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

作者：Jaud Marion^*; Letortu Pauline; Augereau Emmanuel; Le Dantec Nicolas; Beauverger Mickael; Cuq Veronique; Prunier Christophe; Le Bivic Rejanne; Delacourt Christophe

来源：European Journal of Remote Sensing, 2017, 50(1): 155-165.

DOI：10.1080/22797254.2017.1300047

• Terrestrial laser scanning
• coastal monitoring
• direct georeferencing
• indirect georeferencing
• multi-temporal surveys
• geomorphological evolution

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.

• 出版日期2017