B) zoom around the Sharks fault and surroundings; (c) zoom on
B) zoom on the Sharks fault and surroundings; (c) zoom on the Moindou (a) zoom around the Poya lagoon; (b) zoom around the Sharks fault and surroundings; (c) zoom around the Moindou lagoon. lagoon.Remote Sens. 2021, 13,17 of5. Conclusions Utilizing a new Caledonian lagoon instance, the outcomes in the study FM4-64 Formula confirmed the limitations of Single-Band Ratio (SBR) algorithms that performed effectively on shallow and deep regions separately, as long as the appropriate bands had been employed. Applying this approach for rugose previously uncharted lagoons is, nevertheless, impractical because it requires a careful delimitation of every shallow and deep location to fit and apply separate models. Applying SBR models across the entire lagoon yielded typical outcomes. The simultaneous use of Multiple-Band Ratios (MBR) has partially overcome the SBR algorithm limitations. When calibrated on the whole lagoon, SBR models have been Compound 48/80 Cancer clearly outperformed by the MBR model on both shallow and deep regions. But, the MBR model did not attain the top performances, obtained with devoted SBR models, specifically fitted for the targeted depths. Lastly, the Iterative Many Band Ratios (IMBR) model addressed all limitations and decreased the average absolute error by more than 40 in some configurations. In shallow areas, IMBR outperformed MBR with an typical absolute error of your same order as devoted SBR models, while becoming calibrated on the entire lagoon. The IMBR model could address the whole depth range in the study area having a single process, which was precise for each shallow facts and deep channels. Combined together with the IMBR process, Sentinel-2 data proved to be a helpful supply of information and facts for bathymetry retrieval, offering for our demands a satisfying ground resolution. This potential is strengthened by the mission revisit time which increases the probability to access absolutely free images of higher environmental excellent.Supplementary Materials: The following are obtainable online at https://www.mdpi.com/article/10 .3390/rs13204108/s1, Figure S1: Influence with the selection of threshold pair around the IMBR efficiency (RMSE, MAE, R2 ). White rectangles displaying greatest locations of thresholds combination. Figure S2: All possible combinations of SBR model outputs compared with in situ information on ELA. Accuracy metrics are provided above each and every validation plot. Author Contributions: Conceptualization, S.A. (S im Amrari), R.L.G., B.S. and H.L.; methodology, S.A. (S im Amrari), R.L.G., B.S.; computer software, S.A. (S im Amrari), E.B.; validation, S.A. (S im Amrari), E.B., R.L.G.; formal evaluation, S.A. (S im Amrari); investigation, S.A. (S im Amrari), R.L.G., B.S. and H.L.; sources, S.A. (S im Amrari); data curation, S.A. (S im Amrari) and E.B.; writing–original draft preparation, S.A. (S im Amrari), R.L.G., S.A. (Serge Andr ou ); writing–review and editing, B.S., E.B., R.L.G., S.A. (S im Amrari) and S.A. (Serge Andr ou ); visualization, S.A. (S im Amrari), E.B. and R.L.G.; supervision, R.L.G., B.S. and H.L.; project administration, B.S.; funding acquisition, R.L.G., B.S. and H.L. All authors have study and agreed to the published version of your manuscript. Funding: This operate was funded by New Caledonia institutions (Government, South Province, North Province) inside the PRESENCE (PRESsures on coral Ecosystems of New CalEdonia) scientific project. Information Availability Statement: The information presented within this study are openly out there at [https:// sextant.ifremer.fr, accessed on 15 September 2021]. Acknowledgments: The authors are grateful to JosHerlin an.