U.S. Geological Survey
2014
Composite interferometric backscatter mosaic collected by the U.S. Geological Survey in Muskeget Channel, MA, October 2010 (UTM Zone 19N, WGS 84, GeoTIFF, 1-m resolution, muskeget_swath_1m.tif)
1.0
raster digital data
Open-File Report
2012-1258
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/ofr20121258
https://pubs.usgs.gov/of/2012/1258/GIS_catalog/backscatter/swath_bs_1m.zip
Elizabeth A. Pendleton
Jane F. Denny
William W. Danforth
Wayne E. Baldwin
Barry J. Irwin
2014
High-Resolution Swath Interferometric Data Collected within Muskegat Channel, Massachusetts
1.0
Open-File Report
2012-1258
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/ofr20121258
https://pubs.usgs.gov/of/2012/1258/
These data were collected in a collaboration between the Woods Hole Oceanographic Institution and the U.S. Geological Survey (USGS). The primary objective of this program was to collect baseline bathymetry for Muskeget Channel, Massachusetts, and identify areas of morphologic change within and around the channel. Repeat surveys in select areas were collected one month apart to monitor change. These data were collected to support an assessment of the effect on sediment transport that a tidal instream energy conversion facility would have within Muskeget Channel. Accurate data and maps of sea-floor topography are important first steps in monitoring bedform migration, fish habitat, marine resources, and environmental changes due to natural or human impacts. The data include high-resolution bathymetry, acoustic-backscatter intensity, sound velocity in water, and navigation data. These data were collected during two surveys between October 2010 and November 2011 onboard the research vessel (RV) Rafael using an SEA Ltd. SwathPlus interferometric sonar (234 kilohertz). More information about the cruise can be found on the Woods Hole Coastal and Marine Science Center field activity Web page at https://cmgds.marine.usgs.gov/fan_info.php?fan=2010-072-FA.
This GeoTIFF (Tagged Image File Format) contains acoustic backscatter data that were collected in October 2010. These data are used to define the seafloor morphology surrounding Muskeget Channel, Massachusetts
20101012
20101013
20101014
20101019
ground condition
None planned
-70.505304
-70.394974
41.417575
41.291845
USGS Metadata Identifier
USGS:fe352da6-f7f5-4f57-8b34-3df5ff2bf8d3
None
U.S. Geological Survey
USGS
Woods Hole Coastal and Marine Science Center
WHCMSC
Coastal and Marine Geology Program
CMGP
backscatter
SEA Ltd Swathplus interferometric sonar
interferometric backscatter
GeoTIFF image
grey scale
composite image
WHCMSC field activity report number 2010-072-FA
mosaic
ISO 19115 Topic Category
oceans
geoscientificInformation
imageryBaseMapsEarthCover
USGS Thesaurus
sea-floor acoustic reflectivity
image mosaics
interferometric sonar
marine geophysics
geospatial datasets
None
North America
Atlantic Ocean
Massachusetts
United States
Muskeget Channel
Vineyard Sound
Martha's Vineyard
Nantucket Sound
Chappaquiddick Island
Edgartown
Mutton Shoal
Muskeget Island
Nantucket Island
Tuckernuck Island
Wasque Point
Cape Poge
Katama Bay
Hawes Shoal
Norton Shoal
Bass Ledge
Shovelful Shoal
Wasque Shoal
None
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Elizabeth A. Pendleton
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2259
508-457-2310
ependleton@usgs.gov
https://pubs.usgs.gov/of/2012/1258/GIS_catalog/backscatter/BS_thumb.png
gray scale image of backscatter mosaic
PNG
Microsoft Windows 7 Enterprise Service Pack 1; ArcGIS Desktop 9.3 Service Pack 1; Build 1850
Poppe, L.J.
McMullen, K.Y.
Foster, D.S.
Blackwood, D.S.
Williams, S.J.
Ackerman, S.D.
Moser, M.S.
Glomb, K.A.
2010
Geological Interpretation of the Sea Floor Offshore of Edgartown, Massachusetts
document
Open-File Report
2009-1001
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/of/2009/1001/
Denny, J.F.
Danforth, W.W.
Foster, D.S.
Sherwood, C.R.
