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I Dewa Gede Agung Pandawana
Universitas Mahasaraswati Denpasar
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Journal : Geosfera Indonesia

 1 
Application of Simple Refraction Correction Method for Shallow Coastal Bathymetric Mapping Based on UAV-Photogrammetry I GD Yudha Partama; I Gede Gegiranang Wiryadi; I Dewa Gede Agung Pandawana; Agus Sukma Yogiswara
Geosfera Indonesia Vol. 8 No. 3 (2023): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v8i3.43360

Abstract

Shallow coastal bathymetric data has an important role in various applications, especially in maritime and coastal management fields. Various survey techniques to produce such data have been carried out by several researchers, one technique that is cheap, covers the wide area, flexible, and produces high-resolution bathymetric data is UAV-photogrammetry. However, this technique is affected by refraction effects that cause the estimated depth of underwater objects to be shallower than fact, thus reducing the accuracy of the bathymetric model. Therefore, the objective of this study is to present a simple refraction correction method based on the Least-Square method. To test the reliability of the method, the accuracy of the model is compared with two other methods (without correction and using a correction factor = 1.34). In addition, the effectiveness of the method was also tested through its application in various survey conditions. Overall, the proposed method outperforms the two existing methods. It is also very effective in reducing the error value during high tide conditions by up to 70%. The height of the UAV does not significantly affect the accuracy of the correction model, so in this case it is recommended to use an altitude of 100 m for survey efficiency.
Co-Authors Abd. Rahman As-syakur Agus Sukma Yogiswara Anak Agung Ayu Dian Andriyani Bagus Tresna Bramstya Budayasa, I Putu Gede Dewa Ayu Novi Swijayanti Dewa Gede Agung Aditya Putra Dewa Gede Agung Gana Kumara Dewa Gede Agung Gana Kumara Dewa Gede Agung Gana Kumara Dewa Putu Yudhi Ardiana Dwipa , I Made Suryana Dwipa, I Made Suryana I Dewa Made Adi Baskara Joni I GD Yudha Partama I Gede Adi Sudi Anggara I Gede Gegiranang Wiryadi I Gede Iwan Sudipa I Gede Yudha Partama I Made Marthana Yusa I Made Subrata Sandhiyasa I Made Wahyu Wijaya I Nyoman Agus Suarya Putra I Nyoman Jayanegara I Nyoman Widhi Adnyana Ida Ayu Putri Gita Ardiantari Ida Bagus Gede Mertha Sedhana Luh Wahyuningsih M. Sudiana Mahendra Ni Kadek Nonik Rasminingsih Ni Made Dwi Puspitawati Ni Made Intan Maulina Ni Putu Yeni Astiti Nyoman Yudha Astriayu Widyari Partama, I GD Yudha Partama, I GD. Yudha Permana, I Putu Andri Pramawati, I.D.A Tantri Prawitasari, Putu Putri Putra, Bagus Putu Pramana Putri Agung Permata Sari Putu Kepramareni Putu Wirayudi Aditama Radhitya, Made Leo Rizkita Ayu Mutiarani Sasadara, Maria Malida Vernandes Takahiro Osawa Tasuku Tanaka Yasa, I Wayan Adi Putra Yasa, I Wayan Adi Putra