Baldwin, Wayne, 2016, 1-m backscatter mosaic in Vineyard and western Nantucket Sounds produced from multiple sidescan-sonar datasets (GeoTIFF Image; UTM, Zone 19N, WGS 84): Open-File Report 2016-1119, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.This is part of the following larger work.Online Links:
Baldwin, Wayne E. , Foster, David S. , Pendleton, Elizabeth A. , Barnhardt, Walter A. , Schwab, William C. , Andrews, Brian D. , and Ackerman, Seth D. , 2016, Shallow Geology, Sea-Floor Texture, and Physiographic Zones of Vineyard and western Nantucket Sounds, Massachusetts: Open-File Report 2016-1119, U.S. Geological Survey, Reston, VA.Online Links:
This is a Raster data set. It contains the following raster data types:
Planar coordinates are encoded using row and column
Abscissae (x-coordinates) are specified to the nearest 1.000000
Ordinates (y-coordinates) are specified to the nearest 1.000000
Planar coordinates are specified in meters
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
508-548-8700 x2226 (voice)
508-457-2310 (FAX)
wbaldwin@usgs.gov
This backscatter intensity mosaic was created as a single continuous image of the acoustic reflectivity of the sea floor of Vineyard and western Nantucket Sounds. Generally, higher backscatter values (light tones) represent rock, boulders, cobbles, gravel, and coarse sand. Lower values (dark tones) usually represent fine sand and muddy sediment. In this final form and at the input resolutions, these data helped define the sediment texture and distribution maps presented as interpretive data layers in USGS OFR 2016-1119.
Poppe, L.J., Ackerman, S.D., Foster, D.S., Blackwood, D.S., Butman, B., Moser, M.S., and Stewart, H.F., 2007, Sea-floor character and surface processes in the vicinity of Quicks Hole, Elizabeth Islands, Massachusetts: Open-File Report 2006-1357, U.S. Geological Survey, Reston, VA.Online Links:
Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Moser, M.S., and Glomb, K.A., 2010, Geological interpretation of the sea floor offshore of Edgartown, Massachusetts: Open-File Report 2009-1001, U.S. Geological Survey, Reston, VA.Online Links:
Pendleton, E.A., Twichell, D.C., Foster, D.S., Worley, C.R, Irwin, B.J., and Danforth, W.W., 2012, High-resolution geophysical data from the sea floor surrounding the Western Elizabeth Islands, Massachusetts: Open-File Report 2011-1184, U.S. Geological Survey, Reston, VA.Online Links:
Andrews, B.D., Ackerman, S.D., Baldwin, W.E., Foster, D.S., and Schwab, W.C., 2014, High-Resolution Geophysical Data from the Inner Continental Shelf: Vineyard Sound, Massachusetts: Open-File Report 2012-1006, U.S. Geological Survey, Reston, VA.Online Links:
Pendleton, E.A., Andrews, B.D., Danforth, W.W., and Foster, D.S., 2014, High-resolution geophysical data collected aboard the U.S. Geological Survey research vessel Rafael to supplement existing datasets from Buzzards Bay and Vineyard Sound, Massachusetts: Open-File Report 2013-1020, U.S. Geological Survey, Reston, VA.Online Links:
Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Barnum, S.R., and Brennan, R.T., 2008, Sea-floor character and sedimentary processes in the vicinity of Woods Hole, Massachusetts: Open File Report 2008-1004, U.S. Geological Survey, Reston, VA.Online Links:
Person who carried out this activity:
508-5488700 x2259 (voice)
508-457-2310 (FAX)
ependleton@usgs.gov
Person who carried out this activity:
508-5488700 x2259 (voice)
508-457-2310 (FAX)
ependleton@usgs.gov
Person who carried out this activity:
508-548-8700 x2226 (voice)
508-457-2310 (FAX)
wbaldwin@usgs.gov
U.S. Geological Survey, 2013, Geologic Mapping of the Seafloor Offshore of Massachusetts: U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.Online Links:
Image pixel values contain acoustic reflectivity values normalized to an 8-bit data range (0-255). Low-backscatter is represented by dark tones (low values) and high-backscatter is represented by bright tones (high values).
The horizontal accuracy of sidescan sonar backscatter is assumed to be 10 meters according to the reports from which the input data were obtained. The mosaicking process in PCI used to combine all the source backscatter mosaics could introduce additional horizontal errors. This composite backscatter intensity mosaic is assumed to be horizontally accurate to within 50-meters, as additional errors could have been introduced during resampling, horizontal projections, and mosaicking within PCI.
This mosaic includes sidescan sonar backscatter data collected during several cruises in Vineyard and western Nantucket Sounds. The input mosaics can be viewed by visiting the websites listed in the source information. Not all of the sources used to create the composite bathymetry grid (vns10m_navd88) were used for the backscatter mosaic.
This backscatter mosaic was created from several backscatter datasets that were processed and published as TIFF images (see Source Information for the individual input images). The source images were enhanced by stretching and color balancing, then the individual images were combined to create a seamless backscatter mosaic. You can download the source data listed in the source contributions.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
508-548-8700 x2226 (voice)
508-457-2310 (FAX)
wbaldwin@usgs.gov
vns_bsmos_1m.zip from USGS Open File report 2016-1119. WinZip v. 14.5 file contains a GeoTIFF image with a world file (and associated metadata) of backscatter data collected in Vineyard and western Nantucket Sounds.
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government
| Data format: | This WinZip v. 14.5 file contains a GeoTIFF image with a world file (and associated metadata) of backscatter data collected in Vineyard and western Nantucket Sounds in format GeoTIFF (version 1.0) GeoTIFF image Size: 307.5 |
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| Network links: |
<https://pubs.usgs.gov/of/2016/1119/GIS_catalog/SourceData/backscatter/vns_bsmos_1m.zip> <https://pubs.usgs.gov/of/2016/1119/ofr2016-1119-data_catalog.html> |
The image contained in the zip file is available as a GeoTIFF with a world file. To utilize this data, the user must have an image viewer, or an image processing or GIS software package capable of importing a TIFF image.
508-548-8700 x2226 (voice)
508-457-2310 (FAX)
wbaldwin@usgs.gov
