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Accuracy analysis of a wireless indoor positioning system using geodetic methods / Przemysław Wagner in Reports on geodesy and geoinformatics, vol 104 n° 1 (December 2017)  

Public [article]  inReports on geodesy and geoinformatics > vol 104 n° 1 (December 2017) . - pp 1 - 19 Titre : Accuracy analysis of a wireless indoor positioning system using geodetic methods Type de document : Article/Communication Auteurs : Przemysław Wagner, Auteur ; Marek Woźniak, Auteur ; Waldemar Odziemczyk, Auteur ; Dariusz Pakuła, Auteur Année de publication : 2017 Article en page(s) : pp 1 - 19 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie [Termes IGN] lever tachéométrique [Termes IGN] positionnement en intérieur [Termes IGN] précision du positionnement [Termes IGN] tachéomètre électronique [Termes IGN] temps réel Résumé : (Auteur) Ubisense RTLS is one of the Indoor positioning systems using an Ultra Wide Band. AOA and TDOA methods are used as a principle of positioning. The accuracy of positioning depends primarily on the accuracy of determined angles and distance differences. The paper presents the results of accuracy research which includes a theoretical accuracy prediction and a practical test. Theoretical accuracy was calculated for two variants of system components geometry, assuming the parameters declared by the system manufacturer. Total station measurements were taken as a reference during the practical test. The results of the analysis are presented in a graphical form. A sample implementation (MagMaster) developed by Globema is presented in the final part of the paper. Numéro de notice : A2017-793 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/rgg-2017-0011 En ligne : https://doi.org/10.1515/rgg-2017-0011 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89070 [article]

The use of video-tacheometric technology for documenting and analysing geometric features of objects / Marek Woźniak in Reports on geodesy and geoinformatics, vol 99 (December 2015)  

Public [article]  inReports on geodesy and geoinformatics > vol 99 (December 2015) . - pp 28 - 43 Titre : The use of video-tacheometric technology for documenting and analysing geometric features of objects Type de document : Article/Communication Auteurs : Marek Woźniak, Auteur ; Ewa Świerczyńska, Auteur ; Sławomir Jastrzębski, Auteur Année de publication : 2015 Article en page(s) : pp 28 - 43 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie moderne [Termes IGN] acquisition de données [Termes IGN] instrument de topométrie [Termes IGN] orientation interne [Termes IGN] semis de points [Termes IGN] tachéomètre électronique [Termes IGN] vidéotachéomètre Résumé : (auteur) This paper analyzes selected aspects of the use of video-tacheometric technology for inventorying and documenting geometric features of objects. Data was collected with the use of the video-tacheometer Topcon Image Station IS-3 and the professional camera Canon EOS 5D Mark II. During the field work and the development of data the following experiments have been performed: multiple determination of the camera interior orientation parameters and distortion parameters of five lenses with different focal lengths, reflectorless measurements of profiles for the elevation and inventory of decorative surface wall of the building of Warsaw Ballet School. During the research the process of acquiring and integrating video-tacheometric data was analysed as well as the process of combining “point cloud” acquired by using video-tacheometer in the scanning process with independent photographs taken by a digital camera. On the basis of tests performed, utility of the use of video-tacheometric technology in geodetic surveys of geometrical features of buildings has been established. Numéro de notice : A2015--022 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : 10.2478/rgg-2015-0010 En ligne : https://doi.org/10.2478/rgg-2015-0010 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80846 [article]