Color Shaded-Relief GeoTIFF Image Showing the 1-m Bathymetry Generated from National Oceanic and Atmospheric Administration (NOAA) Survey H12007 in the Vicinity of Cross Rip Channel, Nantucket Sound (H12007_1MMB_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, originally collected by NOAA for charting purposes, provides a fundamental framework for research and management activities off southern New England, shows the character and terrain of the seabed, and provides information on sediment transport and benthic habitat. During April-May 2009 NOAA completed hydrographic survey H12007 in the vicinity of Cross Rip Channel in Nantucket Sound off southern Cape Cod, Massachusetts and during June 2011 bottom photographs and surficial sediment data were acquired as part of ground-truth reconnaissance surveys of this area. Interpretations were derived from the multibeam echo-sounder data and the ground-truth data used to verify them.

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，正在编制新英格兰南部近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（bathymetry）数据，可为新英格兰南部近海的科研与管理活动提供基础框架，能够呈现海底的特征与地形，并提供沉积物输运及底栖生境（benthic habitat）相关信息。2009年4月至5月期间，NOAA在马萨诸塞州科德角南部近海的楠塔基特海峡（Nantucket Sound）克罗斯里普水道（Cross Rip Channel）周边完成了编号为H12007的水文测量作业；2011年6月，为开展该区域的地面验证（ground-truth）踏勘调查，采集了海底照片与表层沉积物数据。本次数据集的解译成果源自多波束测深声呐（multibeam echo-sounder）数据，并通过地面验证数据对解译结果进行了校核。