H11079_1MGEO_SSS.TIF: 1-meter Composite Grayscale Image of the Sidescan Sonar Data From National Oceanic and Atmospheric Administration (NOAA) Survey H11079 of the Sea Floor in 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）与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）合作，正在编制沿海海底详细地质图。最初由NOAA为海图制图目的采集的影像资料，为马萨诸塞州该段海岸线沿线的科研与管理活动提供了基础框架，可揭示海床的组成与地形，并提供有关沉积物运移及底栖生境（benthic habitat）的信息。解释性数据图层源自在大浅滩水道（Great Round Shoal Channel）采集的多波束测深仪（multibeam echo-sounder）与侧扫声呐（sidescan sonar）数据，该水道位于马萨诸塞州科德角（Cape Cod）外、通往南塔基特湾（Nantucket Sound）东部入口的浅滩航道。2006年6月，作为地面验证踏勘调查（ground-truth reconnaissance survey）的一部分，采集了海底照片与表层沉积物数据。