Repetitive bathymetric surveys in the Lütschine delta (Lake Brienz, Switzerland)

This dataset includes Multibeam Echo Sounder Digital Bathymetric Models (DBMs or DEMS) and their associated Digital Uncertainty Models (DUMs) from the proximal Lütschine Delta of Lake Brienz, Switzerland. Surveys were performed in 2018 and 2023. By subtracting the DBMs within a GIS software (QGIS or ArcGIS) , a DBM of Difference (DoD) reveals the changes in the lakefloor over a five-year period. These surfaces contain a few areas with missing data, therefore an interpolated surface for 2018 is also included for mapping purposes.本数据集涵盖瑞士布里恩茨湖卢特辛三角洲近岸区域的多波束测深仪（Multibeam Echo Sounder）采集的数字水深模型（Digital Bathymetric Models，简称DBMs或DEMs）及其配套数字不确定性模型（Digital Uncertainty Models，简称DUMs）。本次勘测分别于2018年与2023年开展。通过在地理信息系统（GIS）软件（QGIS或ArcGIS）中对两组数字水深模型进行差值运算，可得到差值水深模型（Difference of Bathymetric Models，简称DoD），用以揭示五年间湖床的地形变化。由于上述地形表面存在部分数据缺失区域，数据集还附带了2018年的插值地形表面，以供制图使用。