CLASSIFICATION AND PREDICTION OF BENTHIC HABITAT FROM SCIENTIFIC ECHOSOUNDER DATA: APPLICATION OF MACHINE LEARNING ALGORITHMS
Baigo HAMUNA
Cenderawasih University, Faculty of Mathematics and Natural Science (Indonesia)
https://orcid.org/0000-0002-0706-2496
Sri PUJIYATI
sripu@apps.ipb.ac.idIPB University (Indonesia)
https://orcid.org/0000-0003-4049-4589
Jonson Lumban GAOL
IPB University (Indonesia)
https://orcid.org/0000-0001-8908-3161
Totok HESTIRIANOTO
IPB University (Indonesia)
https://orcid.org/0000-0002-1636-4525
Abstract
This study aims to map three main benthic habitats (coral, seagrass, and sand) in Kapota Atoll (Wakatobi, Indonesia) using single-beam echosounder (SBES) Simrad EK15. Eight acoustic parameters are used as classification aThis study aims to map three main benthic habitats (coral, seagrass, and sand) in Kapota Atoll (Wakatobi, Indonesia) using a single-beam echosounder (SBES) Simrad EK15. The acoustic data were processed using Sonar5-Pro software. Eight acoustic parameters were used as input for the classification and prediction of benthic habitats, including depth (D), five acoustic parameters of the first echo (BD, BP, AttSv1, DecSv1, and AttDecSv1), and cumulative energy of the second and third echoes (AttDecSv2 and AttDecSv3). The classification and prediction process of benthic habitats uses two machine learning algorithms, Random Forest (RF) and Support Vector Machine (SVM), in XLSTAT Basic+ software. The study results show that 49 combinations of acoustic parameters produce benthic habitat maps that meet the minimum accuracy standards for benthic habitat mapping (≥60%). Using eight acoustic parameters produces a more accurate benthic habitat map than using only two main SBES parameters (DecSv1 and AttDecSv2 parameters or E1 and E2 in the RoxAnn system indicating the roughness and hardness indices). The RF and SVM algorithms produce benthic habitat maps with the highest accuracy of 79.33% and 78.67%, respectively. Each acoustic parameter has a different importance for the classification of benthic habitats, where the order of importance of each acoustic parameter in the overall classification follows the following order: AttDecSv2 > D > DecSv1 > BD > AttDecSv3 > AttSv1 > AttDecSv1 > BP. Overall, using more acoustic parameters can significantly improve the accuracy of benthic habitat mapsinput, including depth (D), five acoustic parameters of the first echo (BD, BP, AttSv1, DecSv1, and AttDecSv1) and cumulative energy of the second and third echoes (AttDecSv2 and AttDecSv3). The classification and prediction process of benthic habitats uses two machine learning algorithms, namely Random Forest (RF) and Support Vector Machine (SVM). The study results show that using eight acoustic parameters produces a more accurate benthic habitat map than using only two main SBES parameters (as in the RoxAnn system: roughness and hardness indices). The RF and SVM algorithms produce benthic habitat maps with the highest accuracy of 79.33% and 78.67%, respectively. Each acoustic parameter has a different importance for the classification of benthic habitats, where five acoustic parameters have the highest importance for the overall classification, namely AttDecSv2, D, DecSv1, BD, and AttDecSv3.
Supporting Agencies
Keywords:
Acoustic parameters, Single-beam echosounder, Mapping Accuracy, Random Forest, Support Vector MachineReferences
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Authors
Baigo HAMUNACenderawasih University, Faculty of Mathematics and Natural Science Indonesia
https://orcid.org/0000-0002-0706-2496
Authors
Sri PUJIYATIsripu@apps.ipb.ac.id
IPB University Indonesia
https://orcid.org/0000-0003-4049-4589
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