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Evaluating the performance of using PPK-GPS technique in producing topographic contour map / Ahmed El Shouny in Marine geodesy, vol 40 n° 4 (July 2017)  

Public [article]  inMarine geodesy > vol 40 n° 4 (July 2017) . - pp 224 - 238 Titre : Evaluating the performance of using PPK-GPS technique in producing topographic contour map Type de document : Article/Communication Auteurs : Ahmed El Shouny, Auteur ; Nagy Yakoub, Auteur ; Magdy Hosny, Auteur Année de publication : 2017 Article en page(s) : pp 224 - 238 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] altitude orthométrique [Termes IGN] analyse comparative [Termes IGN] carte topographique [Termes IGN] courbe de niveau [Termes IGN] données GPS [Termes IGN] Egypte [Termes IGN] GPS en mode différentiel [Termes IGN] Nil (delta du) [Termes IGN] niveau à bulle [Termes IGN] post-traitement [Vedettes matières IGN] Altimétrie Résumé : (Auteur) The Global Positioning System (GPS) is considered as one of the most powerful tools that are used in geodetic works. It is increasingly considered as an alternative tool for conventional surveying techniques. The goal of this research paper is to produce a methodology for generating topographic contour maps using the post-processed kinematic differential GPS technique (PPK-GPS). The performance of this technique is assessed by comparing it with the traditional spirit-leveling technique taking into consideration the accuracy, time, and cost. The study area is located along the Mediterranean coast in the Rosetta area of the middle Delta in Egypt with a total area of about 39 km2. The field work includes 14 control points and about 50,000 PPK observations. In addition, 20 check cross sections that extend along the coastal line from Rosetta to El Burullus cities were observed using both spirit-leveling and GPS-PPK techniques. The results of the comparison indicate that the PPK-GPS technique can be used instead of spirit leveling in producing a topographic contour map with an accuracy of about 20 cm in orthometric height. We find that the PPK-GPS technique reduces the estimated time of leveling works in our study area by about 70%. Numéro de notice : A2017-667 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1080/01490419.2017.1321594 En ligne : https://doi.org/10.1080/01490419.2017.1321594 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=87142 [article]