2009
Geophysical Data Collected off the South Shore of Martha's Vineyard, Massachusetts
document
Open-File Report
2008-1288
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/of/2008/1288/
John Gann
unknown
Sonar Wiz 5
5
model
Mountain View, CA
Chesapeake Technology Inc.
http://www.chesapeaketech.com/products/sonarWiz-5.php
David Finlayson
2011
SXPTools User Guide
2.0
document
Santa Cruz, CA
U.S. Geological Survey
Although backscatter was not an essential data source for the Muskeget Channel mapping program, they are provided here as supplemental data because they are collected simultaneous with interferometric bathymetry data and are relatively easy to process and release.
Interferometric backscatter collected during the first survey of 2010-072-FA were used to create this mosaic. Data from the second survey (on 20101119), which reoccupied lines from the first survey, were not included in this mosaic. Any change in backscatter between surveys 1 and 2 would be nearly negligle in a 1-meter mosaic and outside the scope of the goals of this survey.
The navigation for these data was acquired with a Coda Octopus F180 Differential Global Positioning System + Wide Area Augmentation System (DGPS+WAAS); they are accurate to + or - 1 to 2 meters, horizontally. All DGPS data are referenced to WGS 84, and vertical distance between the pole-mounted interferometric sonar head, 0.5m below the sea surface, and the DGPS antenna located on the same pole on the bow of the R/V Rafael, 2.5 m above the sea surface, are corrected.
Information unavailable from original metadata - assumed USGS
unknown
Information unavailable from original metadata
disc
20101012
20101013
20101014
20101019
ground condition
USGS
Backscatter data were acquired with a SEA Swathplus interferometric sonar (234 kHz) mounted on the bow of the R/V Rafael of Woods Hole, MA. The data were acquired with SwathPlus Software (versions: 3.7.10). Tracklines are spaced 70-m apart.
Swathplus raw backscatter files (.sxr's) were imported into Chesapeake Technology Inc.'s SonarWiz software (version 5). The water-bottom was identified using a user-assisted bottom tracking algorithm. After all the altitudes were correctly defined, an empirical gain normalization (EGN) function for backscatter (Finlayson, 2010) was used to interpolate across data gaps at nadir and enhance the visual display of the data by optimizing the dynamic range of backscatter intensity.
SonarWiz was also used to mosaic the lines into a single backscatter file, then export the mosaic to a 1-meter 24-bit GeoTIFF image.
2010
Elizabeth Pendleton
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700x2259
(508) 457-2310
ependleton@usgs.gov
Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Attempted to modify http to https where appropriate. Added the DOI link in the Identification section - both as the first link and as part of the Larger Work citation. Removed LIDAR bounding coordinates - an artifact of Esri and MP processing. The source information was incomplete and had to be modified to meet the standard. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.
20171006
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
USGS Thesaurus keywords added to the keyword section.
20180720
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20200908
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Raster
Pixel
13812
9001
1
Universal Transverse Mercator
19
0.999600
-69.000000
0.000000
500000.000000
0.000000
row and column
1.000000
1.000000
meters
D_WGS_1984
WGS_1984
6378137.000000
298.257224
There are no attributes associated with a GeoTIFF image. Image pixel values contain acoustic reflectivity values normalized to an 24-bit data range. Low-backscatter is represented by dark tones (low values) and high-backscatter is represented by bright tones (high values). The background color is set to 0-0-0 and can be turned off without removing data values.
U.S. Geological Survey
Elizabeth A. Pendleton
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700x2259
(508) 457-2310
ependleton@usgs.gov
Downloadable Data
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.
GeoTIFF
SonarWiz
This WinZip (v 14.5) file contains a GeoTIFF image (and TIFF wold file -- tfw) of backscatter data collected around Muskeget Channel, MA, and associated metadata.
use WinZip or pkUnzip
12
https://pubs.usgs.gov/of/2012/1258/GIS_catalog/backscatter/swath_bs_1m.zip
https://pubs.usgs.gov/of/2012/1258/html/ofr2012-1258_GIS_catalog.html
Data can be downloaded via the World Wide Web (WWW)
none
This zip file contains a GeoTIFF image and world file (.tfw). To utilize these data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image and it's assocaited world file.
20240318
Elizabeth A. Pendleton
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700x2259
(508) 457-2310
whsc_data_contact@usgs.gov
The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318)
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
None
None