B) zoom on the Sharks fault and AAPK-25 Cancer 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 on the Sharks fault and surroundings; (c) zoom around the Moindou lagoon. lagoon.Remote Sens. 2021, 13,17 of5. Conclusions Utilizing a brand new Caledonian lagoon instance, the outcomes with the study confirmed the limitations of Single-Band Ratio (SBR) algorithms that performed well on shallow and deep locations separately, so long as the appropriate bands have been utilized. Applying this method for rugose previously uncharted lagoons is, on the other hand, impractical since it demands a careful delimitation of every single shallow and deep location to match and apply separate models. Applying SBR GYKI 52466 In stock models across the whole lagoon yielded average outcomes. The simultaneous use of Multiple-Band Ratios (MBR) has partially overcome the SBR algorithm limitations. When calibrated on the entire lagoon, SBR models were clearly outperformed by the MBR model on both shallow and deep locations. But, the MBR model did not attain the most effective performances, obtained with dedicated SBR models, particularly fitted for the targeted depths. Finally, the Iterative Many Band Ratios (IMBR) model addressed all limitations and reduced the typical absolute error by greater than 40 in some configurations. In shallow locations, IMBR outperformed MBR with an average absolute error on the identical order as dedicated SBR models, even though getting calibrated on the entire lagoon. The IMBR model could address the entire depth range on the study location with a single process, which was precise for each shallow details and deep channels. Combined using the IMBR strategy, Sentinel-2 data proved to be a useful supply of data for bathymetry retrieval, supplying for our demands a satisfying ground resolution. This prospective is strengthened by the mission revisit time which increases the probability to access no cost photos of high environmental top quality.Supplementary Supplies: The following are out there on line at https://www.mdpi.com/article/10 .3390/rs13204108/s1, Figure S1: Influence of the selection of threshold pair on the IMBR efficiency (RMSE, MAE, R2 ). White rectangles showing finest regions of thresholds combination. Figure S2: All feasible combinations of SBR model outputs compared with in situ data on ELA. Accuracy metrics are offered 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 read and agreed towards the published version of the manuscript. Funding: This perform was funded by New Caledonia institutions (Government, South Province, North Province) within the PRESENCE (PRESsures on coral Ecosystems of New CalEdonia) scientific project. Information Availability Statement: The information presented within this study are openly offered at [https:// sextant.ifremer.fr, accessed on 15 September 2021]. Acknowledgments: The authors are grateful to JosHerlin an.
