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Auteur Huiqing Wang |
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Rapid mapping method based on free blocks of surveys / Xianwen Yu in Journal of applied geodesy, vol 10 n° 2 (June 2016)
[article]
Titre : Rapid mapping method based on free blocks of surveys Type de document : Article/Communication Auteurs : Xianwen Yu, Auteur ; Huiqing Wang, Auteur ; Jinling Wang, Auteur Année de publication : 2016 Article en page(s) : pp 131 - 138 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] coordonnées GPS
[Termes IGN] matrice de covariance
[Termes IGN] transformation de coordonnées
[Vedettes matières IGN] Traitement de données GNSSRésumé : (auteur) While producing large-scale larger than 1:2000 maps in cities or towns, the obstruction from buildings leads to difficult and heavy tasks of measuring mapping control points. In order to avoid measuring the mapping control points and shorten the time of fieldwork, in this paper, a quick mapping method is proposed. This method adjusts many free blocks of surveys together, and transforms the points from all free blocks of surveys into the same coordinate system. The entire surveying area is divided into many free blocks, and connection points are set on the boundaries between free blocks. An independent coordinate system of every free block is established via completely free station technology, and the coordinates of the connection points, detail points and control points in every free block in the corresponding independent coordinate systems are obtained based on poly-directional open traverses. Error equations are established based on connection points, which are determined together to obtain the transformation parameters. All points are transformed from the independent coordinate systems to a transitional coordinate system via the transformation parameters. Several control points are then measured by GPS in a geodetic coordinate system. All the points can then be transformed from the transitional coordinate system to the geodetic coordinate system. In this paper, the implementation process and mathematical formulas of the new method are presented in detail, and the formula to estimate the precision of surveys is given. An example has demonstrated that the precision of using the new method could meet large-scale mapping needs. Numéro de notice : A2016-560 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2015-0034 En ligne : https://doi.org/10.1515/jag-2015-0034 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81739
in Journal of applied geodesy > vol 10 n° 2 (June 2016) . - pp 131 - 138[article]