2026-10-06T16:51:22Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33971680 2026-09-23T08:01:36Z category_25915 category_25813 item_type_3 month_year_09_2026

<b>Topo-bathymetric datasets of the Bonggil-ri coast, Gyeongju, Korea, from UAV, single-beam and multibeam echosounder surveys</b> Donghyeon Kim (25095121) Byunggil Lee (9889120) Chang Hwan Kim (9889123) Won Hyuck Kim (25095143) Jea Ho Choi (25095146) SoonYoung Choi (22911110) Yeon S. Chang (7021221) Jong Dae Do (7021196) Geomorphology and earth surface processes Marine geoscience topo-bathymetric dataset multibeam echosounder single-beam echosounder UAV photogrammetry East Sea coast of Korea <p dir="ltr">This item contains topo-bathymetric datasets of the Bonggil-ri coast, Gyeongju, on the east coast of Korea, acquired in spring (April–May) and autumn (October–November) 2020 as part of a coastal erosion study by the Korea Institute of Ocean Science and Technology (KIOST). Each survey combined three platforms covering complementary depth zones: UAV photogrammetry for the beach and backshore, a small-boat single-beam echosounder in 1–20 m water depth, and a ship-borne multibeam echosounder in 5–40 m water depth.</p><p dir="ltr">Files (CSV, UTF-8, comma-separated, header row x,y,z; single-beam files also carry date, time_kst and line):<br>- Bonggil_2020_spring_SB.csv / Bonggil_2020_autumn_SB.csv: quality-controlled single-beam soundings (146,988 and 246,827 points)<br>- Bonggil_2020_spring_MB_1m.csv / Bonggil_2020_autumn_MB_1m.csv: multibeam 1 m grids (5,080,104 and 3,052,102 nodes; 5.08 and 3.05 km²)<br>- Bonggil_2020_spring_UAV_1m.csv / Bonggil_2020_autumn_UAV_1m.csv: UAV DSM 1 m grids with water areas masked (160,606 and 263,130 nodes)</p><p dir="ltr"><br>Coordinate reference: horizontal WGS 84 / UTM zone 52N (EPSG:32652), metres; vertical Pohang chart datum (DL) for all platforms, z positive upward and negative below the datum. Soundings were reduced with 1 min tide records from the Pohang tide station.</p> 2026-09-23T08:01:36Z Dataset Dataset 10.6084/m9.figshare.33971680.v1 https://figshare.com/articles/dataset/_b_Topo-bathymetric_datasets_of_the_Bonggil-ri_coast_Gyeongju_Korea_from_UAV_single-beam_and_multibeam_echosounder_surveys_b_/33971680 CC BY 4.0