H11079_GEO_B: 3-m Bathymetric Grid of National Oceanic and Atmospheric Administration (NOAA) Survey H11079 of Great Round Shoal Channel, Offshore Massachusetts (Geographic)

The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and the Massachusetts Office of Coastal Zone Management (MA CZM), is producing detailed geologic maps of the coastal sea floor. Imagery, originally collected by NOAA for charting purposes, provide a fundamental framework for research and management activities along this part of the Massachusetts coastline, show the composition and terrain of the seabed, and provide information on sediment transport and benthic habitat. Interpretive data layers were derived from multibeam echo-sounder and sidescan sonar data collected in Great Round Shoal Channel, a passage through the shoals at the eastern entrance to Nantucket Sound, off Cape Cod, Massachusetts. In June 2006, bottom photographs and surficial sediment data were acquired as part of a ground-truth reconaissance survey.

美国地质调查局（U.S. Geological Survey, USGS）联合美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）以及马萨诸塞州海岸带管理办公室（Massachusetts Office of Coastal Zone Management, MA CZM），正在编制沿岸海底的详细地质图。最初由NOAA为海图绘制工作采集的影像数据，为马萨诸塞州该段海岸线的科研与管理活动提供了核心基础框架，可直观展示海床的物质组成与地形地貌，同时提供沉积物运移及底栖生境（benthic habitat）的相关信息。解释性数据图层源自采集自大圆浅滩航道（Great Round Shoal Channel）的多波束测深仪（multibeam echo-sounder）与侧扫声呐（sidescan sonar）数据，该航道位于马萨诸塞州科德角外海，是通往南塔开特湾东侧浅滩入口的通航水道。2006年6月，作为地面验证踏勘调查的一部分，项目组采集了海底照片与表层沉积物数据（surficial sediment data）。