Adequacy of pseudo-direct georeferencing of terrestrial laser scanning data for coastal landscape surveying against indirect georeferencing

Type Article
Date 2017
Language English
Author(s) Jaud MarionORCID1, Letortu Pauline2, Augereau Emmanuel1, Le Dantec Nicolas1, 3, Beauverger Mickael1, Cuq Veronique2, Prunier Christophe1, Le Bivic Rejanne1, Delacourt Christophe1
Affiliation(s) 1 : Univ Bretagne Occidentale, IUEM, UMR 6538, Lab Domaines Ocean, Technopole Brest Iroise,Rue Dumont Durville, F-29280 Plouzane, France.
2 : Univ Bretagne Occidentale, IUEM, UMR 6554, LETG Brest Geomer, Technopole Brest Iroise, Plouzane, France.
3 : DTecEMF, CEREMA Ctr Etudes & Expertise Risques Environm Mo, Plouzane, France.
Source European Journal Of Remote Sensing (Taylor & Francis Ltd), 2017 , Vol. 50 , N. 1 , P. 155-165
DOI 10.1080/22797254.2017.1300047
WOS© Times Cited 11
Keyword(s) Terrestrial laser scanning, coastal monitoring, direct georeferencing, indirect georeferencing, multi-temporal surveys, geomorphological evolution
Abstract

The georeferencing process is crucial to the accuracy of terrestrial laser scanner (TLS) data, in particular in the context of diachronic studies relying on multi-temporal surveys. The use of Ground Control Points in the georeferencing process can however be complex when confronted with the practical constraints of coastal surveying. A simple and quick alternative method called "pseudo-direct georeferencing" is proposed in the present paper. This method involves internal inclinometers to measure roll and pitch angles and a centimetric GPS to measure the position of the TLS center and the position of one backsight target. When assessing the transformational uncertainty by using a set of independent ground validation points for both classical indirect and proposed pseudo-direct methods, we respectively obtain root mean square errors of 4.4 cm for the indirect method and 3.8 cm for the pseudo-direct method.

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Jaud Marion, Letortu Pauline, Augereau Emmanuel, Le Dantec Nicolas, Beauverger Mickael, Cuq Veronique, Prunier Christophe, Le Bivic Rejanne, Delacourt Christophe (2017). Adequacy of pseudo-direct georeferencing of terrestrial laser scanning data for coastal landscape surveying against indirect georeferencing. European Journal Of Remote Sensing, 50(1), 155-165. Publisher's official version : https://doi.org/10.1080/22797254.2017.1300047 , Open Access version : https://archimer.ifremer.fr/doc/00638/75050/