MBES bathymetry of Lake Michigan nearshore near Ogden Dunes/Burns Harbor, Indiana, September 8, 2016

These data are high-resolution bathymetry (lake bottom elevation) in XYZ format, generated from the September 8, 2016, topographic and hydrographic survey of Lake Michigan in an area near Ogden Dunes, Indiana. Hydrographic data were collected using a multibeam echo-sounder (MBES) with integrated inertial navigation solution (INS) mounted on a marine survey vessel. Data were collected as the vessel traversed the lake along survey lines distributed throughout the area. Data collection software integrated and stored the depth data from the multibeam sonar and the horizontal and vertical position and attitude data of the vessel from the INS in real time. Data processing required computer software to extract bathymetric data from the raw data files and to summarize and map the information.

本数据集为XYZ格式的高分辨率水深测绘（湖底高程）数据，由2016年9月8日针对印第安纳州奥格登沙丘附近密歇根湖区域开展的地形与水文测量作业生成。本次水文数据通过搭载于海洋测量船的集成惯性导航解算系统（inertial navigation solution, INS）的多波束测深仪（multibeam echo-sounder, MBES）采集获取。测量船沿覆盖研究区域的测线航行，完成全部数据采集作业。数据采集软件可实时集成并存储多波束声呐获取的水深数据，以及惯性导航系统采集的测量船平面位置、垂直位置与姿态数据。数据处理阶段需借助专用计算机软件从原始数据文件中提取水深测绘数据，并对该信息进行汇总与成图。