10-m resolution image of shaded relief multibeam bathymetry in Massachusetts Bay, pseudocolored by backscatter intensity (MB_BACKPC10M.TIF)

The U.S. Geological Survey has conducted geologic mapping to characterize the sea floor offshore of Massachusetts. The mapping was carried out using a Simrad Subsea EM 1000 Multibeam Echo Sounder on the Frederick G. Creed on four cruises conducted between 1994 and 1998. The mapping was conducted in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and with support from the Canadian Hydrographic Service and the University of New Brunswick.
The long-term goal of this mapping effort is to produce high-resolution geologic maps and a Geographic Information System (GIS) project that presents images and grids of bathymetry, shaded relief bathymetry, and backscatter intensity data from these surveys that will serve the needs of research, management and the public.

美国地质调查局（U.S. Geological Survey）已开展海底地质填图工作，以详细表征马萨诸塞州近海的海底地质特征。本次填图作业由“弗雷德里克·G·克里德号”科考船搭载Simrad Subsea EM 1000多波束测深仪（Simrad Subsea EM 1000 Multibeam Echo Sounder）完成，共实施四次航次，作业时段为1994年至1998年。本次填图工作与美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）合作开展，并获得加拿大水文局与新不伦瑞克大学的支持。

本次填图工作的长期目标是编制高分辨率地质图，并搭建一套地理信息系统（Geographic Information System, GIS）项目，该项目将展示本次勘测获取的水深地形数据、晕渲水深地形数据以及反向散射强度数据的图像与栅格数据，以满足科研、海洋管理及社会公众的相关需求。