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The use of low-cost, single-frequency GNSS receivers in mapping surveys / M. Tsakiri in Survey review, vol 50 n° 358 (January 2018)  

Public [article]  inSurvey review > vol 50 n° 358 (January 2018) . - pp 46 - 56 Titre : The use of low-cost, single-frequency GNSS receivers in mapping surveys Type de document : Article/Communication Auteurs : M. Tsakiri, Auteur ; A. Sioulis, Auteur ; George Piniotis, Auteur Année de publication : 2018 Article en page(s) : pp 46 - 56 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] coût [Termes IGN] Grèce [Termes IGN] positionnement cinématique en temps réel [Termes IGN] récepteur GNSS [Termes IGN] récepteur monofréquence [Termes IGN] test de performance Résumé : (auteur) The emergence of low-cost, navigation-type receivers capable to provide carrier-phase data (the so-called high-sensitivity carrier-phase positioning) has been steadily growing over the recent years. The aim of this study was to evaluate the positioning performance of a high-sensitivity receiver in a network real-time kinematic environment for mapping surveying applications. Specifically, using as rover receiver the u-blox NEO-7P module and the low-cost antenna Tallysman TW2410, sets of data were collected for the purpose of mapping surveying. The external accuracy of the obtained solutions is considered using different positioning techniques and the internal indicators of the system during real-time kinematic (RTK) positioning are assessed. The assessment indicates that in benign environments this type of receivers produce results that are comparable to RTK positioning using geodetic receivers and with a significantly lower cost. Numéro de notice : A2018-177 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1080/00396265.2016.1222344 Date de publication en ligne : 16/09/2016 En ligne : https://doi.org/10.1080/00396265.2016.1222344 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89821 [article]

Orthophoto generation from unorganized point clouds / L. Tournas in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 11 (November 2007)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 11 (November 2007) . - pp 1277 - 1283 Titre : Orthophoto generation from unorganized point clouds Type de document : Article/Communication Auteurs : L. Tournas, Auteur ; M. Tsakiri, Auteur Année de publication : 2007 Article en page(s) : pp 1277 - 1283 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] données laser [Termes IGN] données localisées 3D [Termes IGN] lasergrammétrie [Termes IGN] ligne de visée [Termes IGN] orthoimage [Termes IGN] semis de points [Termes IGN] télémétrie laser terrestre [Termes IGN] tessellation [Termes IGN] triangulation de Delaunay Résumé : (Auteur) The reconstruction of realistic precise surfaces is required in many different applications. To date, terrestrial laser scanning offers 3D input data which are suitable for surface generation but are lacking in photo-realistic appearance. Texture for scanned surfaces can be provided by orthophotos generated from photographs that are acquired from almost the same viewpoint as the incident laser beam. However, the creation of an orthophoto using typical photogrammetric procedures requires the representation of the scanned surface with a triangulated mesh which cannot be created automatically in all cases. In this paper, a new method for automatic orthophoto generation from unorganized point clouds is presented. In the proposed methodology, the acquisition of accurate height information is directly derived from the point cloud without the prior requirement of a triangulated mesh. Analysis of experimental data with large height variations demonstrates the success of the algorithm which produces an orthophoto in near real-time. Issues on the performance of the method are also discussed. Copyright ASPRS Numéro de notice : A2007-518 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.11.1277 En ligne : http://dx.doi.org/10.14358/PERS.73.11.1277 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28881 [article]

Road safety analysis / Vassilis Pagounis in GIM international, vol 21 n° 8 (August 2007)

Public [article]  inGIM international > vol 21 n° 8 (August 2007) . - pp 52 - 53 Titre : Road safety analysis Type de document : Article/Communication Auteurs : Vassilis Pagounis, Auteur ; M. Tsakiri, Auteur ; S. Palaskas, Auteur Année de publication : 2007 Article en page(s) : pp 52 - 53 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] accident de la route [Termes IGN] étude préalable [Termes IGN] lasergrammétrie [Termes IGN] réseau routier [Termes IGN] sécurité routière [Termes IGN] télémétrie laser terrestre [Termes IGN] trafic routier [Termes IGN] visibilité Résumé : (Auteur) With the growing interest in (inter)national road safety programs comes a need for documentation of road systems for safety analysis and traffic-accident reconstruction studies. This requires reliable, accurate and timely data, which, as the authors demonstrate, Terrestrial Laser Scanning (TLS) can provide. Copyright Reed Business Information Numéro de notice : A2007-330 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28693 [article]

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