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（Lake Brienz）卢特辛河近岸三角洲区域的多波束测深仪（Multibeam Echo Sounder）采集的数字水深模型（Digital Bathymetric Models，缩写DBMs或DEMs）及其配套数字不确定性模型（Digital Uncertainty Models，缩写DUMs）。本次勘测分别于2018年和2023年开展。通过在地理信息系统（Geographic Information System，简称GIS）软件（QGIS或ArcGIS）中对两次勘测得到的数字水深模型进行差值运算，可得到差值水深数字模型（Difference Bathymetric Model，缩写DoD），以此揭示五年间湖床的地形变化情况。由于上述地形表面存在部分数据缺失区域，因此本数据集同时附带了用于制图用途的2018年插值地形表面。