GeoTIFF image of the shaded-relief bathymetry of the Historic Area Remediation Site in 2000 (3-m resolution, Mercator, WGS 84)

Surveys of the bathymetry and backscatter intensity of the sea floor of the Historic Area Remediation Site (HARS), offshore of New York and New Jersey, were carried out in 1996, 1998, and 2000 using a Simrad EM1000 multibeam echosounder mounted on the Canadian Coast Guard ship Frederick G. Creed. The objective of the multiple echosounder surveys was to map the bathymetry and surficial sediments over time as dredged material was placed in the HARS to remediate contaminated sediments. Maps derived from the multibeam surveys show sea-floor bathymetry, shaded-relief bathymetry, and backscatter intensity (a measure of sea-floor texture and roughness) at a spatial resolution of 3 meters. The area was mapped by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers and with support from the Canadian Hydrographic Service and the University of New Brunswick.1996年、1998年与2000年，相关团队使用搭载于加拿大海岸警卫队“弗雷德里克·G·克里德”号的Simrad EM1000多波束测深仪（multibeam echosounder），对位于美国纽约与新泽西州外海的历史区域修复场址（Historic Area Remediation Site，缩写HARS）开展了海底水深与背散射强度（backscatter intensity）调查。本次系列多波束测深调查的核心目标，是在疏浚物料被投放至该场址以修复受污染沉积物的过程中，长期追踪测绘海底水深与表层沉积物的时空分布特征。基于本次系列多波束调查生成的测绘成果，可呈现海底水深图、晕渲水深图以及背散射强度图——背散射强度是衡量海底纹理与粗糙度的量化指标，所有成果的空间分辨率均为3米。本区域的测绘工作由美国地质调查局（U.S. Geological Survey，简称USGS）联合美国陆军工程兵团（U.S. Army Corps of Engineers）开展，并得到了加拿大水文局（Canadian Hydrographic Service）与新不伦瑞克大学（University of New Brunswick）的支持。