Citation_Information:
Originator: U.S. Geological Survey
Originator: U.S. Army Corps of Engineers
Publication_Date: 2017
Title:
GeoTIFF image of the backscatter intensity of the sea floor of the Historic Area Remediation Site in 1996 (3-m resolution, Mercator, WGS 84)
Edition: 2.0
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F74B2ZGX
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: https://doi.org/10.5066/F74B2ZGX
Online_Linkage:
Larger_Work_Citation:
Citation_Information:
Originator: Bradford Butman
Originator: William W. Danforth
Originator: John E. Hughes Clarke
Originator: Richard P. Signell
Publication_Date: 2017
Title:
Bathymetry and backscatter intensity of the sea floor of the Historic Area Remediation Site in 1996, 1998, and 2000
Edition: 1.0
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F74B2ZGX
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested citation: Butman, Bradford, Danforth, W.W., Clarke, J.E.H., and Signell, R.P., 2017, Bathymetry and backscatter intensity of the sea floor of the Historic Area Remediation Site in 1996, 1998, and 2000: U.S. Geological Survey data release,
https://doi.org/10.5066/F74B2ZGX.
Online_Linkage: https://doi.org/10.5066/F74B2ZGX
Abstract:
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.
Purpose:
The GeoTIFF image of backscatter intensity provides qualitative information on the sediment texture and roughness of the sea floor. Backscatter intensity, a measure of the strength of the acoustic return from the sea floor, is a function of the properties of the surficial sediments and of the bottom roughness. Generally high backscatter intensity (strong return), shown as light gray tones, is associated with rock or coarse-grained sediment, and low backscatter intensity (weak return), shown as dark gray tones, is associated with fine-grained sediments.
Supplemental_Information:
This is Edition 2.0 of GeoTIFF Hars1996Mos.tif. An error in the University of New Brunswick (Clarke, 1998, see cross reference) processing software that resulted in the multibeam observations not being properly projected onto a plane was discovered in 2003. A second error in the gridding algorithm was discovered in 2007, requiring a shift of 1/2 grid cell to northwest. Edition 2.0 differs from Edition 1.0 (Butman and others, 2002) in that it was processed using corrected software; comparison of the location of selected features suggests that Edition 2.0 is shifted approximately 10 m to the east compared to Edition 1.0. In addition, the stretch used to create the 8-bit image is 0-254 and the value 255 is no data. In Edition 1.0, the stretch is 0-255 and the value 255 is also no data. Maps and interpretations of these data are available in Butman and others (2002), Butman (2002), and Butman and others (2003) (citations in cross references). Other datasets from the 1996 HARS survey, as well as datasets from surveys of the HARS in 1998 and 2000, may be found in Butman and others (2017) (see larger work citation).
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:588103cde4b00a062355a507
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: backscatter intensity
Theme_Keyword: GeoTIFF image
Theme_Keyword: multibeam
Theme_Keyword: 3-m resolution image
Theme_Keyword: sea floor mapping
Theme_Keyword: Simrad EM 1000
Theme_Keyword: Canadian Coast Guard ship (CCGS) Frederick G. Creed
Theme_Keyword: WHCMSC field activity 1996-043-FA
Theme_Keyword: Woods Hole Coastal and Marine Science Center (WHCMSC)
Theme_Keyword: Coastal and Marine Geology Program (CMGP)
Theme_Keyword: U.S. Geological Survey (USGS)
Theme_Keyword: Canadian Hydrographic Service (CHS)
Theme_Keyword: University of New Brunswick (UNB)
Theme_Keyword: U.S. Army Corps of Engineers (USACE)
Theme_Keyword: Open-File Report 00-503
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sea-floor acoustic reflectivity
Theme_Keyword: image mosaics
Theme_Keyword: multibeam sonar
Theme_Keyword: marine geophysics
Theme_Keyword: geospatial datasets
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Historic Area Remediation Site (HARS)
Place_Keyword: Hudson Shelf Valley
Place_Keyword: New York Bight
Place_Keyword: Middle Atlantic Bight
Place_Keyword: New York
Place_Keyword: New Jersey
Place_Keyword: North Atlantic Ocean
Stratum:
Stratum_Keyword_Thesaurus: none
Stratum_Keyword: sea floor
Temporal:
Temporal_Keyword_Thesaurus: none
Temporal_Keyword: 1996
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095
Citation_Information:
Originator: Butman, Bradford
Originator: Danforth, W.W.
Originator: Knowles, S.C.
Originator: May, Brian
Originator: Serrett, Laurie
Publication_Date: 2002
Title:
Seafloor topography and backscatter intensity of the Historic Area Remediation Site (HARS), offshore of New York, based on multibeam surveys conducted in 1996, 1998, and 2000
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 00-503
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/of/2000/of00-503/
Citation_Information:
Originator: Butman, Bradford
Originator: Middleton, T.J.
Originator: Thieler, E.R.
Originator: Schwab, W.C.
Publication_Date: 2003
Title:
Topography, shaded-relief, and backscatter intensity of the Hudson Shelf Valley, Offshore of New York
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 03-372
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/of/2003/of03-372/