interest. Two test sites were surveyed with the method, covering volumes of 3·5 * 5 * 3 m3 and 18 * 20 * 5 m3, to identify the most accurate adjustment method. The maximum length measurement error (LME) was calculated for 28 and 78 distances in the smaller and larger volume, respectively, based on a comparison of the photogrammetric survey with an independent total station survey of the same signalised points. The maximum LME ranged between 0·005 and 0·002 m for the first test site where three cameras were tested, and was 0·021 m for the larger test site where only one camera was tested. The rmse values of the LMEs ranged between 0·003 and 0·001 m for the first and 0·010 m for the second test site, respectively. The smallest and lightest camera, a Ricoh GR Digital, yielded the most accurate results in object space when interior orientation was calibrated on the job. The Sigma SD14 did not require on-the-job calibration for accurate results and was the camera with the best geometric stability. The third camera evaluated, a Rollei d7 metric5, also yielded good results, but could not deliver the extra value that would be expected from a metric camera designed for photogrammetric surveys. Copyright RS&PS + Blackwell Publishing Numéro de notice : A2009-100 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2008.00515.x En ligne : https://doi.org/10.1111/j.1477-9730.2008.00515.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29730 [article]

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3D information extraction from laser point clouds covering complex road junctions / Sander J. Oude Elberink in Photogrammetric record, vol 24 n° 125 (March - May 2009)  

Public [article]  inPhotogrammetric record > vol 24 n° 125 (March - May 2009) . - pp 23 - 36 Titre : 3D information extraction from laser point clouds covering complex road junctions Type de document : Article/Communication Auteurs : Sander J. Oude Elberink, Auteur ; M. George Vosselman, Auteur Année de publication : 2009 Article en page(s) : pp 23 - 36 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] carrefour [Termes IGN] carte topographique [Termes IGN] données laser [Termes IGN] données localisées 3D [Termes IGN] fusion de données [Termes IGN] modélisation 3D [Termes IGN] objet géographique complexe [Termes IGN] reconstruction 3D [Termes IGN] réseau routier [Termes IGN] segmentation d'image [Termes IGN] semis de points Résumé : (Auteur) An automated method for 3D modelling of complex highway interchanges is presented. Laser data and 2D topographic map data have been combined in an innovative 3D reconstruction procedure. Complex situations as shown in this paper demand knowledge to guide the automatic reconstruction. This knowledge has been used in the fusion procedure to constrain the topological and geometrical properties of the reconstructed 3D model. These additions are needed to take care of the lack of data in occluded areas. Laser data has been segmented and filtered before it is fused with map data. In the surface-growing algorithm combining map and laser points, the laser data is assigned to the corresponding road element. Although results are shown using two specific data sources, the algorithm is designed to be capable of dealing with any polygon-based topographic map and any aerial laser scanner data-set. Copyright RS&PS + Blackwell Publishing Numéro de notice : A2009-101 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2008.00516.x En ligne : https://doi.org/10.1111/j.1477-9730.2008.00516.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29731 [article]

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21st international congress of photogrammetry and remote sensing [compte rendu , PEKIN, 3 - 11 Juillet 2008] / P. Newby in Photogrammetric record, vol 24 n° 125 (March - May 2009)  

Public [article]  inPhotogrammetric record > vol 24 n° 125 (March - May 2009) . - pp 66 - 102 Titre : 21st international congress of photogrammetry and remote sensing [compte rendu , PEKIN, 3 - 11 Juillet 2008] Type de document : Article/Communication Auteurs : P. Newby, Auteur ; Paul Aplin, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 66 - 102 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection [Termes IGN] acquisition d'images [Termes IGN] capteur (télédétection) [Termes IGN] instrument de photogrammétrie [Termes IGN] photogrammétrie numérique [Termes IGN] télédétection [Termes IGN] traitement d'image Résumé : (Auteur) The 21st International Congress of Photogrammetry and Remote Sensing was held at the Beijing International Convention Centre, China, from 3rd to 11th July 2008. Reports are given on the Congress as a whole, including the General Assembly, some Technical Commission activities and the Congress Exhibition. Papers from the Congress are published in Volume XXXVII of the International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Copyright RS&PS + Blackwell Publishing Numéro de notice : A2009-102 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2009.00526.x En ligne : https://doi.org/10.1111/j.1477-9730.2009.00526.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29732 [article]

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