Color Shaded-Relief GeoTIFF Image Showing the 2-m Bathymetry Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H11251 Offshore of Rocky Point, New York (H11251_2MMB_GEO.TIF, Geographic, WGS84)

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 H11251 offshore of Rocky Point, New York and during November 2009, bottom photographs and surficial sediment data were acquired as part of a ground-truth reconnaissance survey of this area. Interpretive data layers were derived from the multibeam echo-sounder and sidescan-sonar data and the ground-truth data used to verify them. For more information on the ground-truth survey see http://quashnet.er.usgs.gov/data/2009/09059/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。最初由NOAA为海图绘制目的采集的水深测量数据与侧扫声呐（sidescan-sonar）图像，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，可直观反映海底的组成与地形特征，同时提供沉积物运移及底栖生境（benthic habitat）相关的关键信息。2008年10月，NOAA完成了纽约州洛基角（Rocky Point）近海的水文测量任务H11251；2009年11月，作为该区域地面验证踏勘调查的组成部分，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声呐（multibeam echo-sounder）及侧扫声呐数据中提取了解释性数据图层，并通过地面验证数据对其进行校核验证。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/2009/09059/