@article{fdi:010088954, title = {{L}ow-tech and low-cost system for high-resolution underwater {RTK} photogrammetry in coastal shallow waters}, author = {{J}aud, {M}. and {D}elsol, {S}. and {U}rbina-{B}arreto, {I}. and {A}ugereau, {E}. and {C}ordier, {E}. and {G}uilhaumon, {F}ran{\c{c}}ois and {L}e {D}antec, {N}. and {F}loc'h, {F}. and {D}elacourt, {C}.}, editor = {}, language = {{ENG}}, abstract = {{M}onitoring 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. {O}ver the years, {S}tructure-from-{M}otion ({S}f{M}) photogrammetry has emerged as a flexible and inexpensive method able to provide both a 3{D} model and high-resolution imagery of the seabed (similar to cm level). {I}n this study, we propose a low-cost (about {USD} 1500), adaptable, lightweight and easily dismantled system called {POSEIDON} (for {P}latform {O}perating in {S}hallow-water {E}nvironment for {I}maging and 3{D} reconstructi{ON}). {T}his prototype combines a floating support (typically a bodyboard), two imagery sensors (here, {G}o{P}ro(({R})) cameras) and an accurate positioning system using {R}eal {T}ime {K}inematic {GNSS}. {V}alidation of this method was deployed in a macrotidal zone, comparing on the foreshore the point cloud provided by {POSEIDON} "{S}f{M} bathymetry" and by classical terrestrial {S}f{M} survey. {M}ean deviation was 5.2 cm and standard deviation was 4.6 cm. {S}uch high-resolution {S}f{M} bathymetric surveys have a great potential for a wide range of applications: micro-bathymetry, hydrodynamics (bottom roughness), benthic habitats, ecological inventories, archaeology, etc.}, keywords = {{RTK}-based {S}f{M} reconstruction ; optical bathymetry ; {G}o{P}ro photogrammetry ; coral reefs ; {FRANCE} ; {REUNION} ; {ATLANTIQUE} ; {OCEAN} {INDIEN} ; {BRETAGNE} ; {IROISE} {MER}}, booktitle = {}, journal = {{R}emote {S}ensing}, volume = {16}, numero = {1}, pages = {20 [19 p.]}, year = {2024}, DOI = {10.3390/rs16010020}, URL = {https://www.documentation.ird.fr/hor/fdi:010088954}, }