Bathymetric map of Lido di Dante coastal area (Ravenna, Italy) of December 13, 2021

This processed bathymetry was aquired with the use of single-beam echosounder (SBE) sonar data collected in December 13, 2021 as a part of bathymetric monitoring of evolution of coastal area carried out by Proambiente Scrl and CNR ISMAR (Bologna, Italy) in the frame of TAO project. The bathymetry data was acquired using an ASV (autonomous surface vehicle), called OpenSWAP (Stanghellini et al., 2020), equipped by an SBE operating at 200 kHz coupled with a double antenna GNSS system with WAAS/EGNOS enabled D-GPS, providing true heading and position for navigation and data positioning. This acquisition leg was part of a log-term monitoring of the seabed evolution, so the navigation lines were kept the same for all data acquisition campaigns. The use of the ASV OpenSWAP allowed for retracing the same routes with a maximum error contained within +/- 30 cm under reasonable sea conditions (Stanghellini et al., 2020). The collected data was finally elaborated with GMT Generic Mapping Tool (Wessel et al., 2019) with its nearneighbor and grdfilter algorithms to obtain the shared data. The grid are represented in geographical coordinates LAT, LON, with a decimal degree format, the datum is in WGS84 (EPSG:4326). These bathymetry grids are provided in netCDF grid format and the relative geoTIFF file rapresenting the bathymetry of the area.本数据集为经过预处理的水深地形数据，其原始声呐数据采集自2021年12月13日，采用单波束测深仪（single-beam echosounder，SBE）采集所得。该数据是意大利博洛尼亚的Proambiente Scrl与CNR ISMAR在TAO项目框架下，开展海岸区域演化水深监测工作的一部分。本次水深数据通过名为OpenSWAP的自主水面航行器（autonomous surface vehicle，ASV）完成采集（Stanghellini等，2020），该航行器搭载工作频率为200kHz的单波束测深仪，以及支持WAAS/EGNOS的双天线差分GPS（D-GPS）全球导航卫星系统，可为导航与数据定位提供真实航向及位置信息。本次测线属于海底演化长期监测任务的一部分，所有数据采集任务均采用完全一致的导航航线。依托自主水面航行器OpenSWAP，可精准重复沿预设航线作业，在海况适宜的条件下，航线重复误差最大不超过±30厘米（Stanghellini等，2020）。最终采集数据通过通用制图工具（Generic Mapping Tool，GMT，Wessel等，2019）的nearneighbor与grdfilter算法进行处理，得到本共享数据集。数据网格采用地理坐标系（纬度LAT、经度LON），格式为十进制度，基准面为WGS84（EPSG:4326）。本次共享的水深地形网格数据以netCDF网格格式存储，同时附带反映研究区域水深地形的对应geoTIFF文件。