Jaud M., Delsol S., Urbina-Barreto I., Augereau E., Cordier E., Guilhaumon François, Le Dantec N., Floc'h F., Delacourt C. (2024). Low-tech and low-cost system for high-resolution underwater RTK photogrammetry in coastal shallow waters. Remote Sensing, 16 (1), p. 20 [19 p.].
Titre du document
Low-tech and low-cost system for high-resolution underwater RTK photogrammetry in coastal shallow waters
Année de publication
2024
Auteurs
Jaud M., Delsol S., Urbina-Barreto I., Augereau E., Cordier E., Guilhaumon François, Le Dantec N., Floc'h F., Delacourt C.
Source
Remote Sensing, 2024,
16 (1), p. 20 [19 p.]
Monitoring coastal seabed in very shallow waters (0-5 m) is a challenging methodological issue, even though such data is of major importance to many scientific and technical communities. Over the years, Structure-from-Motion (SfM) photogrammetry has emerged as a flexible and inexpensive method able to provide both a 3D model and high-resolution imagery of the seabed (similar to cm level). In this study, we propose a low-cost (about USD 1500), adaptable, lightweight and easily dismantled system called POSEIDON (for Platform Operating in Shallow-water Environment for Imaging and 3D reconstructiON). This prototype combines a floating support (typically a bodyboard), two imagery sensors (here, GoPro((R)) cameras) and an accurate positioning system using Real Time Kinematic GNSS. Validation of this method was deployed in a macrotidal zone, comparing on the foreshore the point cloud provided by POSEIDON "SfM bathymetry" and by classical terrestrial SfM survey. Mean deviation was 5.2 cm and standard deviation was 4.6 cm. Such high-resolution SfM bathymetric surveys have a great potential for a wide range of applications: micro-bathymetry, hydrodynamics (bottom roughness), benthic habitats, ecological inventories, archaeology, etc.
Plan de classement
Sciences du milieu [021]
;
Limnologie physique / Océanographie physique [032]
;
Télédétection [126]
Description Géographique
FRANCE ; REUNION ; ATLANTIQUE ; OCEAN INDIEN ; BRETAGNE ; IROISE MER
Localisation
Fonds IRD [F B010088954]
Identifiant IRD
fdi:010088954
