2-m Bathymetric Grid of National Oceanic and Atmospheric Administration (NOAA) Survey H11997 Offshore in Eastern Long Island Sound (H11997_2M_UTM, UTM Zone 18, NAD83)

The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA), is producing detailed geologic maps of the coastal sea floor. Bathymetry and sidescan-sonar imagery, originally collected by NOAA for charting purposes, provides a fundamental framework for research and management activities in Long Island Sound, shows the composition and terrain of the seabed, and provides information on sediment transport and benthic habitat. During October 2008 NOAA completed hydrographic survey H11997 offshore in eastern Long Island Sound, and during May 2010 bottom photographs and surficial sediment data were acquired as part of a ground-truth reconnaissance survey of this area. Two interpretive data layers were derived from the multibeam echo-sounder and the ground-truth data used to verify them. For more information on the ground-truth survey see http://quashnet.er.usgs.gov/data/2010/10015/

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）合作，正在编制沿海海底的详细地质图。原本由NOAA为海图绘制目的采集的水深测量（bathymetry）数据与侧扫声呐图像（sidescan-sonar imagery），为长岛海峡（Long Island Sound）的科研与管理活动提供了核心基础框架，可呈现海床的物质组成与地形特征，同时可为沉积物运移与底栖生境（benthic habitat）研究提供相关数据。2008年10月，NOAA于长岛海峡东部近海完成了编号为H11997的水文测量（hydrographic survey）任务；2010年5月，作为该区域地面验证（ground-truth）踏勘调查的一部分，研究团队采集了海底照片与表层沉积物数据。研究人员从多波束测深仪（multibeam echo-sounder）数据中生成了两组解释性数据图层，并通过地面验证数据对其开展校核工作。如需了解该地面验证调查的更多详情，请访问：http://quashnet.er.usgs.gov/data/2010/10015/